9ṭh PROCEEDINGS of the INTERNATIONAL METALLURGY and MATERIALS CONGRESS ) ULUSLARARASI METALURji ve MALZEME KONGRESl BlLDlRlLER KiTABI

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1 ISSN ṭh PROCEEDINGS of the INTERNATIONAL METALLURGY and MATERIALS CONGRESS ) ULUSLARARASI METALURji ve MALZEME KONGRESl BlLDlRlLER KiTABI VOLUME D / ClLTII JB/TIB Hannover JUNE 1997 / HAZlRAN 1997 istanbul EXHIBITION PALACE / ISTANBUL SERGl SARA YI ISTANBUL, TURKIYE SUPPORTED by/destekleyen KURULUSLAR TUBlTAK, SARKUYSAN, lgda, FAF METAL, FMC-NUROL, EKlNCtLER DI TtC.A.., golakofilu METALURji S.T.A.. Union of Chambers ofturkish Engineers and Architects CHAMBER OF METALLURGICAL ENGINEERS Tilrk Miihendis ve Mimar Odalart Birligi METALURJIMUHENDlSLERl ODASI Publication No. / Yaynn No. 33

2 Content of - VOLUME II / CiLTII - Igindekiler COMMERCIAL PAPERS/ TlCARlBiLDiRlLER New concepts in production of specialty steels in bars and coils 829 Czel celiklerin cubuk ve kangal seklinde uretimine yonelik yeni kavramlar L MASSIMO (Danieli) Twin electrode DC powered EAF among the latest improvements in DANIELI Electric arc furnace technology 845 Ikiz elektrotlu DA EAF: DANIELI Elektrik ark firm teknolojisindeki en son gelismelerden biri. K. BERGMAN (Danieli) QUALITY ASSURANCE IKAUTE QOVENCE Gunumijzde kalite ve dnemi 865 Current quality concepts and their importance C. ENSARl Ddkumhanelerde "Proses FMEA" uygulamasi uzerine bir calisma 869 A research on the application of FMEA process in foundries S.SADiOGLU, H. AVCI Accreditation of testing laboratories: preconditions, procedures, experiences, systems, mutual recognition 875 Test laboratuvarlannm akreditasyonu J. THIELE Kalite arac ve tekniklerinin uretim sureci ile butunlestirilmesi ve iirun kalitesine katkismin degerlendirilmesi 879 Integration of quality tools and techniques with production processes and evaluation of this contribution to the product quality 6. KELES, L KOSEOGLU, U. DEMlRLER, Surecler icin basitlestirilmis YOSi ve KIK uygulamasi 885 Simplifed FMEA and QFD applications for processes A.ESIN IX

3 NONDESTRUCTIVE TESTING / TAHRlBA TSIZ MUA YENE Endiistrlde tahribatsiz muayene uygulamalan 891 Industrial applications of NDT techniques A.TOPUZ Tahribatsiz muayene personelinin vasiflandinlmasi ve sertifikalandinlmasi 897 Qualification and certification of NDT personnel N. MAHMUTYAZICIOGLU, C.H. GUR Radyografik tekniklerle korozyonlu borularda cidar kahnhgi olciimu 903 Wall thickness measurement of corroded pipes by radiographic methods. EKiNCl, N. BA, A. YILDIRIM Hasarsiz muayene uygulamalarinin iirun kalitesine katkismin dikisll boru uretimi drneginde degerlendirilmesi 909 Evaluation of the contribution of NDT applications to the product quality of welded pipe production U. DEMlRLER, Y. TAPTIK, 0. AKIN, G. PONSCHAB, E. AKGCILLO, E. HELVACI Nondestructive testing of Nitrocarburizing - in situ - ex situ 915 Nitrokarburizasyonun -yerinde - disinda, hasarsiz muayenesi H.KLCIMPER - WESTKAMP, F. HOFFMANN, P. MAYR. WELDING TECHNOLOGY / KA YNAK TEKNOLOJlSi Endustriyel gelisim surecinde kaynagin dnemi veyeri 921 Importance & status of welding during industrial development K. TOLBENTQl Aluminyum malzemelerde kaynaklama islemine bagli sicak catlama egillmi 937 Hot-cracking susceptibility of Al-materials depending on the welding process C.BATIGUN Laser beam weldability of the material combination nodular cast iron (GGG40, GGG50, GGG60) - case hardening steel (16 MnCr 5) 943 Kuresel grafitli dokme demirin (GGG40.GGG50, GGG60) sementasyon?eligine (16MnCr5) laserle kaynawanabilirligi A, KARAASLAN, R. EBNER, E. BRANDSTATTER

