عنوان	Strain Hardening During Hot Compression Through Planar Dislocation and Twin-Like Structure in a Low-Density High-Mn Steel
نوع پژوهش	مقاله چاپ شده
کلیدواژه‌ها	mechanical behavior, steel, thermo-mechanical processing, twinning
چکیده	In this work, we study the flow hardening behavior and microstructural evolution in a low-density Fe-21Mn-0.1C-2.0Al-2.5Si (wt.%) transformation-twinning-induced plasticity steel during hot compression. The substructures were examined by transmission electron microscopy and electron backscatter diffraction methods. The alloy exhibits a combination of strain hardening (at low and medium true compression strains, <0.2) followed by a strain softening at 800 C. We explain the flow hardening behavior in terms of substructure refinement due to planar dislocation, as well as twin-like structure. The transmission electron microscopy results suggest that short-range ordering triggers slip planarity after straining to 0.05 at 800 C. Twin-like structure with misorientation angle higher than 20 is formed during further plastic deformation.
پژوهشگران	محمدعلی مهتدی بناب (نفر چهارم)، Jerzy A. Szpunar (نفر پنجم)، مصطفی اسکندری (نفر اول)، عباس زارعی هنزکی (نفر دوم)، علیرضا کمالی (نفر سوم)