Materials Issues in Fatigue and Fracture
|
|
|
- Candace Cook
- 10 years ago
- Views:
Transcription
1 Materials Issues in Fatigue and Fracture 5.1 Fundamental Concepts 5.2 Ensuring Infinite Life 5.3 Finite Life 5.4 Summary FCP 1
2 5.1 Fundamental Concepts Structural metals Process of fatigue A simple view of fatigue FCP 2
3 Three common structural metals F CC BCC H CP Face-centered B ody-centered Hexagonal Cubic Cubic close-packed A luminum I ron Titanium 12 S lip s ys tems 48 S lp s ystems 3 S lip s ys tems The three structural metals have entirely different crystal structures and slip systems, which leads one to imagine that they would have differing responses to cyclic loading. FCP 3
4 Aluminum Alloys Property Value Consequences Crystal Structure FCC Polycrystals ductile, low yield strength, strain-rate and temperature insensitiv e Modulus (GPa) 70 Low bond strength RT Homologous T 0.29 Close to creep temperature Yield Strength (MPa) Basic Microstructure Strengthening St rategy Strengthening St rategy Singl e or two phase Solid solution Precipitation FCP 4
5 Precipitation hardening of Al Extended solubility permits creation of dispersoids or precipitates which impede dislocation motion. FCP 5
6 Structural steel Property Value Consequences Crystal Structure BCC (FCC) Polycrystals ductile, high yield strength, strain-rate and temperature sensitiv e Modulus (GPa) 189 Reflects high bond strength RT Homologous T 0.15 High melting point Yield Strength (MPa) Basic Microstructure Two phase Ferrite-pearlite Strengthening Strategy Strengthening Strategy Microstructure size control Transformation products Wide range of strengths possibl e through heat treatment Martensitic transformation FCP 6
7 Structural steel Development of hypoeutectoid, eutectoid, and hypereutectoid microstructures FCP 7
8 Titanium alloys Property Value Cons equences Cryst al Structu re HCP (BCC ) β Titanium is BCC and hence very ductil e; whereas, HCP α is less so. Modulus (GPa) 120 Reflects high bond st rength RT Homologous T 0.15 High melting point Yield Strength (MPa) Basic Microst ructure Two ph ase Alph a and Beta phases Strengthening St rategy Strengthening St rategy Microst ructure size cont rol Transformation products Wide range of strengths possibl e through h eat treatment and cont rol of microst ructure Martensiti c transformation FCP 8
9 Titanium microstructures Effects of composition and heat treatment FCP 9
10 Titanium heat treatment Ti6Al4V annealed at T>1278? K in the ß field. Upon cooling, get Widmanstatten or basket weave as β -> α by diffusion. Ti6Al4V annealed at 973 K in a region having both α and β equi-axed grains. Upon slow cooling get? plus Widmanstatten α. FCP 10
11 Fatigue of a component The fatigue life of an engineering component consists of two main life periods: Initiation or nucleation of a fatigue crack (N I ) And Its growth to failure (N P ) FCP 11
12 Simple questions: How do basic material properties influence a component s fatigue life? Which materials are most fatigue resistant? FCP 12
13 Complex answers The answer depends upon the situation. Life regime - short or long? Presence of residual stresses? Compressive residuals Tensile residuals? Presence of stress-strain concentrators? Due to component shape. Due to mistakes during material processing. Due to inherent flaws in the material. FCP 13
14 5.1 Fundamental Concepts Structural metals Process of fatigue A simple view of fatigue FCP 14
15 Process of fatigue 4. Stage I (shear) fatigue crack 3. Intrusions, extrusions 5. Stage II fatigue crack 2. Persistent slip bands 1. Cyclic slip FCP 15
16 1. Cyclic slip First cycle Cyclic slip occurs within a grain and therefore operates on an atomic scale and are thus is controlled by features seen at that scale. Many cycles later - cyclic hardening FCP 16
17 2. Persistent slip bands (PSB) Development of cell structures (hardening) Increase in stress amplitude (under strain control) Break down of cell structure to form PSBs Localization of slip in PSBs Cyclic hardening Cyclic softening PSB FCP 17
18 3. Intrusions and extusions Cyclically hardened material Extrusion Cyclically hardened material Intrusion Cyclically hardened material FCP 18
19 3. Intrusions and extrusions Intrusions and extrusions on the surface of a Ni specimen FCP 19
20 3. Intrusions and extrusions Stage I Fatigue crack Extrusion Intrusion Persistent Slip Band FCP 20
