Fatigue Crack Propagation Mechanism of γ-TiAl Alloy under Different Strain Ratios

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	Fatigue Crack Propagation Mechanism of γ-TiAl Alloy under Different Strain Ratios
	Feng, Ruicheng1,2 ; Lu, Jiantao 1,2; Li, Haiyan1,2 ; Cao, Hui1,2 ; Yan, Feng 1,2; Si, Huangteng 1,2
	2018-09-01
发表期刊	Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering
ISSN	1002185X
卷号	47 期号:9 页码:2821-2826
摘要	The mechanism of fatigue crack propagation of γ-TiAl alloy under different strain ratios was studied using the molecular dynamics method. The results show that a fatigue crack propagates in the manner of cleavage firstly, and then propagates through disordered region by driving force. Finally, it changes into sub-main crack mechanisms. The difference is that the change in the mode of crack propagation occurs at different time under different strain ratios. At the stage of plastic deformation, dislocations emit at different time and glide at different planes due to different strain ratios. Defects, such as vacancies, divacancies, and trivacancies, are generated during dislocation gliding. Meanwhile, stacking faults are generated along the different close-packed planes under different strain ratios. © 2018, Science Press. All right reserved./Copyright © 2018, Northwest Institute for Nonferrous Metal Research. Published by Elsevier BV. All rights reserved.
关键词	Fatigue crack propagation Fatigue of materials Molecular dynamics Stacking faults Titanium alloys Close-packed planes Different planes Disordered regions Driving forces Gamma tial alloys Molecular dynamics methods Strain ratios TiAl alloy
收录类别	SCI
语种	中文
出版者	Science Press
EI入藏号	20190406406904
EI主题词	Cracks
EI分类号	542.3 Titanium and Alloys - 801.4 Physical Chemistry - 933.1.1 Crystal Lattice - 951 Materials Science
来源库	Compendex
分类代码	542.3 Titanium and Alloys - 801.4 Physical Chemistry - 933.1.1 Crystal Lattice - 951 Materials Science
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/114744
专题	机电工程学院土木工程学院
作者单位	1.Lanzhou University of Technology, Lanzhou; 730050, China; 2.Key Laboratory of Digital Manufacturing Technology and Application, Ministry of Education, 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	Feng, Ruicheng,Lu, Jiantao,Li, Haiyan,et al. Fatigue Crack Propagation Mechanism of γ-TiAl Alloy under Different Strain Ratios[J]. Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,2018,47(9):2821-2826.
APA	Feng, Ruicheng,Lu, Jiantao,Li, Haiyan,Cao, Hui,Yan, Feng,&Si, Huangteng.(2018).Fatigue Crack Propagation Mechanism of γ-TiAl Alloy under Different Strain Ratios.Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering,47(9),2821-2826.
MLA	Feng, Ruicheng,et al."Fatigue Crack Propagation Mechanism of γ-TiAl Alloy under Different Strain Ratios".Xiyou Jinshu Cailiao Yu Gongcheng/Rare Metal Materials and Engineering 47.9(2018):2821-2826.