THE EFFECT OF SEVERE PLASTIC DEFORMATION ON THE MICROSTRUCTURE AND MECHANICAL PROPERTIES OF AS-CAST AZ۳۱
- سال انتشار: 1395
- محل انتشار: مجله علم مواد و مهندسی ایران، دوره: 13، شماره: 3
- کد COI اختصاصی: JR_IJMSEI-13-3_004
- زبان مقاله: انگلیسی
- تعداد مشاهده: 166
نویسندگان
School of Materials and Metallurgical Engineering, Iran University of Science and Technology
School of Materials and Metallurgical Engineering, Iran University of Science and Technology
School of Materials and Metallurgical Engineering, Iran University of Science and Technology
Center of Excellence for Advanced Materials and Processing (CEAMP), School of Materials and Metallurgical Engineering, Iran University of Science and Technology
Institute of Metallurgy, Clausthal University of Technology
چکیده
The evolution of microstructure and mechanical properties of a magnesium cast alloy (AZ۳۱) processed by equal channel angular pressing (ECAP) at two different temperatures were investigated. The as-cast alloy with an average grain size of ۳۶۰ was significantly refined to about ۵ after four ECAP passes at ۵۴۳ K. Grain refinement was achieved through dynamic recrystallization (DRX) during the ECAP process in which the formation of necklace-type structure and bulging of original grain boundaries would be the main mechanisms. ECAP processing at lower temperature resulted in finer recrystallized grains and also a more homogenous microstructure. The mechanical behavior was investigated at room temperature by tensile tests. The obtained results showed that the ECAP processing can basically improve both strength and ductility of the cast alloy. However, the lower working temperature led to higher yield and ultimate strength of the alloy.کلیدواژه ها
Equal channel angular pressing, AZ۳۱, Magnesium alloy, Dynamic Recrystallizationاطلاعات بیشتر در مورد COI
COI مخفف عبارت CIVILICA Object Identifier به معنی شناسه سیویلیکا برای اسناد است. COI کدی است که مطابق محل انتشار، به مقالات کنفرانسها و ژورنالهای داخل کشور به هنگام نمایه سازی بر روی پایگاه استنادی سیویلیکا اختصاص می یابد.
کد COI به مفهوم کد ملی اسناد نمایه شده در سیویلیکا است و کدی یکتا و ثابت است و به همین دلیل همواره قابلیت استناد و پیگیری دارد.