21 3. Intrusions and extrusions Fatigue crack initiation at an inclusion Cyclic slip steps (PSB) Fatigue crack initiation at a PSB FCP 21
22 4. Stage I fatigue crack S Single primary slip system S individual grain near - tip plastic zone Stage I fatigue cracks are the size of the grains and are thus controlled by features seen at that scale: grain boundaries, mean stresses, environment. FCP 22
23 5. Stage II crack growth Stage II fatigue cracks much larger than the grain size and are thus sensitive only to large scale microstructural features - texture, global residual stresses, etc. Plexiglas FCP 23
24 5.1 Fundamental Concepts Structural metals Process of fatigue A simple view of fatigue FCP 24
25 A simple view of fatigue 1. Will a crack nucleate? 2. Will it grow? 3. How fast will it grow? Cyclic nucleation and arrested growth Crack growth FCP 25
26 Infinite life - no crack growth Infinite life Sharp notches may nucleate cracks but the remote stress may not be large enough to allow the crack to leave the notch stress field. FCP 26
27 Finite Life - growth of cracks Small cracks behave differently than long cracks. FCP 27
28 Summary The Fatigue process consists of: Cyclic slip, Crack initiation, Stage I crack growth, Stage II crack growth, Failure. In the simplest terms, there are two problems: Ensuring infinite fatigue life Prolonging a finite fatigue life FCP 28
Chapter Outline Dislocations and Strengthening Mechanisms
Chapter Outline Dislocations and Strengthening Mechanisms What is happening in material during plastic deformation? Dislocations and Plastic Deformation Motion of dislocations in response to stress Slip
Mechanical Properties of Metals Mechanical Properties refers to the behavior of material when external forces are applied
Mechanical Properties of Metals Mechanical Properties refers to the behavior of material when external forces are applied Stress and strain fracture or engineering point of view: allows to predict the
Chapter Outline Dislocations and Strengthening Mechanisms
Chapter Outline Dislocations and Strengthening Mechanisms What is happening in material during plastic deformation? Dislocations and Plastic Deformation Motion of dislocations in response to stress Slip
Iron-Carbon Phase Diagram (a review) see Callister Chapter 9
Iron-Carbon Phase Diagram (a review) see Callister Chapter 9 University of Tennessee, Dept. of Materials Science and Engineering 1 The Iron Iron Carbide (Fe Fe 3 C) Phase Diagram In their simplest form,
Chapter Outline: Phase Transformations in Metals
Chapter Outline: Phase Transformations in Metals Heat Treatment (time and temperature) Microstructure Mechanical Properties Kinetics of phase transformations Multiphase Transformations Phase transformations
The atomic packing factor is defined as the ratio of sphere volume to the total unit cell volume, or APF = V S V C. = 2(sphere volume) = 2 = V C = 4R
3.5 Show that the atomic packing factor for BCC is 0.68. The atomic packing factor is defined as the ratio of sphere volume to the total unit cell volume, or APF = V S V C Since there are two spheres associated
Solution for Homework #1
Solution for Homework #1 Chapter 2: Multiple Choice Questions (2.5, 2.6, 2.8, 2.11) 2.5 Which of the following bond types are classified as primary bonds (more than one)? (a) covalent bonding, (b) hydrogen
Strengthening. Mechanisms of strengthening in single-phase metals: grain-size reduction solid-solution alloying strain hardening
Strengthening The ability of a metal to deform depends on the ability of dislocations to move Restricting dislocation motion makes the material stronger Mechanisms of strengthening in single-phase metals:
ME 612 Metal Forming and Theory of Plasticity. 1. Introduction
Metal Forming and Theory of Plasticity Yrd.Doç. e mail: [email protected] Makine Mühendisliği Bölümü Gebze Yüksek Teknoloji Enstitüsü In general, it is possible to evaluate metal forming operations
FATIGUE CONSIDERATION IN DESIGN
FATIGUE CONSIDERATION IN DESIGN OBJECTIVES AND SCOPE In this module we will be discussing on design aspects related to fatigue failure, an important mode of failure in engineering components. Fatigue failure
The mechanical properties of metal affected by heat treatment are:
Training Objective After watching this video and reviewing the printed material, the student/trainee will learn the basic concepts of the heat treating processes as they pertain to carbon and alloy steels.