4 Demir tozuhdan imal edilen parcalann genel yapi celigine serf lehimleme Me birlestirilmesi 951 Brazing of parts produced from iron powder to low-c steels B. GULENC, A. KURT, M. TURKER Universal plasma torch for metal cutting 957 Metal kesmede kullamlan universal plazma torcu M. MIHOVSKY, T. TZONEV, B. LUCHEVA MIG-MAG kaynaginda argon gazina oksijen ve CO2 ilavesinin kaynak metali mekanik ozelliklerine etkisinin arastinlmasi...: Investigation of effect of CO2 and 02 addition to Argon gas on mechanical properties of weld metal in MIG-MAG welding H. ATE, M. TURKER Real time observation of argon shielded GMAW arc by means of an optical system <. 971 Argon koruyucu altinda olusan GMAW arkinm optik bir sistem araciligi ile anmda gozlenmesi A. ANKARA, O. OZTURK peliklerde bilgisayar destekli karbon esdegerliliginin ve on isitma sicakligimn belirlenmesi 977 Computer determination of carbon equivalence and preheating temperature of steel welds O. GUVEN Kalite guvencesi cercevesinde kaynak muhendisi ve kaynakci egitimi 983 Training of welding engineer and welders in scope of quality assurance Z.FILIZ NONFERROUS / DEMlR Dl$l Analysis and assessment of metallurgical processes by thermodynamic modeling 993 Metalurjik sureclerin lermodinamik modelleme ile analizi ve degerlendirilmesi I. BARIN! Modelling of conductivity and viscosity of copper - nickel smelting slags i using neural nets 1001 I Noral aglar kullanilarak bakir-nikel izabe curuflannin iletkenliginin ve i viskositesinin modellenmesi s R. H. ERIC, A. HEJJA, M. REUTER XI

5 Soy metal alasimlarimn elektrolitik aynmi 1009 Electrolytic separation of valuable metal alloys S. GURMEN, S. TlMUR, i. DUMAN Elektrik ark firini baca tozlanmn pirometalurjik degerlendirilmesi 1015 Pyrometallurgical recycling of EAF flue dusts C. F. ARISOY, M.K. E EN Technology and devices for processing the waste acid batteries 1021 Atik asit pillerinin islenmesinde kullamlan teknolojiler ve araclar G. A. HARALAMPIEV, N.K.LYAKOV, G.P. GIRDJEV Demirdisi metallerin (Cu, Al, Pb, Zn) uretimi, tiiketimi ve ticareti 1025 The production, consumption and trade of nonferrous metals (Cu, Al, Pb, Zn) R. KONT Metal iyonlarimn kursun bazh anotlar uzerindeki oksijen fazla voltajina etkisi 1099 Effect of metal ions on the oxygen overpotential of the lead-base anodes S. TiMUR, S. GURMEN, I. DUMAN Bakir curuflanndan uretilen metalik mattaki degerin selektif olarak kazamlmasi uzerine bir calisma 1105 A process proposal for the selective recovery of metallic value from copper slag O. ADDEMiR, E. AQMA, H. SESlGUR, C. OKTAYBA, G. ORHAN Technological aspects of wastes from coal industry utilization in non-ferrous metallurgy...' 1111 Demirdisi metalurjisinde komur endustri atiklannm kullanilmasinin teknolojik boyutlan V.P. STEFANOVA, B.St. STEFANOV Nonferrous alloys based on copper with superior physical and mechanical properties obtained by microalloying 1117 Mikroalasimlama ile elde edilen ustun fiziksel ve mekanik dzelliklere sahip bakir esash demirdisi alasimlar M. VLAD, L MITOSERIU Aspects of phase equilibria and thermodynamics in the Fe-Ti-O system at C and 1600-C,1123 Fe-Ti-0 sisteminin 1500 C ve 1600 C sicakhgindaki faz denge ve termodinamigi J. PESL, R. H. ERIQ XII

