Microstructure evolution and mechanical properties of Mg–Nd–Y alloy in different friction stir processing conditions
作者： Genghua Cao , Datong Zhang , Wen Zhang , Cheng Qiu
DOI: 10.1016/J.JALLCOM.2015.02.081
关键词:
摘要: Abstract Microstructure evolution and its effect on mechanical properties of Mg–Nd–Y alloy during normal friction stir processing (NFSP) submerged (SFSP) were investigated. It was found that microstructure the as-cast mainly composed coarse α-Mg dendrites net-shaped Mg12Nd phases. After NFSP SFSP, greatly refined with average grain size 2.7 μm 1.9 μm, respectively. The finer obtained by SFSP attributed to rapid cooling rate. Moreover, networks changed into small particles. specimen more homogeneous than NSFP specimen, in which band could be found. Tensile tests indicated exhibited lowest ultimate tensile strength (UTS) 178 ± 3.5 MPa, yield (YS) 172 ± 3 MPa elongation 3.4 ± 0.5% because grains large eutectic Due refinement, UTS, YS specimens increased 291 ± 4.6 MPa, 270 ± 5 MPa, 7.5 ± 0.5% 297 ± 6.9 MPa, 281 ± 3.9 MPa, 20.3 ± 1.8%,
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