TY - JOUR
T1 - Understanding the hot deformation behavior of Mo–42Re alloy
T2 - Insights from strain rate sensitivity, microstructure, and misorientation
AU - Yang, Yichao
AU - Jiao, Benqi
AU - Li, Yaxin
AU - Li, Yanchao
AU - Liu, Wenbin
AU - Zhang, Xin
AU - Lin, Xiaohui
AU - Huang, Li
AU - Liang, Jing
AU - Xue, Jianrong
AU - Chen, Biao
AU - Zhang, Wen
N1 - Publisher Copyright:
© 2024
PY - 2024/8
Y1 - 2024/8
N2 - Mo–42Re alloy, as a high-temperature structural and functional material, has broad application prospects in the nuclear industry. In this study, the hot deformation behavior of Mo–42Re alloy was systematically investigated using hot compression tests and electron backscatter diffraction (EBSD) techniques in the temperature range of 1200–1500 °C and strain rate range of 0.001–1 s−1. The results showed that the flow stress of Mo–42Re alloy exhibited a strong dependence on temperature and strain rate. The strain rate sensitivity index (m-value) was high under the conditions of 1350–1450 °C and 0.001 s−1. With increasing deformation temperature and decreasing strain rate, dynamic recrystallization (DRX) was significantly promoted, and the recrystallized volume fraction increased from 2.79% at 1200 °C/1 s−1 to 20.3% at 1500 °C/0.001 s−1. Meanwhile, the occurrence of and DRX effectively reduced the grain reference orientation deviation (GROD) gradients and kernel average misorientation (KAM) levels within the grains. This study revealed the mechanisms of microstructural evolution during hot deformation of Mo–42Re alloy, providing important guidance for optimizing its thermomechanical processing parameters.
AB - Mo–42Re alloy, as a high-temperature structural and functional material, has broad application prospects in the nuclear industry. In this study, the hot deformation behavior of Mo–42Re alloy was systematically investigated using hot compression tests and electron backscatter diffraction (EBSD) techniques in the temperature range of 1200–1500 °C and strain rate range of 0.001–1 s−1. The results showed that the flow stress of Mo–42Re alloy exhibited a strong dependence on temperature and strain rate. The strain rate sensitivity index (m-value) was high under the conditions of 1350–1450 °C and 0.001 s−1. With increasing deformation temperature and decreasing strain rate, dynamic recrystallization (DRX) was significantly promoted, and the recrystallized volume fraction increased from 2.79% at 1200 °C/1 s−1 to 20.3% at 1500 °C/0.001 s−1. Meanwhile, the occurrence of and DRX effectively reduced the grain reference orientation deviation (GROD) gradients and kernel average misorientation (KAM) levels within the grains. This study revealed the mechanisms of microstructural evolution during hot deformation of Mo–42Re alloy, providing important guidance for optimizing its thermomechanical processing parameters.
KW - Dynamic recrystallization
KW - Hot deformation
KW - Mo–42Re alloy
KW - Strain rate sensitivity
UR - http://www.scopus.com/inward/record.url?scp=85194564616&partnerID=8YFLogxK
U2 - 10.1016/j.ijrmhm.2024.106741
DO - 10.1016/j.ijrmhm.2024.106741
M3 - 文章
AN - SCOPUS:85194564616
SN - 0263-4368
VL - 122
JO - International Journal of Refractory Metals and Hard Materials
JF - International Journal of Refractory Metals and Hard Materials
M1 - 106741
ER -