Effect of Hole Size on Single Crystal γ-TiAl Alloy Crack Propagation Based on Molecular Dynamics Simulation

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	Effect of Hole Size on Single Crystal γ-TiAl Alloy Crack Propagation Based on Molecular Dynamics Simulation
	Rui, Zhiyuan 1,2; Cao, Hui 1,2; Luo, Dechun 1,2; Chen, Wenke 1; Yang, Li 1,2; Yan, Changfeng 1,2
刊名	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
	2017-09-01
卷号	46 期号:9 页码:2505-2511
关键词	Crack propagation Deformation Fracture Molecular dynamics Single crystals Stress-strain curves Titanium alloys Atomic trajectories Energy evolutions Gamma tial alloys Hole size Molecular dynamics methods Molecular dynamics simulations Stress and strain TiAl alloy
ISSN号	1002185X
英文摘要	Molecular dynamics method has been applied to research the process of crack propagation of single crystal γ-TiAl. The atomic trajectory figure, energy evolution and the relationship between stress and strain were obtained to study the hole size effect. The results indicate that the initiation stress decreases with hole size increasing. After the crack combines with the hole, when R=0.4001 nm, crack occurs at the center of hole boundary after hole deformation, and it propagates along the direction of [100] until material fracture, and mother-child model is found; when R=0.8002 nm, crack occurs at one corner after hole deformation, and it propagates along the direction of [100] until material fracture; when R=1.2003 nm, crack occurs at two corners after hole deformation, and it propagates along the direction of [110] and[110], mother-child model is found at the direction of [110], and child crack occurs at boundary which combines with crack in this direction and propagates until material fracture. In addition the crack propagation is inhibited by the hole. © 2017, Science Press. All right reserved.
语种	中文
出版者	Science Press
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114059]
专题	机电工程学院土木工程学院马克思主义学院
作者单位	1.Lanzhou University of Technology, Lanzhou; 730050, China; 2.Digital Manufacturing Technology and Application of Key Laboratory of the Ministry of Education, Mechanical and Electrical Engineering College, Lanzhou University of Technology, Lanzhou; 730050, China
推荐引用方式 GB/T 7714	Rui, Zhiyuan,Cao, Hui,Luo, Dechun,et al. Effect of Hole Size on Single Crystal γ-TiAl Alloy Crack Propagation Based on Molecular Dynamics Simulation[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2017,46(9):2505-2511.
APA	Rui, Zhiyuan,Cao, Hui,Luo, Dechun,Chen, Wenke,Yang, Li,&Yan, Changfeng.(2017).Effect of Hole Size on Single Crystal γ-TiAl Alloy Crack Propagation Based on Molecular Dynamics Simulation.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,46(9),2505-2511.
MLA	Rui, Zhiyuan,et al."Effect of Hole Size on Single Crystal γ-TiAl Alloy Crack Propagation Based on Molecular Dynamics Simulation".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 46.9(2017):2505-2511.