Acoustic Emission Response on Effect of Voids on Fracture Behavior of Bicrystal TiAl Alloy

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	Acoustic Emission Response on Effect of Voids on Fracture Behavior of Bicrystal TiAl Alloy
	Fan, Lihe 1; Feng, Ruicheng1,2 ; Yao, Yongjun 1; Cao, Hui1,2 ; Li, Haiyan1,2 ; Lei, Chunli1,2
	2022-08-01
发表期刊	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
ISSN	1002-185X
卷号	51 期号:8 页码:2923-2932
摘要	Based on the molecular dynamics method, the uniaxial tensile simulation of the bicrystal TiAl alloy containing voids was performed. The evolution behavior of defects and acoustic emission (AE) response on the deformation of TiAl alloy and fracture of the TiAl alloy were studied at nanometer scale. The results show that the size and location of the voids have little influence on the elastic modulus of the TiAl alloy and the yield strength decreases with the increase of the void size. After plastic deformation, twi n boundary can block dislocation emitted continuously at the edge of void, and increase crystal strength. When yield stress is reac hed, the TiAl alloy with voids at grain boundary is more likely to produce stable dislocation structure, which hinders the movement of other dislocati ons, thus improving the crystal strength. Through the analysis of the AE signals during the stretching pro cess, it is found that the AE signals mainly come from lattice vibration, and has a large power range and a lower median frequency. The AE signals of dislocation slip rev eal the characteristics of wide frequency domain, and the AE signals of dislocation pr oliferation and dislocation accumulation display the characteristics of low power. The AE signals of crack propagation belongs to the burst signal, which is characterized by high frequency and high power. © 2022 Rare Metals Materials and Engineering Press. All rights reserved.
关键词	Acoustic emission testing Aluminum alloys Binary alloys Frequency domain analysis Grain boundaries Titanium alloys Vibration analysis Yield stress Acoustic emission signal Acoustic-emissions Crystal strength Effect of voids Fracture behavior Grain-boundaries Molecular dynamics methods TiAl alloy Uniaxial tensile Void
收录类别	EI
语种	中文
出版者	Science Press
EI入藏号	20223912804638
EI主题词	Molecular dynamics
EI分类号	541.2 Aluminum Alloys ; 542.3 Titanium and Alloys ; 751.2 Acoustic Properties of Materials ; 801.4 Physical Chemistry ; 921.3 Mathematical Transformations ; 951 Materials Science
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/160083
专题	机电工程学院土木工程学院
作者单位	1.School of Mechanical and Electronical Engineering, Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, Lanzhou University of Technology, Lanzhou; 730050, China
第一作者单位	兰州理工大学
第一作者的第一单位	兰州理工大学
推荐引用方式 GB/T 7714	Fan, Lihe,Feng, Ruicheng,Yao, Yongjun,et al. Acoustic Emission Response on Effect of Voids on Fracture Behavior of Bicrystal TiAl Alloy[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2022,51(8):2923-2932.
APA	Fan, Lihe,Feng, Ruicheng,Yao, Yongjun,Cao, Hui,Li, Haiyan,&Lei, Chunli.(2022).Acoustic Emission Response on Effect of Voids on Fracture Behavior of Bicrystal TiAl Alloy.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,51(8),2923-2932.
MLA	Fan, Lihe,et al."Acoustic Emission Response on Effect of Voids on Fracture Behavior of Bicrystal TiAl Alloy".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 51.8(2022):2923-2932.