Acoustic Emission Response to Nano-Cutting Process of Monocrystal γ-TiAl Alloy via Atomistic Simulation

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	Acoustic Emission Response to Nano-Cutting Process of Monocrystal γ-TiAl Alloy via Atomistic Simulation
	Yao, Yongjun 1; Feng, Ruicheng1,2 ; Zhang, Jun 1; Cao, Hui1,2 ; Li, Haiyan1,2 ; Lei, Chunli1,2
	2022-07-01
发表期刊	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
ISSN	1002-185X
卷号	51 期号:7 页码:2467-2474
摘要	In this paper, the acoustic emission (AE) response of monocrystal γ-TiAl alloy during nano-cutting process was studied by molecular dynamics method. The mechanism of crack formation in the cutting process of monocrystal γ-TiAl alloy was described at the atomic scale. It is found that periodic shear bands are formed in the shear zone with the continuous increase of cutting force at the beginning of cutting. At the same time, under the combined action of high pressure stress and elastic stress wave, the formation of the amorphous atomic band in the grain-like grain boundary blocks the continuous emission of the shear band, so that the stress in the main shear zone can not be released through the shear band in time, resulting in local stress concentration, which leads to the initiation and propagation of cracks. By analyzing the collected acoustic emission signal, it is found that the compressive stress contributes to the decrease of acoustic emission power in cutting process. In the time domain, the acoustic emission response characteristics of lattice vibration, shear band and crack initiation and propagation in nano-cutting process were described by analyzing the microdefect evolution and AE power-frequency comparison. At the same time, the power and frequency characteristics of damage were obtained by clustering analysis. © 2022 Rare Metals Materials and Engineering Press. All rights reserved.
关键词	Acoustic emission testing Compressive stress Cracks Cutting tools Grain boundaries Shear bands Shear flow Time domain analysis Titanium alloys Vibration analysis Acoustic-emissions Atomistic simulations Cutting process Emission power Molecular dynamics methods Mono-crystals Monocrystal γ-tial alloy Nano cutting Shear zone TiAl alloy
收录类别	EI
语种	英语
出版者	Science Press
EI入藏号	20223912806041
EI主题词	Molecular dynamics
EI分类号	542.3 Titanium and Alloys ; 603.2 Machine Tool Accessories ; 631.1 Fluid Flow, General ; 751.2 Acoustic Properties of Materials ; 801.4 Physical Chemistry ; 921 Mathematics
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/160067
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	Yao, Yongjun,Feng, Ruicheng,Zhang, Jun,et al. Acoustic Emission Response to Nano-Cutting Process of Monocrystal γ-TiAl Alloy via Atomistic Simulation[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2022,51(7):2467-2474.
APA	Yao, Yongjun,Feng, Ruicheng,Zhang, Jun,Cao, Hui,Li, Haiyan,&Lei, Chunli.(2022).Acoustic Emission Response to Nano-Cutting Process of Monocrystal γ-TiAl Alloy via Atomistic Simulation.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,51(7),2467-2474.
MLA	Yao, Yongjun,et al."Acoustic Emission Response to Nano-Cutting Process of Monocrystal γ-TiAl Alloy via Atomistic Simulation".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 51.7(2022):2467-2474.