6 Mugla kromitierinden alkali fuzyon yontemiyie kromat Qretimi 1135 Production of sodium chromate from Mugla chromite concentrates by alkali - fusion method K. YILDIZ, I.A. SENGiL Mollbden sulfurun kavrulmasi sirasinda olusan ara oksitlenme reaksiyonunun kinetigi Oxidation kinetics of the intermediate product produced during roasting of MoS 2-1 C. KAHRUMAN, i. YUSUFOGLU, E. OKTAY Molibden sulfurun kavrulmasi sirasinda olusan ara oksitlenme reaksiyonunun kinetigi Oxidation kinetics of the intermediate product produced during roasting of MoS 2-2 C. KAHRUMAN,I. YUSUFOGLU, E. OKTAY Pfrometalurjik sureclerde kopuk ve emuisiyoniarin olusumu ve karariiiigi 1153 Formation and stability of foams and emulsions in pyrometallurgical processes E. OKTAY, C. KAHRUMAN, i. YUSUFOGLU Slags and Electroslag remelting processes for chemical reactive elements protection in Ni base superalloys 1159 Ni esasli superalasimlarda kimyasal reaktif elementlerin korunmasi icin curuf ve elektrocuruf ergitme surecleri D. DAISA, M.C. BUNESCU, F. DAISA, V. GEANTA Kursun anotlarm elektrokimyasal ve mekanik ozelliklerine alasim elementlerinin etkisi 1165 Effect of alloying elements on the electrochemical and mechanical properties of lead-anodes S. TlMUR, S. GURMEN, C. ARSLAN, I. DUMAN Manganez cozeltilerinden demirin uzaklastinlmasi ve proses degiskenlerinin etiidii ; 1171 Removal of iron from manganese solution and investigation of process variables M. QINARLI, C. ARSLAN, H. SESlGUR Aluminotermik yontemle metalik krom uretimi Metallic chromium production by aluminothermic method G. ORHAN, C. ARSLAN 117a Petrol Endiistrisinde kullamlan hidrojenasyon katalizor atiklanndan molibdenin alkali fuzyon yontemi ile geri kazamlmasi» Recovery of molibdenum from hydrogenation catalysts used in petroleum refineries by alkali fusion method C. OKTAYBAS, E. ACMA, O ADDEMlR

7 Tungsten konstrelerinden aluminotermik proses ile ferrotungsten Qretimi 1191 Production of tungsten from tungsten concentrates by aluminothermic process 0. YUCEL, M.A. OZQELEBl, O. ADDEMiR Determination of the aerodynamic parameters of the recirculation zones in the reaction shaft of the flash smelting furnace for sulphide raw materials 1199 Sulfur hammaddeler icin kullanilan flas izabe firinlannin reaksiyon saftmdaki resirkulasyon zonlannin aerodinamik parametrelerinin belirlenmesi B.S. STEFANOV, D.K. TSOCHNOVA, V.P. STEFANOVA Dynamic characteristics of heat transfer in fluidized bed 1205 Akiskan yataklarda ISI iletiminin dinamik karakteristikleri R.D. STANEV, N.S. AKHMAKOV, E.G. MICHAILOV, V.I. PETKOV SiyanurlQ cozeltilerden gumusun aktif karbona adsorbsiyonu sartlanmn incelenmesi 1211 I nvestigation of silver adsorption from silver cyanide solutions ont^ the activated carbon N. YOSMA, H. SESiGUR, E. ACMA Paslanmaz celik katot Qzerinde toplanan elektrolltik bakira yuzey aktiflestiricilerin etkisi 1217 Effects of surface reactants on the electrolytic copper deposited on stainless steel cathodes S. GURMEN, S. TiMUR, B. QALIS. KAN, I. DUMAN Milas G6bekdagi boksitlerinin sulfat asidindeki cdzunurlugunun incelenmesi 1223 Investigation of solubility of Milas - Gdbekdagi bauxites in sulfuric acid M. GULFEN, A. ALP, A.O.AYDIN Cayeli 9inko sulfur konsantresinin oksitleyici basinclici 1231 Oxidative pressure leaching of Qayeli zinc-sulphide concentrate N. GURESiN, Y. TOPKAYA, A. GEVECi Determination of instability constant of lead complexes with diethylenetriamine and ethylenediamlne by the method of dissolving 1237 N.K.LYAKOV, G.A. HARALAMPIEV, M.J.TSANEVA, G.P. GIRDJEV Specific heat and the phase diagram of UNI 2 Si H. SALAMATI, J. AMIGHIAN XIV

