Influence of High Strain Rates on the Mechanical Behavior of High Manganese Steels
عنوان مقاله: Influence of High Strain Rates on the Mechanical Behavior of High Manganese Steels
شناسه ملی مقاله: JR_IJMF-1-1_001
منتشر شده در شماره 1 دوره 1 فصل April در سال 1393
شناسه ملی مقاله: JR_IJMF-1-1_001
منتشر شده در شماره 1 دوره 1 فصل April در سال 1393
مشخصات نویسندگان مقاله:
A Khosravifard - Department of Materials Engineering, Shiraz Branch, Islamic Azad University, Shiraz 71955, Iran
خلاصه مقاله:
A Khosravifard - Department of Materials Engineering, Shiraz Branch, Islamic Azad University, Shiraz 71955, Iran
In this study, dynamic mechanical properties of three high-manganese steels with TRIP/TWIP or fully TWIP characteristics are studied. High strain rate experiments in the range of true strain rates between ~500 and 1800 /s were conducted using a dynamic torsional testing setup. All the three steels show a positive strain rate sensitivity in the intermediate range of strain rates (up to 500 /s). But, they behave differently as the strain rate is further increased. The steel with the lowest carbon content shows a strain rate softening behavior, while the other two exhibit strain rate hardening. The adiabatic temperature rise of the material greatly influences its stacking fault energy during the high rate dynamic deformation. Thus, unlike the quasi-static experiments, the dominant deformation mechanism of the steel during a dynamic test changes as the deformation progresses. In this regard, the variations of the stacking fault energy during the deformation are calculated for the three steels.
کلمات کلیدی: High strain rate, TRIP/TWIP steel, stacking fault energy, adiabatic temperature rise
صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/541842/