* * • - •

ISSN 1301-3637

9PROCEEDINGS of the

INTERNATIONAL METALLURGYand MATERIALS CONGRESSULUSLARARASI METALURji ve

MALZEME KONGRESlBiLDIRlLER KtTABI

VOLUME I / ClLTI

UB/TIB Hannover

11-15 JUNE 1997 / 11-15 HAZlRAN 1997

iSTANBUL EXHIBITION PALACE / ISTANBUL SERGlSARAY1

ISTANBUL, TiiRKiYE

SUPPORTED hy/DESTEKLEYENKURULUSLARTUBtTAK, SARKUYSAN, tgDA§, FAF METAL, FMC-NUROL,EKINClLER DI§ TlC.A.§., gOLAKOfiLU METALURji S.T.A.§.

Union of Chambers of Turkish Engineers and ArchitectsCHAMBER OF METALLURGICAL ENGINEERS

Turk Miihendis ve Mimar Odalan BirligiMETALURjiMUHENDtSLERl ODASI

Publication No. / Yaytn No. 33

Content of - VOLUME I / ClLTI - igindekiler

IRON - STEEL / DEMIR QELIK

Departure from reaction equilibria in oxygen steel making processes 1E.T. TURKDOGAN

Denizli-Tavas mangan cevherinden ergitme yontemi ile yiiksek karbonluferromangan elde edilmesi 23Production of high carbon ferromanganese from Denizli-Tavas manganese oreby smelting methodT. iMER, F. KALFAOGLU, N. SEViNQ, A. GEVECi

Strategy for the energy efficiency improvement in the iron and steelindustry corporation "Sartid 1913" 29Sartid 1913 demir-celik isletmesinde enerji verimliligini arttirmaya yonelikstratejilerR. MILOJKOVIC, P. KUKOLECA, J. FILIPOVIC, M. GAVRILOVSKI

Reduction kinetics and mechanism of CoO-doped Fe2O3 compacts 35CoO katkili Fe2O3 kompaktlannin indirgeme kinetigi ve mekanizmasiA.A. EL - GEASSY, M.I. NASR, M.H. KHEDR

Paslanmaz celik uretiminde yeni egilimler 43New trends in the production of stainless steelG.GUNEY, E. OKTAY, I. YUSUFOGLU

The sulphide capacity dependence on temperature and chemicalcomposition of slags and metal at steelmaking in EAF 49EAF gelik uretiminde sulfur kapasitesinin curuf ve metal kimyasal bilesimi vesicakhgi ile iliskisiD. ZIZIC, M. TRIPKOVIC, M. MURATOVIC, S. DORDAN

Turkiye demir celik sektbrii ve dunyadaki yeri 55Turkish iron-steel sector and its place in the worldR.GEZiCi

Studies on the reduction of iron ore with fuel oil 61Demir cevherinin fuel oil ile indirgenmesi uzerine cahsmalarM.K.KHEDR, M.I.NASR, A.A.EL-GEASSY, M.S.ALY

Kok ve linyit komurii tozu iceren demir cevherlerinin reduksiyonu 71Reduction of iron ores containing coke and lignite powderA. ARABACI, S. AYDIN

VII

Demir celik endiistrisinde metalurjik komur karisimlarmin bilgisayardestekli se9imi 79

Computer - aided selection of metallurgical coal blends in iron-steel industry

F.§. ONER

Investigation the influence of operating parameters on the quality incontinuously steel casting blocks 85

Celik bloklarmin surekli dokumunde kaliteye etki eden isletme parametrelerininarastmlmasi

E.G. MICHAILOV, V.I. PETKOV, R.D. STANEV, N.S. AKHMAKOV

Experimental researches on the determination of beginning temperature ofcarbon oxidation reaction in metallurgical melts from Fe-Cr-Me-0 systems 91

Fe-Cr-Me-0 sistemlerindeki metalurjik eriyiklerde karbon oksidasyontepkimesinin baslangic sicakligmin belirlenmesine yonelik deneyselarastirmalar