8 Manganase extraction & concentration with Dl - (p - Napthol) - monosulphide MITOSERIU, M. VLAD, L.C. MITOSERIU Alkali katkih Mugla boksitlerinden AI 2 O 3 estraksiyon kosullarimn arastinlmasi 1255 Investigation of the extraction of AI 2 O 3 from Mugla bauxites A. ALP, A.O. AYDIN MgO igerigi yuksek kromit cevherinin kok tozu ile indirgenmesinin kinetigi 1261 Kinetic aspects of the reduction of chromite ore with high MgO ratios by coke fines M.K. SESEN, G. KARSLI (U, Pu) 02 ± x'de oksijenin difuzyonunun incelenmesi 1267 Investigation of oxygen diffusion in (U, Pu) 02 ± x A. S. BAYOGLU MATERIALS CHARACTERIZATION / MALZEME KARAKTERiZASYONU Yuksek hiz takim9eliklerinde malzeme karakterizasyonu 1275 Materials characterization of high-speed steels S. KARAGOZ Cu-Zn-AI sekil beilekli alasimlann Ciretim ve karakterizasyonu 1293 Production and characterization of Cu - Zn - Al shape memory alloys G. SARANLI, Y.Z. KARABAY, S. BOR Fe78B13Si9 metalik cammda domen yapilari 1299 Domain structures in the Fe78B13Si9 metallic glass Y. BlROL, E. ATAR Basin9li filtrasyon yontemiyie uretilmis Cu-C kompozitlerin tribolojik davranismin karakterizasyonu 1305 Characterization of tribologic behaviour of Cu - C composites produced by pressure infiltration G. GOLLER, D.P.KOTTY, M. SINGH, S. TEWARI, A. TEKiN High porosity permeable cellular material based on silicon carbide 1311 Silisyum karbur esasli 90k gozenekli ge9irgen hiicresel malzeme V. N. ANTSIFEROV, N. M. AVDEEVA, A. M. MAKAROV XV

9 Celik i9i metalik olmayan kalintilann teknolojik ozelliklere etkisinin mikroyapisal karakterizasyon ile belirlenmesi 1317 Determination of the effect of non-metallic inclusions in steels on the technological properties M. QOL, M. YILMAZ, S. KARAGOZ AI-Cu-xLi alasimlannda mikroyapi ve faz ozellikleri 1323 Microstructure and phase properties in Al - Cu - xli alloys A. ALTMISOGLU, H. gakir, A. CEYLAN, g. KESTiR Effect of manganese content on the formation of intermetallic layer at Fe-AI interface 1329 Fe-AI arayuzeylerinde intermetalik katman olusumuna manganez igeriginin etkisi F. AGDAS, M.V. AKDENlZ, A.O. MEKHRABOV Mekanik alasimlanmis ve sicak isostatik sartlarda preslenmis nanokristal Ti-47.5AI-3Cr alasimimn C sicakhk arahginda ge9irimli elektron mikroskop karakterizasyonu ve tane buyume kinetigi 1335 TEM characterization and grain coarsening kinetics of fully dense nanocrystalline Ti - 47,5 Al - 3 Cr intermetallic alloy produced by mechanical alloying and hot isostatic pressing in the temperature regime of C M.L. OVEgOGLU, O.N. SENKOV, N. SRISUKHUMBOWORNCHAI, F.H. FROES Microstructural and microcompositional studies on Ag-clad 2223 superconducting ribbons 1341 Gumus giydirilmis 2223 superiletken seritlerde mikroyapisal ve mikrokimyasal calismalar M.C. BUNESCU, G. ALDICA, P. NITA Ultrasonik ve mekanik kanstirmayla fdkturulen toryum okzalattan elde edilen ThO 2 tozlanmn dzelliklerinin incelenmesi 1347 Investigation of the properties of ThO 2 powder obtained from the thorium oxalate precipitated by ultrasonic and mechanical mixing A. YAYLI, E. OKTAY, I. YUSUFOGLU, A. VAN Yuksek silisll elektrik seliklerinin Qretiminde hizli katilastirma uygulamasi 1353 Application of rapid solidification process on the production of electrical steels with high Si - content Y. BlROL, N. PARKAN, O. gakir XVI

