کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7994711 | 1516159 | 2018 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effects of strain rate on the low cycle fatigue behavior of AZ31B magnesium alloy processed by SMAT
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A gradient nanocrystallined (NC) surface layer was generated on AZ31b magnesium alloy by means of surface mechanical attrition treatment (SMAT). The effects of strain rate and ball size on low cycle fatigue behavior of the SMATed samples were studied under strain-controlled mode. It is found that under the same strain rate, the fatigue life of the SMATed samples is significantly enhanced compared with the coarse-grained (CG) samples, and that the fatigue life of the SMATed samples treated with 3Â mm balls is longer than that of those treated with 2Â mm balls. The enhanced fatigue life of the SMATed samples is mainly attributed to the combined influences of compressive residual stress and NC surface layer suppressing the initiation of cracks. Meanwhile, for both the SMATed and the CG samples, the fatigue life increases with increasing strain rate, owing to the fact that high strain rate favors twinning activity and restricts dislocation slip, thus enhancing the fatigue crack resistance and prolonging the fatigue life.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 735, 25 February 2018, Pages 536-546
Journal: Journal of Alloys and Compounds - Volume 735, 25 February 2018, Pages 536-546
نویسندگان
Gang Chen, Jianwen Gao, Yun Cui, Hong Gao, Xiang Guo, Suzhou Wu,