V. GEANTA, N. CONSTANTIN, I. TONOIU, R. STEFANOIU

Entegre demir celik tesislerinde ortaya cikan kati atiklanndegerlendirilmesi 97Appraisal of solid wastes generated in the iron and steel worksL QAMCI, S. AYDIN

Improvement of the operating parameters of the secondary cooling zonein a machine for continuous steel casting 103Surekli celik dokum makinasinda ikincil sogutma zonunun isletmeparametrelerinin iyilestirilmesi

N.S. AKHMAKOV, E.G. MICHAILOV, V.I. PETKOV, R.D. STANEV

Investigation of the thermodynamics of the reduction of ferro oxides fromslurries in the presence of copper oxide 109

Camurlardaki demir oksitin bakir oksit varliginda indirgenmesinin termodinamikozelliklerinin incelenmesi

R. PAUNOVA, K. TODOROV, X. ALIPIEVA

Mathematical model on the correlation of the combustion zone parametersin case of using different auxiliary combustibles 115

Degisik yardimci yanicilarm kullanilmasiyla yanma zonu parametreleriiliskilerinin matematik modellenmesi

N. CONSTANTIN, V. GEANTA, R. STEFANOIU

VIII

Investigation of the thermodynamics of the reduction of ferro oxides fromslurries in the presence of lead and zinc oxides 121Camurlardaki demir oksitin kursun ve cinko oksitlerin varhginda indirgenmesinintermodinamik ozelliklerinin incelenmesiR. PAUNOVA, K. TODOROV, X. ALIPIEVA

Contributions to obtaining and using of alloys containing reactiveelements 127Reaktif elementler iceren alasimlarin kullanilmasi ve eldesine etki eden katkilarA. CIOCAN, V.S. LANDES

Researches concerning the improvement of the thermal and functionalconditions of the metallurgical furnace with combustion 133Yanmali metalurjik finnlarda isil ve islevsel kosullann iyilestirilmesine yonelikarastirmalar

A. NICOLAE, C. PREDESCU, V. DINA, C. MIHALIESCU, A. SEMENESCU, G. SEUM

CORROSION / KOROZYON

Korozyondan korunmada gelismeler: Betonarme yapilarda ve ince sertseramik kaph malzemelerde korozyon kontrolu 139Developments in corrosion protection : Corrosion control in reinforced concretestructures and hard ceramic coated materialsA. F.QAKIR

Anodizasyon oncesi yiizey hazirlama islemlerinin 6063 Al alasimimnyuzey ozelliklerine etkisi 159

Effect of pretreatments prior to anodizing on the surface properties of 6063Al-alloy

F. SERTCELiK, A.F. CAKIR, M. ORGEN, D.D.ROSS, D.R. GABE

4140 ve 4340 celiklerinin kostik bir ortamdaki gerilimli korozyon davranisiiizerine icyapisal etkilerinin incelenmesi 165Investigation of the microstructural effects on the strees corrosion crackingbehaviour of 4140 and 4340 steels in caustic solutionM.K. PEHLiVANOGLU, F. SARIOGLU

Ostenitik paslanmaz celiklerde gerilim korozyonu kinlmasimn yuzeykaplama islemleri ile onlenmesi : 171

Prevention of strees corrosion cracking in the austenitic stainless steels bysurface coating processesI.A. SAPgi, B. OGEL

IX

Stabilizasyon ve yaslandirma islemlerinin cinko-aluminyum esashalasimlarin korozyon ozelliklenne etkilerinin incelenmesi 177Investigation of the effects of stabilization and aging processes on the corrosionproperties of Zn-AI based alloysH.H. AYAR, T. SAVASKAN

Rubber coatings for anticorrosion protection in various chemicals 183Cesitli kimyasallara karsi kullanilan korozyondan koruyucu lastik kaplamalarM.V. POPA, E. VASILESCU, P. DROB, M. ANGHEL

Durability of the anticorrosion epoxy putties coatings in acid, neutral andalkaline media 189Asit, notral ve alkali ortamlarda antikorozif epoksi kaplamalarm kararliligiM.V. POPA, E. VASILESCU, P. DROB, M. ANGHEL