Module 34. Heat Treatment of steel IV. Lecture 34. Heat Treatment of steel IV
Module 34 Heat reatment of steel IV Lecture 34 Heat reatment of steel IV 1 Keywords : Austenitization of hypo & hyper eutectoid steel, austenization temperature, effect of heat treatment on structure &
CHAPTER 7 DISLOCATIONS AND STRENGTHENING MECHANISMS PROBLEM SOLUTIONS
7-1 CHAPTER 7 DISLOCATIONS AND STRENGTHENING MECHANISMS PROBLEM SOLUTIONS Basic Concepts of Dislocations Characteristics of Dislocations 7.1 The dislocation density is just the total dislocation length
LABORATORY EXPERIMENTS TESTING OF MATERIALS
LABORATORY EXPERIMENTS TESTING OF MATERIALS 1. TENSION TEST: INTRODUCTION & THEORY The tension test is the most commonly used method to evaluate the mechanical properties of metals. Its main objective
Module #17. Work/Strain Hardening. READING LIST DIETER: Ch. 4, pp. 138-143; Ch. 6 in Dieter
Module #17 Work/Strain Hardening READING LIST DIETER: Ch. 4, pp. 138-143; Ch. 6 in Dieter D. Kuhlmann-Wilsdorf, Trans. AIME, v. 224 (1962) pp. 1047-1061 Work Hardening RECALL: During plastic deformation,
WJM Technologies excellence in material joining
Girish P. Kelkar, Ph.D. (562) 743-7576 [email protected] www.welding-consultant.com Weld Cracks An Engineer s Worst Nightmare There are a variety of physical defects such as undercut, insufficient
Fatigue of Metals Copper Alloys. Samuli Heikkinen 26.6.2003
Fatigue of Metals Copper Alloys Samuli Heikkinen 26.6.2003 T 70 C Temperature Profile of HDS Structure Stress amplitude 220 MPa Stress Profile of HDS Structure CLIC Number of Cycles f = 100 Hz 24 hours
Lecture 14. Chapter 8-1
Lecture 14 Fatigue & Creep in Engineering Materials (Chapter 8) Chapter 8-1 Fatigue Fatigue = failure under applied cyclic stress. specimen compression on top bearing bearing motor counter flex coupling
Evaluation of the Susceptibility of Simulated Welds In HSLA-100 and HY-100 Steels to Hydrogen Induced Cracking
Evaluation of the Susceptibility of Simulated Welds In HSLA-100 and HY-100 Steels to Hydrogen Induced Cracking R. E. Ricker, M. R. Stoudt, and D. J. Pitchure Materials Performance Group Metallurgy Division
Experiment: Crystal Structure Analysis in Engineering Materials
Experiment: Crystal Structure Analysis in Engineering Materials Objective The purpose of this experiment is to introduce students to the use of X-ray diffraction techniques for investigating various types
x100 A o Percent cold work = %CW = A o A d Yield Stress Work Hardening Why? Cell Structures Pattern Formation
Work Hardening Dislocations interact with each other and assume configurations that restrict the movement of other dislocations. As the dislocation density increases there is an increase in the flow stress
Heat Treatment of Steel
Heat Treatment of Steel Steels can be heat treated to produce a great variety of microstructures and properties. Generally, heat treatment uses phase transformation during heating and cooling to change
Fatigue. 3. Final fracture (rough zone) 1. Fatigue origin. 2. Beach marks (velvety zone)
Fatigue Term fatigue introduced by Poncelet (France) 1839 progressive fracture is more descriptive 1. Minute crack at critical area of high local stress (geometric stress raiser, flaws, preexisting cracks)
LECTURE SUMMARY September 30th 2009
LECTURE SUMMARY September 30 th 2009 Key Lecture Topics Crystal Structures in Relation to Slip Systems Resolved Shear Stress Using a Stereographic Projection to Determine the Active Slip System Slip Planes
Material Deformations. Academic Resource Center
Material Deformations Academic Resource Center Agenda Origin of deformations Deformations & dislocations Dislocation motion Slip systems Stresses involved with deformation Deformation by twinning Origin
Lecture 18 Strain Hardening And Recrystallization
-138- Lecture 18 Strain Hardening And Recrystallization Strain Hardening We have previously seen that the flow stress (the stress necessary to produce a certain plastic strain rate) increases with increasing
CH 6: Fatigue Failure Resulting from Variable Loading
CH 6: Fatigue Failure Resulting from Variable Loading Some machine elements are subjected to static loads and for such elements static failure theories are used to predict failure (yielding or fracture).
