Mechanism of thermal exposure on the mechanical properties of microtextured Ti60 alloys

doi:10.1016/j.msea.2024.146989

IMR OpenIR

	Mechanism of thermal exposure on the mechanical properties of microtextured Ti60 alloys
	Wang, Boning 1,4,5; Zeng, Weidong 1,4,5; Zhao, Zibo 2,3; Jia, Runchen 1,4,5; Xu, Jianwei 1,4,5; Wang, Qingjiang 2,3
通讯作者	Zeng, Weidong(zengwd@nwpu.edu.cn) ; Zhao, Zibo(zengwd@nwpu.edu.cn)
	2024-10-01
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	912 页码:11
摘要	In this study, the mechanism of thermal exposure on the mechanical properties of two Ti60 alloys with different micro-texture regions (MTRs) was systematically investigated through macro- and microstructural characterization. It was found that when the alloy was exposed to prolonged thermal exposure at 600 degrees C for 100 h, the strength of the no-MTR samples increased significantly and the plasticity decreased sharply. In contrast, the MTR samples showed a sharp decrease in strength and plasticity due to the transmissibility of dislocation slip and crack propagation, resulting in the formation of a continuous brittle cleavage plane on the fracture. Meanwhile, the oxide film formed on the surface promotes the formation of early cracks and cleavage planes, and the oxide film serves as the location of surface crack nuclei and creates a notch effect leading to premature fracture of the alloy. It is further found that the oxide film is mainly composed of alternating nanocrystalline grains of Al2O3 and TiO2, and there is an oxygen-rich layer of Ti3O near the matrix, and these nano-oxides increased the brittleness of the oxide film. The strengthening and embrittlement mechanism of the alloy was revealed based on the deformation characteristics, i.e. the plasticity reduction was attributed to the formation of the oxide film and precipitation of the alpha 2 phase on the surface, whereas the inhomogeneous distribution of the alpha 2 phase in the interior led to the formation of microcracks in the interior. The precipitation of (Ti, Zr)6Si3 phase at grain boundaries hinders the dislocation motion and leads to a significant increase in the strength of No-MTR alloys. This study reveals the effects of interactions between MTRs, oxide films and precipitated phases on the thermal exposure properties of Ti60 alloys, providing theoretical support for the stability of titanium alloy properties at elevated temperatures.
关键词	Ti60 alloy Micro-texture region Thermal exposure Oxide film Precipitation phase
资助者	National Major Science and Technology Project ; Construction of Scientists + Engineers Team in Qinchuangyuan, Shaanxi Province ; Youth Innovation Promotion Association CAS
DOI	10.1016/j.msea.2024.146989
收录类别	SCI
语种	英语
资助项目	National Major Science and Technology Project[J2019-VI-0005-0119] ; Construction of Scientists + Engineers Team in Qinchuangyuan, Shaanxi Province[2022KXJ-079] ; Youth Innovation Promotion Association CAS[2020193]
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:001281674300001
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：1[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/321006/188667
专题	中国科学院金属研究所
通讯作者	Zeng, Weidong; Zhao, Zibo
作者单位	1.Northwestern Polytech Univ, Sch Mat Sci & Engn, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi chang xu Innovat Ctr Adv Mat, 72 Wenhua Rd, Shenyang 110016, Peoples R China 4.Northwestern Polytech Univ, Def Technol Innovat Ctr Precis Forging & Ring Roll, Sch Mat Sci & Engn, Xian 710072, Peoples R China 5.Northwestern Polytech Univ, Shaanxi Key Lab High Performance Precis Forming Te, Xian 710072, Peoples R China
推荐引用方式 GB/T 7714	Wang, Boning,Zeng, Weidong,Zhao, Zibo,et al. Mechanism of thermal exposure on the mechanical properties of microtextured Ti60 alloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2024,912:11.
APA	Wang, Boning,Zeng, Weidong,Zhao, Zibo,Jia, Runchen,Xu, Jianwei,&Wang, Qingjiang.(2024).Mechanism of thermal exposure on the mechanical properties of microtextured Ti60 alloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,912,11.
MLA	Wang, Boning,et al."Mechanism of thermal exposure on the mechanical properties of microtextured Ti60 alloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 912(2024):11.