پديد آورنده :
ديني تركماني، قاسم
عنوان :
بررسي ريز ساختار و خواص مكانيكي فولاد Fe - 31Mn - 3SiTWIP در هنگام تغيير شكل سرد
محل تحصيل :
اصفهان: دانشگاه صنعتي اصفهان،دانشكده مهندسي مواد
صفحه شمار :
پانزده، 123 ص.: مصور، جدول، نمودار
يادداشت :
ص. ع. به فارسي و انگليسي
استاد راهنما :
عباس نجفي زاده، محمود منير واقفي
استاد مشاور :
Rintaro Ueji
توصيفگر ها :
فولادهاي پرمنگنز/ دو قلويي شدن مكانيكي/ عمليات حرارتي/ نورد سرد
تاريخ نمايه سازي :
22/2/1389
استاد داور :
عباس اكبر زاده، عباس زارعي هنزكي، فخرالدين اشرفي زاده
كد ايرانداك :
ID303 دكتري
چكيده فارسي :
به فارسي و انگليسي: قابل رؤيت در نسخه ديجيتال
چكيده انگليسي :
Microstructural Evolutions and Mechanical Properties of Fe 31Mn 3Al 3Si TWIP Steel during Cold Deformation Ghasem Dini Torkamani gh dini@ma iut ac ir February 23 2010 Department of Materials Engineering Isfahan University of Technology Isfahan 84156 83111 Iran Degree PhD Language Farsi Supervisors Abbas Najafizadeh a najafi@cc iut ac ir Sayed Mahmoud Monir Vaghefi vagh mah@cc iut ac ir Advisor Rintaro Ueji ueji@eng kagawa u ac jp Abstract The tensile deformation behavior and microstructural evolutions of twinning induced plasticity TWIP steel with the chemical composition of Fe 31Mn 3Al 3Si and average grain sizes in the range of 2 1 to 72 6 m have been analyzed For each grain size the Hollomon analysis and also the Crussard Jaoul C J analysis as an alternative method to describe the work hardening behavior were investigated The results indicated that the optimum mechanical properties as a function of work hardening capacity can be obtained by changing the grain size The microstructural observations showed that the pile ups of planar dislocations are necessary for triggering the mechanical twinning and grain refinement suppresses the mechanical twinning in TWIP steel Furthermore the mechanical twinning increases with increasing applied strain As a result a high instantaneous work hardening due to the mechanical twin boundaries enhances the uniform elongation The contribution from the strain of twinning and hardening due to an increase in the hardness of the twinned regions i e the Basinski mechanism may be also useful in achieving the high strength ductility in TWIP steels Keywords TWIP steel mechanical properties grain size work hardening strengthening mechanism 1
استاد راهنما :
عباس نجفي زاده، محمود منير واقفي
استاد مشاور :
Rintaro Ueji
استاد داور :
عباس اكبر زاده، عباس زارعي هنزكي، فخرالدين اشرفي زاده