FATIGUE BEHAVIOUR ANALYSIS OF DIFFERENTLY HEAT TREATED MEDIUM CARBON STEEL. Master of Technology (Res.) Metallurgical and Materials Engineering
FATIGUE BEHAVIOUR ANALYSIS OF DIFFERENTLY HEAT TREATED MEDIUM CARBON STEEL A THESIS SUBMITTED IN PARTIAL FULFILLMENT OF THE REQUIREMENTS FOR THE DEGREE OF Master of Technology (Res.) in Metallurgical and
Concepts of Stress and Strain
CHAPTER 6 MECHANICAL PROPERTIES OF METALS PROBLEM SOLUTIONS Concepts of Stress and Strain 6.4 A cylindrical specimen of a titanium alloy having an elastic modulus of 107 GPa (15.5 10 6 psi) and an original
Lösungen Übung Verformung
Lösungen Übung Verformung 1. (a) What is the meaning of T G? (b) To which materials does it apply? (c) What effect does it have on the toughness and on the stress- strain diagram? 2. Name the four main
PROPERTIES OF MATERIALS
1 PROPERTIES OF MATERIALS 1.1 PROPERTIES OF MATERIALS Different materials possess different properties in varying degree and therefore behave in different ways under given conditions. These properties
Lecture 19: Eutectoid Transformation in Steels: a typical case of Cellular
Lecture 19: Eutectoid Transformation in Steels: a typical case of Cellular Precipitation Today s topics Understanding of Cellular transformation (or precipitation): when applied to phase transformation
Objective To conduct Charpy V-notch impact test and determine the ductile-brittle transition temperature of steels.
IMPACT TESTING Objective To conduct Charpy V-notch impact test and determine the ductile-brittle transition temperature of steels. Equipment Coolants Standard Charpy V-Notched Test specimens Impact tester
Chapter Outline. Mechanical Properties of Metals How do metals respond to external loads?
Mechanical Properties of Metals How do metals respond to external loads? Stress and Strain Tension Compression Shear Torsion Elastic deformation Plastic Deformation Yield Strength Tensile Strength Ductility
NOTCHES AND THEIR EFFECTS. Ali Fatemi - University of Toledo All Rights Reserved Chapter 7 Notches and Their Effects 1
NOTCHES AND THEIR EFFECTS Ali Fatemi - University of Toledo All Rights Reserved Chapter 7 Notches and Their Effects 1 CHAPTER OUTLINE Background Stress/Strain Concentrations S-N Approach for Notched Members
Defects Introduction. Bonding + Structure + Defects. Properties
Defects Introduction Bonding + Structure + Defects Properties The processing determines the defects Composition Bonding type Structure of Crystalline Processing factors Defects Microstructure Types of
Alloys & Their Phase Diagrams
Alloys & Their Phase Diagrams Objectives of the class Gibbs phase rule Introduction to phase diagram Practice phase diagram Lever rule Important Observation: One question in the midterm Consider the Earth
MSE 528 - PRECIPITATION HARDENING IN 7075 ALUMINUM ALLOY
MSE 528 - PRECIPITATION HARDENING IN 7075 ALUMINUM ALLOY Objective To study the time and temperature variations in the hardness and electrical conductivity of Al-Zn-Mg-Cu high strength alloy on isothermal
STRAIN-LIFE (e -N) APPROACH
CYCLIC DEFORMATION & STRAIN-LIFE (e -N) APPROACH MONOTONIC TENSION TEST AND STRESS-STRAIN BEHAVIOR STRAIN-CONTROLLED TEST METHODS CYCLIC DEFORMATION AND STRESS-STRAIN BEHAVIOR STRAIN-BASED APPROACH TO
FATIGUE TESTS AND STRESS-LIFE (S-N) APPROACH
FATIGUE TESTS AND STRESS-LIFE (S-N) APPROACH FATIGUE TESTING LOADING TEST MACHINES SPECIMENS STANDARDS STRESS-LIFE APPEROACH S-N CURVES MEAN STRESS EFFECTS ON S-N BEHAVIOR FACTORS INFLUENCING S-N BEHAVIOR
Heat Treatment of Aluminum Foundry Alloys. Fred Major Rio Tinto Alcan
Heat Treatment of Aluminum Foundry Alloys Fred Major Rio Tinto Alcan OUTLINE Basics of Heat Treatment (What is happening to the metal at each step). Atomic Structure of Aluminum Deformation Mechanisms
Ch. 4: Imperfections in Solids Part 1. Dr. Feras Fraige
Ch. 4: Imperfections in Solids Part 1 Dr. Feras Fraige Outline Defects in Solids 0D, Point defects vacancies Interstitials impurities, weight and atomic composition 1D, Dislocations edge screw 2D, Grain
