کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7973935 | 1514631 | 2018 | 30 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Ductility and formability of three high-Mn TWIP steels in quasi-static and high-speed tensile and Erichsen tests
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
دانش مواد (عمومی)
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Ductility and formability of three high-Mn TWIP steels in quasi-static and high-speed tensile and Erichsen tests Ductility and formability of three high-Mn TWIP steels in quasi-static and high-speed tensile and Erichsen tests](/preview/png/7973935.png)
چکیده انگلیسی
The ductility and formability properties of three high-Mn TWIP steels were investigated under quasi-static and high-speed deformation conditions. The ductility was evaluated from conventional and Hopkinson split-bar tensile tests at 1250â¯sâ1 and the stretch formability was evaluated using Erichsen tests made with a special high-speed electro-hydraulic forming machine at about 1000â¯sâ1. The data were related to microstructural features revealed using electron backscatter diffraction and X-ray diffraction. Furthermore, the stacking fault energy (SFE) was estimated using a thermodynamic approach. It was found that the 0.6C-22Mn and 0.2C-21Mn-0.23N steels (compositions in wt%) with SFEs of 23-24â¯mJ/m2 exhibited good elongation and a large Erichsen index at both low and high strain rates. These were attributed to intensive mechanical twinning though partly replaced by dislocation slip in deformation bands in the high-speed tests. However, it was noticed that the high-speed stretching failure of these TWIP steels occurred in the uniform elongation range without diffuse necking. In the austenitic - ferritic 21Mn-3Al-3Si steel strain-induced martensite was formed, but the ferrite phase seemed to impair formability.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: A - Volume 712, 17 January 2018, Pages 255-265
Journal: Materials Science and Engineering: A - Volume 712, 17 January 2018, Pages 255-265
نویسندگان
A.S. Hamada, A. Kisko, A. Khosravifard, M.A. Hassan, L.P. Karjalainen, D. Porter,