Mechanism of microstructure evolution and mechanical properties of high Nb-TiAl alloy in transition zone of laser-deposited Ti60/TiAl alloys

doi:10.1016/j.msea.2024.147726

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	Mechanism of microstructure evolution and mechanical properties of high Nb-TiAl alloy in transition zone of laser-deposited Ti60/TiAl alloys
	Ding, Jie 1; Chen, Feng 1; Deng, Qinghua 1; Li, Ruifeng 1; Xu, Shuai 2; Yang, Liang 3; Lin, Junpin 4; Chang, Hui 1
通讯作者	Ding, Jie(dingjie0122@sina.cn) ; Chang, Hui()
	2025-02-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	923 页码:11
摘要	The transition zone of the Ti/TiAl alloy with a nominal composition of TiAl-5.5Nb was fabricated using laser melting deposition (LMD) of a powder mixture consisting of 30 % Ti60 and 70 % Ti-45Al-8Nb (wt. %). The microstructural evolution and mechanical properties were investigated. Upon thermal exposure at 650 degrees C and 800 degrees C, three distinct types of gamma phase were observed: gamma lamellae, gamma blocks, and nanoscale gamma clusters. Additionally, nanoscale omega particles were observed to coarsen at 650 degrees C, while they dissolved into the B2 phase after exposure at 800 degrees C. Notably, the tensile strength, yield strength, and plastic elongation of the specimens were significantly improved by 25.5 %, 23.9 %, and 47.2 %, respectively, following thermal exposure at 800 degrees C. This enhancement was attributed to the dissolution of omega particles and the subsequent precipitation of gamma blocks.
关键词	High Nb-Containing TiAl alloy Microstructure evolution Mechanical properties Laser melting deposition
资助者	Na-tional Science Foundation for Young Scientists of China ; National Key Research and Development Program of China ; State Key Laboratory of Solidification Processing in NPU ; Natural Science Foundation of Chongqing ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
DOI	10.1016/j.msea.2024.147726
收录类别	SCI
语种	英语
资助项目	Na-tional Science Foundation for Young Scientists of China[52001164] ; Na-tional Science Foundation for Young Scientists of China[52301173] ; National Key Research and Development Program of China[2021YFB3700502] ; State Key Laboratory of Solidification Processing in NPU[SKLSP202215] ; Natural Science Foundation of Chongqing[CSTB2023NSCQ-MSX0972] ; Priority Academic Program Development of Jiangsu Higher Education Institutions (PAPD)
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:001410211600001
出版者	ELSEVIER SCIENCE SA
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/180640
专题	中国科学院金属研究所
通讯作者	Ding, Jie; Chang, Hui
作者单位	1.Nanjing Tech Univ, Tech Inst Adv Mat, Coll Mat Sci & Engn, Nanjing 210009, Peoples R China 2.Southwest Univ, Sch Mat & Energy, Chongqing 400715, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China
推荐引用方式 GB/T 7714	Ding, Jie,Chen, Feng,Deng, Qinghua,et al. Mechanism of microstructure evolution and mechanical properties of high Nb-TiAl alloy in transition zone of laser-deposited Ti60/TiAl alloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2025,923:11.
APA	Ding, Jie.,Chen, Feng.,Deng, Qinghua.,Li, Ruifeng.,Xu, Shuai.,...&Chang, Hui.(2025).Mechanism of microstructure evolution and mechanical properties of high Nb-TiAl alloy in transition zone of laser-deposited Ti60/TiAl alloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,923,11.
MLA	Ding, Jie,et al."Mechanism of microstructure evolution and mechanical properties of high Nb-TiAl alloy in transition zone of laser-deposited Ti60/TiAl alloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 923(2025):11.