Figure 1: Typical S-N Curves
Stress-Life Diagram (S-N Diagram) The basis of the Stress-Life method is the Wohler S-N diagram, shown schematically for two materials in Figure 1. The S-N diagram plots nominal stress amplitude S versus
Lecture: 33. Solidification of Weld Metal
Lecture: 33 Solidification of Weld Metal This chapter presents common solidification mechanisms observed in weld metal and different modes of solidification. Influence of welding speed and heat input on
Size effects. Lecture 6 OUTLINE
Size effects 1 MTX9100 Nanomaterials Lecture 6 OUTLINE -Why does size influence the material s properties? -How does size influence the material s performance? -Why are properties of nanoscale objects
Multiaxial Fatigue. Professor Darrell Socie. 2008-2014 Darrell Socie, All Rights Reserved
Multiaxial Fatigue Professor Darrell Socie 2008-2014 Darrell Socie, All Rights Reserved Outline Stresses around holes Crack Nucleation Crack Growth MultiaxialFatigue 2008-2014 Darrell Socie, All Rights
Introduction to Materials Science, Chapter 9, Phase Diagrams. Phase Diagrams. University of Tennessee, Dept. of Materials Science and Engineering 1
Phase Diagrams University of Tennessee, Dept. of Materials Science and Engineering 1 Chapter Outline: Phase Diagrams Microstructure and Phase Transformations in Multicomponent Systems Definitions and basic
Dislocation Plasticity: Overview
Dislocation Plasticity: Overview 1. DISLOCATIONS AND PLASTIC DEFORMATION An arbitrary deformation of a material can always be described as the sum of a change in volume and a change in shape at constant
INFLUENCE OF THERMOMECHANICAL TREATMENT ON THE STEEL C45 FATIGUE PROPERTIES
CO-MAT-TECH 2005 TRNAVA, 20-21 October 2005 INFLUENCE OF THERMOMECHANICAL TREATMENT ON THE STEEL C45 FATIGUE PROPERTIES Jiří MALINA 1+2, Hana STANKOVÁ 1+2, Jaroslav DRNEK 3, Zbyšek NOVÝ 3, Bohuslav MAŠEK
EFFECT OF SEVERE PLASTIC DEFORMATION ON STRUCTURE AND PROPERTIES OF AUSTENITIC AISI 316 GRADE STEEL
EFFECT OF SEVERE PLASTIC DEFORMATION ON STRUCTURE AND PROPERTIES OF AUSTENITIC AISI 316 GRADE STEEL Ladislav KANDER a, Miroslav GREGER b a MATERIÁLOVÝ A METALURGICKÝ VÝZKUM, s.r.o., Ostrava, Czech Republic,
Chapter Outline. Diffusion - how do atoms move through solids?
Chapter Outline iffusion - how do atoms move through solids? iffusion mechanisms Vacancy diffusion Interstitial diffusion Impurities The mathematics of diffusion Steady-state diffusion (Fick s first law)
M n = (DP)m = (25,000)(104.14 g/mol) = 2.60! 10 6 g/mol
14.4 (a) Compute the repeat unit molecular weight of polystyrene. (b) Compute the number-average molecular weight for a polystyrene for which the degree of polymerization is 25,000. (a) The repeat unit
Austenitic Stainless Steels
Copyright 2008 ASM International. All rights reserved. Stainless Steels for Design Engineers (#05231G) www.asminternational.org CHAPTER 6 Austenitic Stainless Steels Summary AUSTENITIC STAINLESS STEELS
Effects of Sulfur Level and Anisotropy of Sulfide Inclusions on Tensile, Impact, and Fatigue Properties of SAE 4140 Steel
Paper 28-1-434 Effects of Sulfur Level and Anisotropy of Sulfide Inclusions on Tensile, Impact, and Fatigue Properties of SAE 414 Steel Copyright 28 SAE International Nisha Cyril and Ali Fatemi The University
Appendice Caratteristiche Dettagliate dei Materiali Utilizzati
Appendice Caratteristiche Dettagliate dei Materiali Utilizzati A.1 Materiale AISI 9840 UNI 38NiCrMo4 AISI 9840 Steel, 650 C (1200 F) temper, 25 mm (1 in.) round Material Notes: Quenched, 540 C temper,
Heat Treatment of Steels : Spheroidize annealing. Heat Treatment of Steels : Normalizing
Heat Treatment of Steels :Recrystallization annealing The carbon and alloy steels were treated at a temperature of about 700 C, which is about 20 C below the eutectoid temperature. The holding time should
Short and Large Crack, Mixed-Mode Fatigue-Crack Growth Thresholds in Ti-6Al-4V 1
Short and Large Crack, Mixed-Mode Fatigue-Crack Growth Thresholds in Ti-6Al-4V 1 Mr. R. K. Nalla, Dr. J. P. Campbell and Professor R. O. Ritchie 2 Department of Materials Science and Engineering University