10 Bakir esasli sekil beilekli alasimlarda mikroyapi incelemeleri 1359 Microstructural investigations on the Cu - based shape memory alloys E. TARHAN, S. BOR Monte Carlo study of temperature effect on Fe 3 AI based intermetallics 1365 Fe,AI esasli intermetallikler uzerinde sicakhgm etkisinin Monte Carlo yontemi ile incelenmesi M.M. ARER, A.O. MEKHRABOV, M.V. AKDENlZ Recent advances in magnesium alloys 1371 Magnezyum alasimlanndaki son gelismeler A. BUZAIANU, M. PETRESCU, M.C. BUNESCU, E. VASILE Characteristics and application of basalt product as substitutes for asbestos ones 1377 Asbest yerine basalt urunlerin kullamlma karakteristikleri ve uygulamalan B. BOYANOV, M. TONCHEV Korozyona dayamkh Fe-Mn-AI-C 9eliginde dokum mikroyapilannin karakterizasyonu 1383 Characterization of cast microstructures in the corrosion resistant Fe - Mn - Al - C steel A.S. AKKURT, 6.A. ATASOY, K. TULBENTgl Mekanik alasimlanmis ve sicak isostatik sartlarda preslenmis nanokristal Ti-47.5AI-3Cr alasimimn T=1200 C sicakligindaki isil islemi ve havada sogutulmasi sonucu olusan mikroyapisal degisimi 1391 Microstructural changes in the fully dense nanocrystalline Ti - 47,5 Al - 3 Cr intermetallic alloy produced by mechanical alloying and hot isostatic pressing as a result of heat treatment at 1200 C and cooling in air M.L 6VEgOGLU, O.N. SENKOV, N. SRISUKHUMBOWORNCHAI, FROES HEAT TREATMENT /ISIL ISLEM Turkiye'de isil islem sektoru ve diinyadaki gelismeler 1397 Heat treatment sector in Turkey and progresses in the world 6. YUCEL YQzeyi lazerle ergitilmis AIS eli ine uygulanan isil islemlerin dstenitin aynsmasma etkisi 1409 Effects of post heat treatment on the decomposition of austenite in the laser surface melted AIS11018 steel O.V.AKGI"IN A.S. AKKURT XVII

11 Yan-kati halde sekil verilmis Etial-24 dovme aluminyum alaf iminin yorulma ve yaslanma davramslan 1415 Mechanical and aging properties of the semi-solid forged ETIAL-24 wrought Al-alloy S. KIRTAY, A. TURKELi Levha dokiim teknigi ile uretilen AlFeSi alasimlannda homojenlestirme tavi denemeleri 1421 Homogenization studies on the Al - Fe - Si alloys produced by twin - roll casting Y. BiROL, H.K. ZEYTiN, O. gakir, O. ARISOY, S. AKKURT, S. SINMAZ, M. MANKIR Celige su verme if leminin bilgisayarda modellenmesi 1427 Computer modeling for quenching of steels C.H.GUR, A.E. TEKKAYA, T.OZTURK, W. SCHULER Yan-kati proseslerle uretilmis non-dendritik dovme aluminyum alasimlannda 9dzeltiye alma isil isleminin numerik modellenmesi 1433 Numerical modeling for the isothermal solution heat treatment following semi-solid processing of wrought Al-alloys A. TURKELi Yan-kati proseslerle uretilmis non-dendritik dovme aluminyum alasimlannda 96zeltiye alma isil islemi \g\n gelistirilmis analitik modeller 1439 New analytical models for the isothermal solution heat treatment following semi-solid processing of wrought Al-alloys A. TURKELi Structural and dimensional instabilities in rolling-bearing steels 1445 Rulman 9eliklerindeki yapisal ve boyutsal kararsizliklar I.I. STEFANESCU, C.I. GHEORGHIES Harmonic heating conditions 1451 Harmonik isitma sartlan AI.ZLATARSKI, Kr. TSANKOV, D. BOUHOV Influence of Molybdenum in austenitic stainless steels depending on heat treatment conditions 1457 Ostenitik paslanmaz celiklerde isil islem kosullanna bagh olarak molibdenin etkisi A. GHEORGHIU - DOBRE, S. CIUCA

