کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7951839 1513698 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Effect of heat treatment on strain-controlled fatigue behavior of cast Mg-Nd-Zn-Zr alloy
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد شیمی مواد
پیش نمایش صفحه اول مقاله
Effect of heat treatment on strain-controlled fatigue behavior of cast Mg-Nd-Zn-Zr alloy
چکیده انگلیسی
The influence of heat treatment on the strain-controlled fatigue behavior of cast NZ30 K alloy was investigated. Compared with the as-cast and solutionized (T4) alloys, the peak-aged (T6) and over-aged (T7) counterparts have a higher cyclic stress and a lower plastic strain value due to the precipitation strengthening. The as-cast and T4-treated alloys have a higher fatigue strength/yield strength ratio than the aged alloys, which is mainly attributed to their higher cyclic hardening. Under stress-controlled loading, the aged alloys show lower hysteresis energies than the as-cast and T4-treated counterparts, leading to longer fatigue lifetimes. For the T4-treated alloy, the cyclic hardening and fatigue failure are controlled by the dislocations-slip and twinning, while for both the as-cast and T6-treated counterparts, they are controlled by the dislocation-slip. For the T7-treated alloy, cyclic deformation and failure behavior are mainly dependent on dislocations-slip and grain boundary sliding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Materials Science & Technology - Volume 34, Issue 11, November 2018, Pages 2091-2099
نویسندگان
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