TY - JOUR
T1 - Hot deformation behaviors of WE71 alloy under plain strain compression at elevated temperature
AU - Yin, Bangqi
AU - Xue, Xiangyi
AU - Tang, Bin
AU - Wang, Yi
AU - Kou, Hongchao
AU - Li, Jinshan
N1 - Publisher Copyright:
© 2020
PY - 2020/8
Y1 - 2020/8
N2 - Hot deformation behaviors of WE71 (Mg–7Y-1Nd-0.5Zr) alloy was investigated by plain strain compression tests conducted at temperatures ranging from 350 °C to 500 °C and strain rates varying from 0.01 s-1 to 10 s-1. Results show that the hot deformation of WE71 was accompanied by the precipitation of rich Zr phase with granular shape and block-shaped phase rich in element Y. When deformed at low temperature and high strain rate, the softening behavior of the alloy was synergically determined by shear bands propagation, adiabatic heating, twinning formation and dynamic recrystallization (DRX). For the conditions of high temperature and high strain rate, DRX was the major softening mechanism while the formation and annihilation of extension twinning resulted in a special flow curve characteristic at the strain of around 0.3. According to the microstructural observations, it can be concluded that the irregular flow curves of WE71 alloy during plain strain compression process are mainly ascribed to shear bands propagation, adiabatic heating, twinning formation and DRX.
AB - Hot deformation behaviors of WE71 (Mg–7Y-1Nd-0.5Zr) alloy was investigated by plain strain compression tests conducted at temperatures ranging from 350 °C to 500 °C and strain rates varying from 0.01 s-1 to 10 s-1. Results show that the hot deformation of WE71 was accompanied by the precipitation of rich Zr phase with granular shape and block-shaped phase rich in element Y. When deformed at low temperature and high strain rate, the softening behavior of the alloy was synergically determined by shear bands propagation, adiabatic heating, twinning formation and dynamic recrystallization (DRX). For the conditions of high temperature and high strain rate, DRX was the major softening mechanism while the formation and annihilation of extension twinning resulted in a special flow curve characteristic at the strain of around 0.3. According to the microstructural observations, it can be concluded that the irregular flow curves of WE71 alloy during plain strain compression process are mainly ascribed to shear bands propagation, adiabatic heating, twinning formation and DRX.
KW - Dynamic recrystallization
KW - Hot deformation behavior
KW - Plain strain compression
KW - Shear band
KW - WE71 alloy
UR - http://www.scopus.com/inward/record.url?scp=85091605159&partnerID=8YFLogxK
U2 - 10.1016/j.pnsc.2020.08.007
DO - 10.1016/j.pnsc.2020.08.007
M3 - 文章
AN - SCOPUS:85091605159
SN - 1002-0071
VL - 30
SP - 526
EP - 532
JO - Progress in Natural Science: Materials International
JF - Progress in Natural Science: Materials International
IS - 4
ER -