TY - JOUR
T1 - The roles of long period stacking ordered structure and Zn solute in the hot deformation behavior of Mg-Gd-Zn alloys
AU - Li, Yun
AU - Xiao, Wenlong
AU - Wang, Fang
AU - Hu, Tong
AU - Ma, Chaoli
N1 - Publisher Copyright:
© 2018 Elsevier B.V.
PY - 2018/5/15
Y1 - 2018/5/15
N2 - In order to investigate the roles of long period stacking ordered (LPSO) structure and Zn solute in the hot deformation behavior of Mg-Gd-Zn alloys, the Mg-12Gd-1Zn-1Mn-0.5Zr alloy containing LPSO phase or Zn solute was hot compressed under various deformation conditions in comparison with the Zn-free Mg-12Gd-1Mn-0.5Zr alloy. The results showed that the Zn-containing alloys had stronger softening effects, larger peak stress and higher average activation energy than the Zn-free one within the safe deformation domain. Both LPSO phase and Zn solute in α-Mg matrix increased the efficiency of power dissipation, narrowed down the flow stability regions of processing map and impeded the dynamic recrystallization (DRX), especially when Zn solute was mainly in α-Mg matrix. Furthermore, the LPSO phase or Zn solute in α-Mg matrix promoted the dynamic precipitation. A few Mg5Gd particles can be observed in the Zn-free alloy, while a large number of stacking faults (SFs) and LPSO phase were precipitated in the Zn-containing alloys, and they were eventually transformed into Mg5Gd particles at low strain rate.
AB - In order to investigate the roles of long period stacking ordered (LPSO) structure and Zn solute in the hot deformation behavior of Mg-Gd-Zn alloys, the Mg-12Gd-1Zn-1Mn-0.5Zr alloy containing LPSO phase or Zn solute was hot compressed under various deformation conditions in comparison with the Zn-free Mg-12Gd-1Mn-0.5Zr alloy. The results showed that the Zn-containing alloys had stronger softening effects, larger peak stress and higher average activation energy than the Zn-free one within the safe deformation domain. Both LPSO phase and Zn solute in α-Mg matrix increased the efficiency of power dissipation, narrowed down the flow stability regions of processing map and impeded the dynamic recrystallization (DRX), especially when Zn solute was mainly in α-Mg matrix. Furthermore, the LPSO phase or Zn solute in α-Mg matrix promoted the dynamic precipitation. A few Mg5Gd particles can be observed in the Zn-free alloy, while a large number of stacking faults (SFs) and LPSO phase were precipitated in the Zn-containing alloys, and they were eventually transformed into Mg5Gd particles at low strain rate.
KW - Dynamic precipitation
KW - Dynamic recrystallization
KW - Hot deformation behavior
KW - LPSO phase
KW - Mg-Gd-Zn alloys
UR - https://www.scopus.com/pages/publications/85042098101
U2 - 10.1016/j.jallcom.2018.02.149
DO - 10.1016/j.jallcom.2018.02.149
M3 - 文章
AN - SCOPUS:85042098101
SN - 0925-8388
VL - 745
SP - 33
EP - 43
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
ER -