Microscopy and Nanoindentation. Combining Orientation Imaging. to investigate localized. deformation behaviour. Felix Reinauer
Combining Orientation Imaging Microscopy and Nanoindentation to investigate localized deformation behaviour Felix Reinauer René de Kloe Matt Nowell Introduction Anisotropy in crystalline materials Presentation
EUROLAB 25 years. The role of metrology and testing to characterize materials and products. EUROLAB 25th Anniversary Seminar
EUROLAB 25 years The role of metrology and testing to characterize materials and products April 9, 2015, Odense Danmark 1 Origin of Conformity Assessment The New Approach for the European Economic Community
CORRELATION BETWEEN HARDNESS AND TENSILE PROPERTIES IN ULTRA-HIGH STRENGTH DUAL PHASE STEELS SHORT COMMUNICATION
155 CORRELATION BETWEEN HARDNESS AND TENSILE PROPERTIES IN ULTRA-HIGH STRENGTH DUAL PHASE STEELS SHORT COMMUNICATION Martin Gaško 1,*, Gejza Rosenberg 1 1 Institute of materials research, Slovak Academy
Mechanical Properties and Fracture Analysis of Glass. David Dutt Chromaglass, Inc.
Mechanical Properties and Fracture Analysis of Glass David Dutt Chromaglass, Inc. IES ALC Williamsburg 2006 2 IES ALC Williamsburg 2006 3 Outline The Ideal The Practical The Reality IES ALC Williamsburg
Phase Transformations in Metals and Alloys
Phase Transformations in Metals and Alloys THIRD EDITION DAVID A. PORTER, KENNETH E. EASTERLING, and MOHAMED Y. SHERIF ( г йс) CRC Press ^ ^ ) Taylor & Francis Group Boca Raton London New York CRC Press
Structural Integrity Analysis
Structural Integrity Analysis 1. STRESS CONCENTRATION Igor Kokcharov 1.1 STRESSES AND CONCENTRATORS 1.1.1 Stress An applied external force F causes inner forces in the carrying structure. Inner forces
9. TIME DEPENDENT BEHAVIOUR: CYCLIC FATIGUE
9. TIME DEPENDENT BEHAVIOUR: CYCLIC FATIGUE A machine part or structure will, if improperly designed and subjected to a repeated reversal or removal of an applied load, fail at a stress much lower than
2017A ALUMINUM ALLOY IN DIFFERENT HEAT TREATMENT CONDITIONS
Acta Metallurgica Slovaca, Vol. 18, 2012, No. 2-3, p. 82-91 82 2017A ALUMINUM ALLOY IN DIFFERENT HEAT TREATMENT CONDITIONS K. Mroczka 1)*, A. Wójcicka 1), P. Kurtyka 1) 1) Department of Technology and
ME349 Engineering Design Projects
ME349 Engineering Design Projects Introduction to Materials Selection The Material Selection Problem Design of an engineering component involves three interrelated problems: (i) selecting a material, (ii)
Objectives/Introduction Extraction of zinc Physical properties of zinc Zinc casting alloys Wrought zinc alloys Engineering design with zinc alloys
Lecture 7 Zinc and its alloys Subjects of interest Objectives/Introduction Extraction of zinc Physical properties of zinc Zinc casting alloys Wrought zinc alloys Engineering design with zinc alloys Objectives
CONSOLIDATION AND HIGH STRAIN RATE MECHANICAL BEHAVIOR OF NANOCRYSTALLINE TANTALUM POWDER
CONSOLIDATION AND HIGH STRAIN RATE MECHANICAL BEHAVIOR OF NANOCRYSTALLINE TANTALUM POWDER Sang H. Yoo, T.S. Sudarshan, Krupa Sethuram Materials Modification Inc, 2929-P1 Eskridge Rd, Fairfax, VA, 22031
Numerical Analysis of Independent Wire Strand Core (IWSC) Wire Rope
Numerical Analysis of Independent Wire Strand Core (IWSC) Wire Rope Rakesh Sidharthan 1 Gnanavel B K 2 Assistant professor Mechanical, Department Professor, Mechanical Department, Gojan engineering college,
RESIDUAL STRESSES AND THEIR EFFECTS ON FATIGUE RESISTANCE
RESIDUAL STRESSES AND THEIR EFFECTS ON FATIGUE RESISTANCE Ali Fatemi-University of Toledo All Rights Reserved Chapter 8 Residual Stresses & Their Effects 1 RESIDUAL STRESSES AND THEIR EFFECTS ON FATIGUE
Deflection Calculation of RC Beams: Finite Element Software Versus Design Code Methods
Deflection Calculation of RC Beams: Finite Element Software Versus Design Code Methods G. Kaklauskas, Vilnius Gediminas Technical University, 1223 Vilnius, Lithuania ([email protected]) V.
