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Hot deformation behavior and microstructural evolution of powder metallurgy Ti-22Al-24Nb-0.5Mo alloy
Shao, Z. J.; Li, Y.; Zhou, B.; He, X. C.; Zhang, S. Z.; Xu, L.
2020-07-01
Source PublicationMATERIALS CHARACTERIZATION
Volume165
AbstractThe hot deformation behavior and microstructural evolution of Ti-22Al-24Nb-0.5Mo alloy were investigated by compression test in the temperature range of 930 degrees C to 1050 degrees C and strain rate range of 0.001-1 s(-1). In response to temperature and strain rate, the flow stresses of true stress-strain curves increased with the decrease of temperature and increase of strain rate and multiple yielding phenomena are observed at strain rates> 0.1 s(-1). The apparent activation energies in the low temperature (alpha(2) + B2 + O) and high temperature (alpha(2) + B2) phase regions are estimated to be 700 kJ/mol and 417 kJ/mol, respectively. There are three suitable domains for hot working in processing map, in which the alloy has fine grains and continuous dynamic recrystallization accompanying by the globularization of O phase. In two instability domains, discontinuous dynamic recrystallization and strong interactions of secondary phases and dislocations occurred. This short-term imbalance between dynamic softening and work hardening is responsible for the multiple yielding behavior.
DOI10.1016/j.matchar.2020.110376
WOS IDWOS:000541742100015
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Document Type期刊论文
Identifierhttp://ir.imr.ac.cn/handle/321006/82734
Collection中国科学院金属研究所
Recommended Citation
GB/T 7714
Shao, Z. J.,Li, Y.,Zhou, B.,et al. Hot deformation behavior and microstructural evolution of powder metallurgy Ti-22Al-24Nb-0.5Mo alloy[J]. MATERIALS CHARACTERIZATION,2020,165.
APA Shao, Z. J.,Li, Y.,Zhou, B.,He, X. C.,Zhang, S. Z.,&Xu, L..(2020).Hot deformation behavior and microstructural evolution of powder metallurgy Ti-22Al-24Nb-0.5Mo alloy.MATERIALS CHARACTERIZATION,165.
MLA Shao, Z. J.,et al."Hot deformation behavior and microstructural evolution of powder metallurgy Ti-22Al-24Nb-0.5Mo alloy".MATERIALS CHARACTERIZATION 165(2020).
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