12 CASTING / DOKUM Diinyada ve Turkiye'de dokum sektoriinun baslangici, bugunu ve gelecegi 1465 Begining, current status and future of the foundry sector in Turkey & in the world (TUDOKSADE) The economic and technical aspects for achieving total sand conservation 1497 Toplam kum tuketimini azaltmanin teknik ve ekonomik boyutlan D.W. BAKER, S.J. WILLAMS Kuresel grafitli dokme demirde termal analiz uygulamalan 1505 Application of thermal analysis on the ductile cast iron Y. GUNAY, C. DEMlR Hizli katilastinlmis AI-12Si ve AI-7.5Fe-1.5Mo-1Si alasimlarimn isil karariiiigi 1513 Thermal stability of rapidly solidified Al -12 Si and Al - 7,5 Fe -1,5 Mo -1 Si alloys Y. BlROL Computer simulation of metal feeding system in the direct production of thin strip of alloys by twin-roll casting 1519 Ince levha alasimlannin tevha dokum teknigi ile dogrudan uretiminde kullanilan metal besleyici sisteminin bilgisayar simulasyonu M. V. AKDENiZ, G. YILDIZBAYRAK, F. SUZEN The influence of convection on non-equilibrium solidification of silver germanium alloys 1525 Gumus germanyum alasimlannin dengesiz katilasmasina konveksiyonun etkisi D. VOJTECH, S. HOLECEK, C. BARTA, C. BARTA JR., G.OTTO, G. GORLER, K. WITTMAN, R. ROSTEL Process design for increased reliability in aluminum castings 1531 Aluminyum dokumler igin guvenirlilik arttinci sure? tasarimi M.TlRYAKiOGLU, J.CAMPBELL The effect of casting temperature on the microstructure and properties of high pressure die casting AZ91D magnesium alloy 1537 AZ91D magnezyum basm9li dokum alasiminda dokum sicakliginm mikroyapi ve dzellikler uzerindeki etkisi H. ROSENSON, Z. KOREN, M. BAMBERGER, E.AGHION XIX

13 Aktiflestirilmis bentonitin kolloidal ve reolojik dzellikleri Qzerine Li, Ca iyonlannin etkisi 1543 Effect of Lit-, Ca++ ions on the rheological and colloidal properties of the activated bentonite N. GUNGOR, A. ALEMDAR Bilgi tabanli sistemler kullamlarak malzeme se9imi ve aluminyum dokum i alasimlanna uygulanmasi 1549 Material selection using data base systems and its application on cast Al - alloys I. KOCABigAK, A. OZEL, G. KOCABigAK Silicon particle refinement in hypereutectic Al-Si casting alloys with phosphorus additions I. Evaluation of a new approach using Al-Fe-P additions to the melt 1555 Fosfor katkih hiperotektik Al-Si dokum alasimlannda silisyum tane inceltilmesi I. Eriyige Al-Fe-P katkisi seklindeki yeni yaklasimin degerlendirilmesi R. KAYIKgt, F.H. HAYES, E. AVCI Silicon particle refinement in hypereutectic Al-Si casting alloys with phosphorus additions II. Comparison of phosphorus refinement methods 1561 Fosfor katkih hiperotektik Al-Si dokum alasimlannda silisyum tane inceltilmesi II. Fosforla inceltme yontemleri ile karsilastinlmasi R. KAYIKgi, F.H. HAYES, E. AVCI The investigation of a new types of master alloy (Al-Cu, Al-Mn, Al-Ni, Al-Ti-Fe) rapidly quenched from the melt ( K/s) 1567 Hizli katilastirma ( K/s) ile uretilen yeni tur master alasimlarin Al-Cu, Al-Mn, Al-Ni, Al-Ti-Fe) incelenmesi G. V. GHICA, P. MOLDOVAN, N. PANAIT, G. POPESCU, M. GHICA Rafinasyon uygulamalanmn SIVI aluminyum kalitesine etkisi 1573 Effect of refinement methods on the melt quality of Aluminium Y. BlROL, O. gakir, H.K. ZEYTiN, N. KESKlN, E. OZDEN Dokum sqrecine ydnelik filtre sistemleri ve SiC-AI 2 O 3 sunger filtre uretimine iliskin olurluluk cahsmalan 1579 Filtering systems in casting processes and feasibility studies for the production of SiC-AI 2 O 3 foam filters N.S. CANARSLAN OHTEA ve HAA tekniklerinin basmcli dokqm drneginde uygulamah olarak karsilastinlmasi 1585 Comparison of FMEA and FT A techniques applied on the die casting B. PULATKAN, U. DEMlRLER, Y. TAPTIK, L. K0SEOGLU, 6. KELES XX