Farkli celikler uzerine plazma puskurtulmus AI2O3 ve AI2O3+TiO2

kaplamalarda korozyon direncinin incelenmesi 195Investigation of corrosion behaviour of plasma sprayed AI2O3 and AI2O3+TiO2

coatings on different steelsE. CELiK, E. AVCI

Kapali dongu gaz turbtinu ortaminda ferritik MA 956 ve ODM 751malzemelerde breakaway oksitlenme olusumunun mekanizmasi 201Formation mechanism of breakaway oxidation in the ferritic MA956 and ODS751 materials in a close cycle gas turbineM. TURKER, A. KURT, M. M. YILDIRIM

Influence of Mo and Al content on the passivity behaviour of titanium basealloys in neutral solutions 209Titanyum esasli alasimlarin notral cozeltilerdeki pasiflesme davranisma Mo veAl etkisiM.V. POPA, O. RADOVICI, E. VASILESCU, I.MIRZA-ROSCA, R. SOUTO, S.GONZALES, P. DROB

The passivation of steels by oxidic materials based on ferrites of earthmetals (FEM) 215Toprak alkali ferrit esasli oksitler ile celiklerin pasiflestirilmesiK.K. LEPESSOV, L.N. GURYEVA

Kinetics of ARMCO iron corrosion in hydrochloric acid inhibited withsome organic surfactants 219Bazi organik yuzey aktiflestiricilerle frenlenmis hidroklorik asit icerisindeARMCO demirin korozyon kinetigiV. BRANZOI, F. BRANZOI, M. BAIBAAC, M. POPA, E. VASILESCU

Electrochemical and chemical treatment of metal surface as a backgroundfor preparation of effective catalysts for redox processes 225

Redoks surecleri icin etkin bir katalist hazirlama amaciyla metal yuzeylerinin

elektrokimyasal ve kimyasal olarak islenmesi

Y.M. ARINKIN, N.A. ZAKARINA, G.V. AKULOVA

WEAR / A$INMA

Surtunme ve asmma 229Friction and wearF.YILMAZ

Kendinden yaglamali bronz ve bakir yataklann asinma davranislanninbelirlenmesi 257Determination of wear resistance of bronze and copper self-lubricated bearingsA. KURT, M. TURKER, B. GULENQ

Endiistriyel zimbalama isleminde sert seramik kaplamalann asmmadavramslan 263Wear behaviour of hard ceramic coatings during industrial punching process

A. OSMA, M. URGEN, E.S. KAYALI

Coklu PVD katmanlanyla darbeli kesmede kullamlan seramik katmanhtakimlarda dmiir artirimi 269Increasing the tool life of ceramic layered tools used under intermittent cuttingconditions by multilayer PVD coatingH. KARAGOZ, S. KARAGOZ

Polimerlerin asmma davranislannin deneysel olarak incelenmesi 275An experimental study on determining wear behaviour of polymersV. UQAR, Y. SOYDAN, A. POLAT, M. PAK

Cinko-Aluminyum esasli kayrriah yataklann degisik calismakosullanndaki surtunme davranismin incelenmesi 283Investigation of friction behaviour of Zn-AI based bearings under differentservice conditionsH. QUVALCI, T. SAVASKAN

Plazma spreylenmis Cr3C2-NiCr kaplamalann abraziv asmmadavranislannin incelenmesi 291Investigation of the abrasive wear behaviour of Cr3C2-NiCr coatings obtained byplasma sprayingU. PAMUK, H. giMENOGLU

XI

Mn ve Si alasim elementlerinin 9inko-aluminyum alasimlannin asinmadayanimma etkisi 297Effect of Mn and Si alloying element on the wear resistance of Zn-AI alloysA. TURK, H. AKBULUT

Cinko-aluminyum esasli ZA-8 alasimimn sertlik ve asinma dayanimmaaluminyum ve bakir iceriginin etkisi 305Effect of Al and Cu contents on the hardness and wear resistance of Zn - Albased ZA-8 alloy5. ARSLAN, A. TURK, M. DURMAN

