Hierarchical microstructure in high Nb-containing TiAl alloy

doi:10.1016/j.matchar.2020.110767

IMR OpenIR

	Hierarchical microstructure in high Nb-containing TiAl alloy
	He, Neng 1,2; Quan, Maohua 3; Lin, Junpin 4; He, Lianlong 1,2; Hu, Changyi 5
通讯作者	He, Lianlong(llhe@imr.ac.cn) ; Hu, Changyi(hcy@ipm.com.cn)
	2021
发表期刊	MATERIALS CHARACTERIZATION
ISSN	1044-5803
卷号	171 页码:8
摘要	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.
关键词	TiAl alloy Precipitates Orientation relationship Terrace-disconnection Hierarchical microstructure Phase separation
资助者	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
收录类别	SCI
语种	英语
资助项目	State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, China[SKL-SPM-201805] ; National Natural Science Foundation of China[51831001]
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:000616010200002
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/321006/160606
专题	中国科学院金属研究所
通讯作者	He, Lianlong; Hu, Changyi
作者单位	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
推荐引用方式 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.