Hot deformation behavior and microstructural evolution of powder metallurgy Ti-22Al-24Nb-0.5Mo alloy

doi:10.1016/j.matchar.2020.110376

IMR OpenIR

	Hot deformation behavior and microstructural evolution of powder metallurgy Ti-22Al-24Nb-0.5Mo alloy
	Shao, Z. J.1; Li, Y.1,2; Zhou, B.1; He, X. C.1; Zhang, S. Z.1,2; Xu, L.3
通讯作者	Zhang, S. Z.(szzhangyt@163.com)
	2020-07-01
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	165 页码:10
摘要	The 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.
关键词	Ti-22Al-24Nb-0.5Mo alloy Hot deformation Multiple yielding Microstructure evolution Apparent activation energies Processing map
资助者	Natural Science Foundation of Shandong Province, China ; Shandong Major Scientific and Technological Innovation Program, China
DOI	10.1016/j.matchar.2020.110376
收录类别	SCI
语种	英语
资助项目	Natural Science Foundation of Shandong Province, China[ZR2019MEM012] ; Shandong Major Scientific and Technological Innovation Program, China[2019JZZY010325]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing
WOS记录号	WOS:000541742100015
出版者	ELSEVIER SCIENCE INC
引用统计	被引频次：2[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/139403
专题	中国科学院金属研究所
通讯作者	Zhang, S. Z.
作者单位	1.Yantai Univ, Sch Nucl Equipment & Nucl Engn, Yantai 264005, Peoples R China 2.Yantai Univ, Inst Adv Studies Precis Mat, Yantai 264005, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 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,2020,165:10.
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,165,10.
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):10.