| 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 | |
| Corresponding Author | Zhang, S. Z.(szzhangyt@163.com) |
| 2020-07-01 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 165Pages:10 |
| Abstract | 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. |
| Keyword | Ti-22Al-24Nb-0.5Mo alloy Hot deformation Multiple yielding Microstructure evolution Apparent activation energies Processing map |
| Funding Organization | Natural Science Foundation of Shandong Province, China ; Shandong Major Scientific and Technological Innovation Program, China |
| DOI | 10.1016/j.matchar.2020.110376 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Natural Science Foundation of Shandong Province, China[ZR2019MEM012] ; Shandong Major Scientific and Technological Innovation Program, China[2019JZZY010325] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000541742100015 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/139403 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, S. Z. |
| Affiliation | 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 |
| 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,2020,165:10. |
| 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. |
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