Karbon-peek polimer kompozitlerde kristallesmenin mekanik ve tribolojikozelliklere etkileri 313Effect of crystallization on the mechnical and tribological behaviour of carbon -peek polymer compositesT. SINMAZCEUK, A. ARICI

1050 Celiginde mikroyapi ve mekanik ozelliklerin talas morfolojisi ileisleme ozelliklerine etkisi 319Effect of microstructure and mechanical properties on chip morphology andcutting properties of 1050 steelsY. OZQATALBAS, F. ERCAN, M. TURKER

Laser cladding of a martensitic stainless steel on a tool steel substrate 327W. AZZOLINI, M.C. IERARDI, A. GARCIA, R. VILAR

SURFACE PROCESSING /YUZEY l'$LEMLERi

Modem yuzey islemleri ve Tiirkiye'deki gelismeler 333Modern surface processing and developments in TurkeyM. URGEN

TiN sert seramik kaplamamn kesici takim omrune etkisiEffect of TiN ceramic thin film on the cutting tools' life 351D.ALPDORUK, , E.S. KAYALI, A.F. CAKIR, A. OSMA, G. AVUNCAN

Krom karbiir tabakasi olusumunda arayuzey olaylan 357Interfacial phenomena during the formation of chromium carbide layers6. OZDEMiR, F. USTEL, S. ZEYTiN

Diamond nucleation and films on cemented tungsten carbide (WC) tools 363Sementit volfram karbur takimlar uzerinde elmas 9ekirdeklenmesi ve film olusumlanM. ECE, B. ORAL

Xff

Metal-ceramic composite layers produced by laser techniques 371Lazer teknikleri kullanilarak uretilen metal-seramik kompozit katmanlarM. TACA, M.C. BUNESCU, M.O. COJOCARU

Plasma-assisted processing of materials 377Plazma destekli yontemlerle malzemelerin islenmesiO.T. iNAL

Sert seramik kapli kesici takim kullanimimn ekonomik analizi 383Economic analysis of the use of hard ceramic coated cutting toolsY. TAPTIK, K. KAZMANLI, M. URGEN, A.F. CAKIR

Tipki-elmas karbon filmier ve uygulamalan 389Diamond-like carbon films and their applicationsB. ORAL, M.ECE

Effect of manganese on the properties of bonded low alloy steels 397Borlanmis dusuk alasimli ?eliklerin ozellikleri uzerine manganezin etkisiC. BiNDAL, A.H. UCISIK

Plazma piiskiirtme yontemi ile yapilan plastik esasli kaplamanin bagmukavemetinin incelenmesi 405Investigation of the bond strength of the plastic powdercoatings formed by plasma sprayingM. OKSUZ, R. SAMUR, H. YILDIRIM

TiCN ve TiN kaplamalar uzerine karsilastirmali arastirmalar 413Comparison of TiCN and TiN coatingsH.U. CAKIR, H. ALANYALl.S. KARAGOZ

AISI 8620 sementasyon ?eliginin bor kaplanmasi 419Boron coating of AISI 8620 cementation steelS. SEN, C. BiNDAL

Kutu semantasyonu metodu ile 9eliklerin titanyum kaplanmasi 425Titanium coating of steels by pack cementation methodM. iPEK, F. USTEL, S. ZEYTiN

Seramik kaplamalarda termal sok uzerine malzeme ozelliklerinin etkisininsonlu elemanlar yontemi ile analizi 431Finite element analysis of the effect of material properties in ceramic coatingson the thermal shockA. QELEBi, A. MiMAROGLU, 6.F. YENJHAYAT

XIII

Seramik kaplamalarda termal sok etkisinin sonlu elemanlar yontemiyleanalizi 437

Finite element analysis of thermal shock in ceramic coatings

A. CELEBi, A. OZEL, A. MiMAROGLU

AISI D2 takim 9eliginin bor kaplanmasi ve kaplama ozellikleri 443

Boron coating of AISI D2 tool steel and coating properties

U. SEN, F. YILMAZ

POWDER METALLURGY ITOZ METALURJlSi

Toz metalurjisi: tarihsel gelisim, uretim asamalan ve son egilimler 449

Powder metallurgy : historical development, production stages and recent trends

M. L OVECOGLU

Toz metalurjisinde Turkiye'nin yeri 477

The place of Turkey in powder metallurgy

O. TANBERK

Ni-Fe-W sisteminde ger9eklestirilen mekanik ogutme 9alismalan ve eldeedilen tozlann kati hal sinterleme siirecleri 487

