TY - JOUR
T1 - Investigating the hot deformation behavior and microstructural evolution of Mo-14Re alloy at various strains and strain rates
AU - Li, Yanchao
AU - Liu, Wenbin
AU - Li, Jianfeng
AU - Lin, Xiaohui
AU - Liang, Jing
AU - Yang, Yichao
AU - Zhang, Xin
AU - Zhang, Wen
AU - Xu, Hailong
N1 - Publisher Copyright:
© 2024
PY - 2024/11/1
Y1 - 2024/11/1
N2 - This study examines the hot deformation behavior of Mo-14Re alloy at various true strains (15%, 35%, 65%) and strain rates (0.01 s−1, 10 s−1) at a temperature of 1400K. The findings indicate that dynamic recovery (DRV) and dynamic recrystallization (DRX) occur concomitantly as strain increases at a low strain rate of 0.01 s−1, with DRV being the predominant softening mechanism. At a strain of 65%, DRX emerges as the primary softening process. Conversely, under high strain rates of 10 s−1, DRX is inhibited, and the Mo-14Re alloy experiences work hardening due to an increase in dislocation density. Microscopic analysis shows that the high-density dislocations facilitate the continued nucleation and growth of recrystallized grains at low strain rates. At high strain rates, tangled dislocations hinder dislocation motion and recrystallization. Regarding texture evolution, stronger {100}//CD and weaker {111}//CD fiber texture is observed at low strain rates of 0.01 s−1, while stronger {111}//CD and weaker {100}//CD fiber texture forms at high strain rates of 10 s−1, with enhanced texture intensity. Mechanistic analysis confirms the activation of the {110}<111>, {112}<111>, and {123}<111> dislocation slip systems at elevated temperatures, with the {123}<111> system being the most dominant.
AB - This study examines the hot deformation behavior of Mo-14Re alloy at various true strains (15%, 35%, 65%) and strain rates (0.01 s−1, 10 s−1) at a temperature of 1400K. The findings indicate that dynamic recovery (DRV) and dynamic recrystallization (DRX) occur concomitantly as strain increases at a low strain rate of 0.01 s−1, with DRV being the predominant softening mechanism. At a strain of 65%, DRX emerges as the primary softening process. Conversely, under high strain rates of 10 s−1, DRX is inhibited, and the Mo-14Re alloy experiences work hardening due to an increase in dislocation density. Microscopic analysis shows that the high-density dislocations facilitate the continued nucleation and growth of recrystallized grains at low strain rates. At high strain rates, tangled dislocations hinder dislocation motion and recrystallization. Regarding texture evolution, stronger {100}//CD and weaker {111}//CD fiber texture is observed at low strain rates of 0.01 s−1, while stronger {111}//CD and weaker {100}//CD fiber texture forms at high strain rates of 10 s−1, with enhanced texture intensity. Mechanistic analysis confirms the activation of the {110}<111>, {112}<111>, and {123}<111> dislocation slip systems at elevated temperatures, with the {123}<111> system being the most dominant.
KW - Deformation mechanism
KW - Dynamic recrystallization
KW - Hot-compression
KW - Mo-14Re
KW - Texture evolution
UR - http://www.scopus.com/inward/record.url?scp=85203867566&partnerID=8YFLogxK
U2 - 10.1016/j.jmrt.2024.09.094
DO - 10.1016/j.jmrt.2024.09.094
M3 - 文章
AN - SCOPUS:85203867566
SN - 2238-7854
VL - 33
SP - 640
EP - 651
JO - Journal of Materials Research and Technology
JF - Journal of Materials Research and Technology
ER -