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Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing

文献类型：期刊论文

作者Zhang, Shunke2,3; Tian, Ning2,3; Li, Deyuan2; Li JH(李江华)1; Jin, Fangwei3; Wang, Guangyan3; Tian, Sugui2,3
刊名MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
出版日期2022-01-13
卷号831页码:12
ISSN号0921-5093
关键词TiAl-Nb alloy Microstructure Deformation mechanism Damage features
DOI10.1016/j.msea.2021.142094
通讯作者Tian, Ning(syhgxytn@163.com) ; Li, Deyuan(dmy1962@sina.com)
英文摘要A TiAl-Nb alloy was prepared by casting, and its tensile properties and microstructure evolution at different temperatures were investigated. The results show that the brittle-ductile transition temperature (BDTT) of the alloy is 880-920 degrees C. At low temperatures, deformation mainly occurs in the gamma lamellae and coarsening gamma phase between the lamellar colonies. As the temperature increase in the transitory stage, a small number of dislocations may pass through the interface from the coarsening gamma phase into the gamma lamellae. During the brittle stage, the dislocation and dislocation array bow out from the phase interface, and twins are emitted from the phase interface, which may contribute to the accommodation of stress concentration. During the ductile stage, the gamma lamellae coarsen due to the thinner and smaller alpha 2 lamellae dissolving and phase boundary transfer. The dislocations interact with the dislocation walls to form subboundaries in the gamma lamellae and transform into equiaxed crystals by dynamic recrystallization (DRX), which increases the plasticity of the alloy. With the transition from the brittle model to the ductile model, the fracture mode of the alloy changes from the mixed fracture mode of transgranular fracture and translaminar fracture to intergranular fracture.
分类号一类
WOS关键词DEFORMATION-BEHAVIOR
资助项目Young Science and Technology Talent Development Project of the Education Department of Guizhou Province[KY [2019] 163] ; Science and Technology Foundation Project of Guizhou Province[qiankehejichu [2020] 1Y198] ; Science and Technology Foundation Project of Guizhou Province[qiankehejichu[2019] 2870] ; Science and Technology Project of Bijie City[bikehezi [2019] 2] ; Science and Technology Project of Bijie City[bikehezi [2017] 05] ; Characteristic Key Laboratory of University of Guizhou Province[qianjiaoheKYzi [2019] 053] ; Coal & Phosphorus Chemical En-gineering Technology Center of Bijie City[[2015] 1]
WOS研究方向Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
语种英语
WOS记录号WOS:000703531400001
资助机构Young Science and Technology Talent Development Project of the Education Department of Guizhou Province ; Science and Technology Foundation Project of Guizhou Province ; Science and Technology Project of Bijie City ; Characteristic Key Laboratory of University of Guizhou Province ; Coal & Phosphorus Chemical En-gineering Technology Center of Bijie City
其他责任者Tian, Ning ; Li, Deyuan
源URL[http://dspace.imech.ac.cn/handle/311007/87483]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech LNM, Beijing 100190, Peoples R China
2.Shenyang Univ Technol, Shenyang 110870, Peoples R China;
3.Guizhou Univ Engn Sci, Bijie 551700, Peoples R China;
推荐引用方式
GB/T 7714		 Zhang, Shunke,Tian, Ning,Li, Deyuan,et al. Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2022,831:12.
APA Zhang, Shunke.,Tian, Ning.,Li, Deyuan.,李江华.,Jin, Fangwei.,...&Tian, Sugui.(2022).Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,831,12.
MLA Zhang, Shunke,et al."Microstructure evolution and fracture mechanism of a TiAl-Nb alloy during high-temperature tensile testing".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 831(2022):12.

入库方式： OAI收割

来源：力学研究所

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