Mechanical milling studies in the Ni-Fe-W system and solid state sinteringprocesses of the milled powders

B. OZKAL, M. L. OVEQOGLU

Al-Si ve Al-Cu-Si sistemlerinin SIVI faz sinterlenme ozellikleri 493

Liquid phase sintering behaviour of Al-Si and Al-Cu-Si systems

K. BOLAY, B. OGEL

Influence of pH on electrohemical synthesis of cupric oxide powder 499

Kuprik oksit tozlannin elektrokimyasal sentezine pH'nin etkisi

Z.D. STANKOVIC, M.R. VUJASINOVIC, M. VUKOVIC, S. KRCOBIC

Construction of combined porous nozzle for plasma torch and powdermetallurgical technology for its production 505Plazma torcu icin bilesik gozenekli nozul tasarimi ve uretimi icin gereken tozmetalurjisi teknolojisi

M. MIHOVSKY, T. TZONEV, B. LUCHEVA

XIV

Tests to obtain a sintered nickel-base material using elemental powders 511Elementel tozlar kullanarak sinterlenmis bir nikel-esasli malzeme elde etmekigin deneylerM. LUCACI, CD. VIDU, E. VASILE, CM. BUNESCU

Surekli disk tipi elmasli kesici takimlarda hata karakterizasyonu 517Defect characterization in the continuous disc type diamond cutting tools

S. KARAGOZ.'M. ZEREN

Cu-25Cr kontak malzemesinin sinterleme ozelliklerinin belirlenmesi 527

Determination of the sintering behaviour of Cu - 25 Cr contact materials

H.i. BAKAN, S.OZBEK, T. BAYKARA, E.S. KAYALI

CERAMIC - REFRACTORIES - GLASSSERAMIK - REFRAKTER - CAM

Turk seramik sektoru 533

Turkish ceramic sector

B. SEZER

Turk refrakter sektoru „ 543

Turkish refractory sector

B. SEZER

Sonlu elemanlar yontemi yardimiyla SIVI ?elik dokum pota refrakterastarimn termo-mekanik ozelliklerinin incelenmesi 549

Investigation of the variation of thermomechanical properties of a steel ladlerefractory lining by FEM

S. YILMAZ, S.OZGEN, H.F. SCHWEIGER

MnO katkih ZnO - ag %6 Sb2O3 sisteminin elektriksel ozellikleri 557Electrical properties of MnO-added ZnO - 6 -wt % Sb2O3 system

H.6. TOPLAN, O.T. OZKAN

Influence of the technological parameters on the formation of crusts onthe internal layer of the refractory lining in the Waelz kilns 563

Waelz tipi finnlarda refrakter astarimn i? tabakalannda kabuk olusumuna etkieden teknolojik parametreler

B.S. STEFANOV, R.E. KATERINOV, V.P. STEFANOVA

Fabrication, characterization and magnetic properties of GdPr-123 system ., 569GdPr-123 sisteminin uretimi, karakterizasyonu ve manyetik ozellikleriZ. YAMANI, M. AKHAVAN, Magnet Res. Lab. - Sharif University IRAN

Nanostructured ceramics through self-assembly 575

Kendiliginden duzenlenen nano yapili seramikler

i. AKSAY

ileri malzeme bilim ve teknolojileri: ulusal strateji ve politika olusturma9ahsmalart 583Advanced materials science and technologies: studies for establishing nationalstrategy and policyT. BAYKARA, S.OZBEK, B. KUBAN

Electrical properties of BZS pyrochlore - ZnO mixtures 597BZS piroklor-ZnO karsimlarinm elektriksel ozellikleriA. MERGEN, R. PUYANE, Y. KARAKAS