Experiment: Heat Treatment - Quenching & Tempering
Experiment: Heat Treatment - Quenching & Tempering Objectives 1) To investigate the conventional heat treatment procedures, such as quenching and annealing, used to alter the properties of steels. SAE
Materials Sciences. Dr.-Ing. Norbert Hort [email protected]. International Masters Programme in Biomedical Engineering
Materials Sciences International Masters Programme in Biomedical Engineering Magnesium Innovations Center (MagIC) GKSS Forschungszentrum Geesthacht GmbH Dr.-Ing. Norbert Hort [email protected] Contents
Fatigue Performance Evaluation of Forged Steel versus Ductile Cast Iron Crankshaft: A Comparative Study (EXECUTIVE SUMMARY)
Fatigue Performance Evaluation of Forged Steel versus Ductile Cast Iron Crankshaft: A Comparative Study (EXECUTIVE SUMMARY) Ali Fatemi, Jonathan Williams and Farzin Montazersadgh Professor and Graduate
CERAMICS: Properties 2
CERAMICS: Properties 2 (Brittle Fracture Analysis) S.C. BAYNE, 1 J.Y. Thompson 2 1 University of Michigan School of Dentistry, Ann Arbor, MI 48109-1078 [email protected] 2 Nova Southeastern College of Dental
Application of Web-Based Bar Fatigue Database. Database Development
Application of Web-Based Bar Fatigue Database Database Development Thomas G. Oakwood Bar Steel Fatigue Database- Objectives Develop a strain-controlled fatigue database for carbon and low alloy bar steels
Der Einfluss thermophysikalischer Daten auf die numerische Simulation von Gießprozessen
Der Einfluss thermophysikalischer Daten auf die numerische Simulation von Gießprozessen Tagung des Arbeitskreises Thermophysik, 4. 5.3.2010 Karlsruhe, Deutschland E. Kaschnitz Österreichisches Gießerei-Institut
EFFECTS OF STRAIN RATE ON WORK HARDENING OF HSLA AND Ti-IF STEELS
METALLURGY AND FOUNDRY ENGINEERING Vol. 32, 2006, No. 1 Monika Stefañska-K¹dziela *, Janusz Majta **, Krzysztof Muszka *** EFFECTS OF STRAIN RATE ON WORK HARDENING OF HSLA AND Ti-IF STEELS Notation: A
Types of Strain. Engineering Strain: e = l l o. Shear Strain: γ = a b
Types of Strain l a g Engineering Strain: l o l o l b e = l l o l o (a) (b) (c) Shear Strain: FIGURE 2.1 Types of strain. (a) Tensile. (b) Compressive. (c) Shear. All deformation processes in manufacturing
Surface Treatments. Corrosion Protective coatings for harsh environments (catalytic converters, electrochemical cells )
Surface Treatments Applications Biomedical (biocompatible coatings on implants, drug coatings for sustained release ) Mechanical Tribological friction and wear (tool steels, implants ) Fatigue minimize
Investigation of Titanium α Plates by EBSD Analysis
Investigation of Titanium α Plates by EBSD Analysis Master Thesis Arjen Kamp June 2007 Materials Science and Engineering Faculty 3mE Supervisors: Stefan van Bohemen Jilt Sietsma Roumen Petrov Investigation
INFLUENCE OF Cr, Mn AND Mo ON STRUCTURE AND PROPERTIES OF V MICROALLOYED MEDIUM CARBON FORGING STEELS
Association of Metallurgical Engineers of Serbia AMES Scientific paper UDC: 669.15'26'74'28-194 INFLUENCE OF Cr, Mn AND Mo ON STRUCTURE AND PROPERTIES OF V MICROALLOYED MEDIUM CARBON FORGING STEELS Nenad
BINARY SYSTEMS. Definition of Composition: Atomic (molar) fraction. Atomic percent. Mass fraction. Mass percent (weight percent)
BINARY SYSTEMS Definition of Composition: Atomic (molar) fraction Atomic percent Mass fraction Mass percent (weight percent) na =, x i n = A i i i Weight percent mainly in industry! x at % A = x 100 A
Uniaxial Tension and Compression Testing of Materials. Nikita Khlystov Daniel Lizardo Keisuke Matsushita Jennie Zheng
