Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure

doi:10.1016/j.intermet.2022.107733

IMR OpenIR

	Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure
	Liu, Yan 1; Tang, Bin 1,2; Huang, Xiaoyu 2; Zhu, Lei 1; Liu, Dong 3; Yang, Rui 3; Li, Jinshan 1,2
通讯作者	Tang, Bin(toby@nwpu.edu.cn) ; Huang, Xiaoyu(stewarthxy@hotmail.com)
	2022-12-01
发表期刊	INTERMETALLICS
ISSN	0966-9795
卷号	151 页码:9
摘要	In this work, a modulated structure composed of nano-scale Ti2AlNb (O phase) and alpha 2 phase was obtained in middle Nb gamma-TiAl alloy. The O phase nucleates at the alpha 2/gamma interface and is orthogonal to the alpha 2/gamma interface. The creep testing results show that the modulated structure exhibited the better creep performance compared with the fully lamellar microstructure, manifesting in a smaller minimum creep rate and creep strain after creep for 200 h. The O phase in alpha 2 lamellae suppressed the alpha 2 ->gamma phase transformation and constructed the coherent interface with adjacent gamma lamellae, which replaced part of the semi coherent alpha 2/gamma interface, to reduce the generation of interfacial dislocation loops, thereby improving the creep resistance. Besides, discontinuous precipitations (DPs) caused by (alpha 2/gamma) -> beta 0(omega 0) + gamma phase transformation were observed in the crept samples, contributing to the microstructure degradation. The present work shows significant engineering significance and scientific value for improving the creep performance and microstructure stability for middle Nb-TiAl alloys.
关键词	TiAl alloys Creep property O phase TEM Microstructure stability
资助者	National Key Research and Devel- opment Program of China ; National Natural Science Foundation of China ; (Research Fund of the State Key Laboratory of Solidification Processing, NPU) , China
DOI	10.1016/j.intermet.2022.107733
收录类别	SCI
语种	英语
资助项目	National Key Research and Devel- opment Program of China ; National Natural Science Foundation of China ; (Research Fund of the State Key Laboratory of Solidification Processing, NPU) , China ; [2021YFB3702603] ; [52174377] ; [2022 -TS -06]
WOS研究方向	Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000867284000002
出版者	ELSEVIER SCI LTD
引用统计	被引频次：7[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/321006/176313
专题	中国科学院金属研究所
通讯作者	Tang, Bin; Huang, Xiaoyu
作者单位	1.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Shaanxi, Peoples R China 2.Northwestern Polytech Univ, Chongqing Innovat Ctr, Chongqing 401135, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Liu, Yan,Tang, Bin,Huang, Xiaoyu,et al. Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure[J]. INTERMETALLICS,2022,151:9.
APA	Liu, Yan.,Tang, Bin.,Huang, Xiaoyu.,Zhu, Lei.,Liu, Dong.,...&Li, Jinshan.(2022).Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure.INTERMETALLICS,151,9.
MLA	Liu, Yan,et al."Microstructural stability and creep properties of middle Nb ?-TiAl alloy with a modulated microstructure".INTERMETALLICS 151(2022):9.