Pirin9 kabuklanndan karbotermal sentezle iiretilen silisyum karbiir (SiC)viskerlerinin morfolojisi 605Production of SiC - vhiskers from the rice husks by carbo-thermal synthesisY. A. R. YUCEL, A. GEVECi

Ba-Sr mixed ferrite preparation using a conventional technique 611Geleneksel bir teknik kullamlarak Ba-Sr karisik ferrit hazirlanmasiJ. AMIGHIAN, M. MOZAFFARI, H. SALAMATI

Li4SiO4Zn2SiO4-AI2O4-SiO2 sisteminde kati hafde faz dengeleri 617Solid state phase equilibria in the system of Li4SiO4Zn2SiO4-AI2O4-SiO2

E. DEMlRKESEN

Fe78B13Si9 metalik caminda yuzey kristallesmesi 621Surface crystallization in the Fe78B13Si9 metallic glassY. BiROL

Bazalt caminin refrakter tuglalarla etkilesimi 627Interaction of basalt glass with refractory bricksS. YILMAZ, V. GUNAY

Eskisehir Sivrihisar sepiyolitlerinin reolojik ozellikleri 633Rheological properties of the Eskisehir - Sivrihisar sepiolitesE. GUNAY, T. BAYKARA, O. OZKAN

XVI

COMPOSITE MATERIALS / KOMPOZlT MALZEMELER

Kompozit malzemelerde son gelismeler ve ileriye doniik beklentiler 639

Recent developments in composite materials and future expectations

B. OGEL

AI-TiCp kompozitlerin Al-Ti eriyikleri i9inde grafit cozundiirulerekuretilmesi 651

Production of AI-TiCp composites by solving graphite in the Al-Ti melt

Y. BiROL, N. PARKAN, O. QAKIR

Manufacture of alumina fibre/mullite multilayer nanoceramic matrixcomposites using electrophoretic filtration deposition (EFD) andoptimization of the process parameters 657

Elektroforetik filtrasyon biriktirme yontemi kullanilarak alumina fiber/mullit 50kkatmanh nanoseramik kompozit uretimi ve proses parametrelerininoptimizasyonu

C. KAYA, P.A. TRUSTY, C.B. PONTON

Tensile and fatigue properties of Ti/SCS 6 fibre crossply laminates 663

Ti/SCS 6 fiberlerle pekistirilmis karsit katmanh laminalarm fekme ve yorulmaozellikleri

F. KAYA, P. BOWEN

AI-%10 Cu metalik kopiik uretimi 669Production of Al - 10 % Cu metallic foam

S. KARAKUS, T. OZTURK

Type III carbon fibre weave reinforced polymeric composite materials :Physico - mechanical and tribological characterisation 675

Tip III Karbon fiber orgusu ile pekistirilmis polimer esash kompozit malzemeler:Fiziko-mekanik ve tribolojik karakterizasyonu

C. NOVAC, E. ALEXANDRESCU, CM. BUNESCU, M. CORBAN

A new shear deformable finite element model for the analysis ofgeometrically nonlinear laminated plates 681

Geometrik anlamda dogrusal olmayan lamina plakalannin analizi igin yeni birkesme yoluyla deforme olan sonlu element modellE. GUNAY

XVII

MECHANICAL METALLURGY /MEKANiK METALURji

Metal/metal tabakali kompozitlerin haddelenmesi ve mikroyapi denetimi 687

Rolling of metal/metal layered composites and obtaining a controlledmacrostructureT. EDiZ, O. ERCAN, 6 . YAZAR, J. MIRMESDAGH, E. SOYDANER, T. OZTURK

Kisa ve uzun yorulma 9atlaklannin gelikteki farkh buyume davramslan 701

Different growth behaviour of short and long fatigue cracks in steel

C. KAYNAK, A. ANKARA, T.J. BAKER

Kizgin buhar borularimn teta-projeksiyon yontemiyle kalan omiirbelirlemesi 707Remaining life estimation of hot-steam pipes by teta-projection methodC.YANAR, E.TEKiN