Uniaxial Tension and Compression Testing of Materials Nikita Khlystov Daniel Lizardo Keisuke Matsushita Jennie Zheng 3.032 Lab Report September 25, 2013 I. Introduction Understanding material mechanics
Massachusetts Institute of Technology Department of Mechanical Engineering Cambridge, MA 02139
Massachusetts Institute of Technology Department of Mechanical Engineering Cambridge, MA 02139 2.002 Mechanics and Materials II Spring 2004 Laboratory Module No. 5 Heat Treatment of Plain Carbon and Low
Dislocation theory. Subjects of interest
Chapter 5 Dislocation theory Subjects of interest Introduction/Objectives Observation of dislocation Burgers vector and the dislocation loop Dislocation in the FCC, HCP and BCC lattice Stress fields and
Hardened Concrete. Lecture No. 14
Hardened Concrete Lecture No. 14 Strength of Concrete Strength of concrete is commonly considered its most valuable property, although in many practical cases, other characteristics, such as durability
ORIENTATION CHARACTERISTICS OF THE MICROSTRUCTURE OF MATERIALS
ORIENTATION CHARACTERISTICS OF THE MICROSTRUCTURE OF MATERIALS K. Sztwiertnia Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 25 Reymonta St., 30-059 Krakow, Poland MMN 2009
σ y ( ε f, σ f ) ( ε f
Typical stress-strain curves for mild steel and aluminum alloy from tensile tests L L( 1 + ε) A = --- A u u 0 1 E l mild steel fracture u ( ε f, f ) ( ε f, f ) ε 0 ε 0.2 = 0.002 aluminum alloy fracture
EFFECTS OF SHOT-PEENING ON HIGH CYCLE FRETTING FATIGUE BEHAVIOR OF Ti-6Al-4V
JOURNAL OF AERONAUTICS AND SPACE TECHNOLOGIES JANUARY 2003 VOLUME 1 NUMBER 1 (51-64) EFFECTS OF SHOT-PEENING ON HIGH CYCLE FRETTING FATIGUE BEHAVIOR OF Ti-6Al-4V Halil Ibrahim Air Services Schools and
Experimental assessment of concrete damage due to exposure to high temperature and efficacy of the repair system
MATEC Web of Conferences 6, 06002 (2013) DOI: 10.1051/matecconf/20130606002 C Owned by the authors, published by EDP Sciences, 2013 Experimental assessment of concrete damage due to exposure to high temperature
METU DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING
METU DEPARTMENT OF METALLURGICAL AND MATERIALS ENGINEERING Met E 206 MATERIALS LABORATORY EXPERIMENT 1 Prof. Dr. Rıza GÜRBÜZ Res. Assist. Gül ÇEVİK (Room: B-306) INTRODUCTION TENSION TEST Mechanical testing
Chapter 8. Phase Diagrams
Phase Diagrams A phase in a material is a region that differ in its microstructure and or composition from another region Al Al 2 CuMg H 2 O(solid, ice) in H 2 O (liquid) 2 phases homogeneous in crystal
In order to solve this problem it is first necessary to use Equation 5.5: x 2 Dt. = 1 erf. = 1.30, and x = 2 mm = 2 10-3 m. Thus,
5.3 (a) Compare interstitial and vacancy atomic mechanisms for diffusion. (b) Cite two reasons why interstitial diffusion is normally more rapid than vacancy diffusion. Solution (a) With vacancy diffusion,
MATERIALS AND PROCESS IN MANUFACTURING Ninth Edition
Solutions Manual to Accompany MATERIALS AND PROCESS IN MANUFACTURING Ninth Edition E. Paul DeGarmo J T. Black Ronald A. Kohser Solutions Manual by Barney E. Klamecki Copyright 2003 John Wiley & Sons, Inc
Copper Alloys for Injection, Thermoform and Blow Molds
Copper Alloys for Injection, Thermoform and Blow Molds by Robert Kusner Manager of Technical Services June 2015 Today s Agenda History of copper mold alloys Why use copper? Which copper alloy should I
Mechanical Design Concepts for Non-Mechanical Engineers
Mechanical Design Concepts for Non-Mechanical Engineers By Steve Mackay EIT Micro-Course Series Every two weeks we present a 35 to 45 minute interactive course Practical, useful with Q & A throughout PID