| Hierarchical microstructure in high Nb-containing TiAl alloy | |
| He, Neng1,2; Quan, Maohua3; Lin, Junpin4; He, Lianlong1,2; Hu, Changyi5 | |
| Corresponding Author | He, Lianlong(llhe@imr.ac.cn) ; Hu, Changyi(hcy@ipm.com.cn) |
| 2021 | |
| Source Publication | MATERIALS CHARACTERIZATION
 |
| ISSN | 1044-5803 |
| Volume | 171Pages:8 |
| Abstract | Plate-like eta-Nb(Ti,Al)(3) precipitates with hierarchical microstructure comprised of alternating arrangement of gamma-(Ti,Nb)Al and eta plates in the Ti-55Al-22Nb alloy have been investigated using transmission electron microscopy. In addition, the orientation relationship (OR) between eta precipitates and gamma matrix is determined to be tetragonal-tetragonal. The habit plane of eta precipitates is along {022) crystal planes of gamma matrix. And the interface structure between them can be described using the classical 'terrace-disconnection' theory. Furthermore, the phenomenon of phase separation responsible for the formation of this hierarchical microstructure can be well explained by the chemical free energy, that is, Al-depletion and Ti-enrichment in eta precipitate drive the splitting of eta precipitate. To the authors' knowledge, this is the first work which demonstrates such a hierarchical microstructure in eta precipitate in high Nb-containing TiAl alloy. |
| Keyword | TiAl alloy Precipitates Orientation relationship Terrace-disconnection Hierarchical microstructure Phase separation |
| Funding Organization | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, China ; National Natural Science Foundation of China |
| DOI | 10.1016/j.matchar.2020.110767 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, China[SKL-SPM-201805] ; National Natural Science Foundation of China[51831001] |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Materials Science, Characterization & Testing |
| WOS ID | WOS:000616010200002 |
| Publisher | ELSEVIER SCIENCE INC |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/160606 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | He, Lianlong; Hu, Changyi |
| Affiliation | 1.Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 3.Univ Sci & Technol Beijing, Inst Adv Mat & Technol, Beijing 10083, Peoples R China 4.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 10083, Peoples R China 5.Kunming Inst Precious Met, State Key Lab Adv Technol Comprehens Utilizat Pla, Kunming 650106, Yunnan, Peoples R China |
| Recommended Citation GB/T 7714 | He, Neng,Quan, Maohua,Lin, Junpin,et al. Hierarchical microstructure in high Nb-containing TiAl alloy[J]. MATERIALS CHARACTERIZATION,2021,171:8. |
| APA | He, Neng,Quan, Maohua,Lin, Junpin,He, Lianlong,&Hu, Changyi.(2021).Hierarchical microstructure in high Nb-containing TiAl alloy.MATERIALS CHARACTERIZATION,171,8. |
| MLA | He, Neng,et al."Hierarchical microstructure in high Nb-containing TiAl alloy".MATERIALS CHARACTERIZATION 171(2021):8. |
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