Low-cycle Fatigue Behaviors of an As-extruded Mg-12%Gd-3%Y-0.5%Zr Alloy
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2013年第8期
论文作者：S.M.Yin S.X.Li
文章页码：775 - 780
摘 要：<正>Cyclic deformation and fatigue behaviors of Mg-12%Gd-3%Y-0.5%Zr（wt%,GW123K） alloy were investigated at room temperature under axial cyclic loading in strain controlled condition.It is shown that conventional extruded GW123K alloy maintained cyclic stability at strain amplitudes ranging from 2×10-3 to 10-2.The pronounced symmetric hysteresis loops were also observed during cyclic loading.Fracture surface observations indicated that fatigue cracks mainly initiated at large Gd-riched phase or at inclusion clusters at surface or subsurface,and grain boundary（GB） and slip bands（SBs） are also preferential sites for micro-crack incubation.
S.M.Yin1，S.X.Li2
1. Shenyang University of Chemical Technology2. Shenyang National Laboratory for Materials Science,Institute of Metal Research,Chinese Academy of Sciences
摘 要：<正>Cyclic deformation and fatigue behaviors of Mg-12%Gd-3%Y-0.5%Zr（wt%,GW123K） alloy were investigated at room temperature under axial cyclic loading in strain controlled condition.It is shown that conventional extruded GW123K alloy maintained cyclic stability at strain amplitudes ranging from 2×10-3 to 10-2.The pronounced symmetric hysteresis loops were also observed during cyclic loading.Fracture surface observations indicated that fatigue cracks mainly initiated at large Gd-riched phase or at inclusion clusters at surface or subsurface,and grain boundary（GB） and slip bands（SBs） are also preferential sites for micro-crack incubation.
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