Cinko - aluminyum esasli ZA-8 alasiminda magnezyum elementininmekanik ve mikroyapisal ozelliklere etkisi 713Effect of magnesium on the mechanical and microstructural properties of Zn - Albased ZA-8 alloyA. TURK, M. DURMAN, E.S.KAYALI

Al-SiCp kompozitinin isil 9evrim kosulu altinda davranismin teorik vedeneysel incelenmesi 721Theoretical and experimental investigation of the behaviour of Al-SiCp compositeunder thermal cycling conditionsM.YILMAZ.S.ALTINTAS

Ultrahigh carbon steels, damascus steels, and superplasticity 727Cok yuksek karbonlu ?elikler, Sam ?elikleri ve superplastisiteO.D. SHERBY.J. WADSWORTH

Torsion testing to assess the formability of an ultrahigh carbon steelcontaining Al and Cr 745Al ve Cr iceren 90k yuksek karbonlu celige sekillenebilme ozelligini belirlemekamaciyla burma deneyinin uygulanmasiM. CARSI, F. PENALBA, M.T. LARREA, O.A. RUANO, O.D. SHERBY

Processing of materials with explosives 751Patlayici kullanarak gergekle§tirilen malzeme uretim surefleriO.T.INAL, C.A. ZIMMERLY

XVIII

The influence of microalloying on steel fatigue resistance in air and incorrosion environment 765Celigin hava ve korozif ortamlardaki yorulma direncine mikroalasimlamanin etkisiL PALAGHIAN

Cam polyester kompozitinde elyaf hacim oram ve elyaf dogrultusunun9ekme dayanimma etkisi 769Effects of fiber volume fraction and fiber orientation on the tensile strength of theglass-polyester compositei.YASAR.F.ARSLAN

Nafta par9alama fmni sargi borularmda kalan dtnur belirlemesi 775Remaining life determination in the tubes of naphta cracking furnacesF.6. ORHANER, E. TEKiN

Karbon-karbon kompozitlerinin mekanik ozellikleri 781Mechanical properties of carbon / carbon compositesA. OZTURK

U9UCU kiil dolgulu polyester matrisli kompozit malzemelerin mekanikozelliklerinin incelenmesi 787Investigation of the mechanical properties of the composite materials with flyashreinforced polyester matrixA. TOPUZ, D. TOPLU, M. YILDIZ

Siiperplastisite galismalan \q\n bir deney diizenegi ve ZnAI20Cu2

alasimmin superplastik davranisimn incelenmesi 793A test design for superplasticity studies and investigation of the superplasticbehavior of ZnAI20Cu2 alloyF. ARSLAN, A. CANAKCI, G. DONMEZ

Statistical prognosis of the behaviour of aluminum specimens with threedefects in the whole range of applied stress 799Uygulanan turn gerilme arahginda Cig kusurlu aluminyum numunelerindavramslarimn istatistiksel teshisiD. ANGELOVA, A. DISHLIEV, I. VASSILEV, L. SLAVTCHEVA

SAE 8620 geliginden karbonlanmis enjeksiyon pompalannda olusan9atlaklarm incelenmesi 803Investigation of cracks on the injection - pump - camshafts made of carburizedSAE 8620 steelA. KESKiN

XIX

Research on the influences the different melting processes have on theplastically deformation properties of the Ni - base superalloys 809Ni-esash superalasimlarm plastik deformasyon ozelliklerine degisik ergitmesureglerinin etkisinin arastmlmasiD. CARCIUMAREASE

Yonlendirilmis katilastinlan Zn-Bi ve Zn-Pb monotektik alasimlanninmekanik ozellikleri 815Mechanical properties of directionally solidified Zn - Bi and Zn - Pb monotecticalloysM.A. SAVAS, E. SiMSEK, S. ALTINTAS

Soguk deformasyon ?elik halat tellerinin yorulma ve mekanik ozelliklerineetkisinin incelenmesi 823Investigation of the effect of cold deformation on the fatigue life and mechanicalproperties of steel rope wiresM. TAYANQ

XX