Molecular dynamics simulations of void shrinkage in γ-TiAl single crystal

doi:10.1016/j.commatsci.2015.05.007

	Molecular dynamics simulations of void shrinkage in γ-TiAl single crystal
	Xu, Xiao-Ting; Tang, Fu-Ling; Xue, Hong-Tao; Yu, Wei-Yuan; Zhu, Liang; Rui, Zhi-Yuan
	2015-06-03
发表期刊	Computational Materials Science
ISSN	09270256
卷号	107 页码:58-65
摘要	Abstract Molecular dynamics simulation was performed to study the shrinkage of spherical nano-void under uniaxial compression load in γ-TiAl single crystal. During the compression, the nano-void crystal undergoes elastic then plastic deformation process. In the elastic period, the nano-void shrinks linearly along compression direction while it expands linearly along the directions perpendicular to the compression direction. Finally, the nano-void collapses from all directions at the beginning of the plastic process. The formation and extension of dislocations and the shrinking mechanism of void were analyzed in detail. The dependence of the void shrinking on the specimen size, strain rate, and void volume fraction were also investigated. It is found that the stacking faults' slipping in the crystal during plastic period is the main deformation mechanism of the void shrinkage: dislocation structures initially start to nucleate around the equator area of the void, then partial dislocations and planar faults constantly propagate, finally the stacking faults and partial dislocations swap through the entire system and the void shrinks. © 2015 Elsevier B.V.
关键词	Dislocations (crystals) Molecular dynamics Shrinkage Single crystals Stacking faults Strain rate Compression directions Deformation mechanism Dislocation structures Molecular dynamics simulations Partial dislocations Specimen sizes Uni-axial compression Void volume fraction
DOI	10.1016/j.commatsci.2015.05.007
收录类别	EI ; SCIE
语种	英语
WOS研究方向	Materials Science
WOS类目	Materials Science, Multidisciplinary
WOS记录号	WOS:000356964900009
出版者	Elsevier B.V.
EI入藏号	20152300917311
EI主题词	Void fraction
EI分类号	801.4 Physical Chemistry - 933.1 Crystalline Solids - 933.1.1 Crystal Lattice - 951 Materials Science
来源库	Compendex
分类代码	801.4 Physical Chemistry - 933.1 Crystalline Solids - 933.1.1 Crystal Lattice - 951 Materials Science
引用统计	被引频次：20[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	https://ir.lut.edu.cn/handle/2XXMBERH/112431
专题	材料科学与工程学院兰州理工大学省部共建有色金属先进加工与再利用国家重点实验室实验室建设与管理处
通讯作者	Tang, Fu-Ling
作者单位	Lanzhou Univ Technol, Dept Mat Sci & Engn, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China
第一作者单位	兰州理工大学
通讯作者单位	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	Xu, Xiao-Ting,Tang, Fu-Ling,Xue, Hong-Tao,et al. Molecular dynamics simulations of void shrinkage in γ-TiAl single crystal[J]. Computational Materials Science,2015,107:58-65.
APA	Xu, Xiao-Ting,Tang, Fu-Ling,Xue, Hong-Tao,Yu, Wei-Yuan,Zhu, Liang,&Rui, Zhi-Yuan.(2015).Molecular dynamics simulations of void shrinkage in γ-TiAl single crystal.Computational Materials Science,107,58-65.
MLA	Xu, Xiao-Ting,et al."Molecular dynamics simulations of void shrinkage in γ-TiAl single crystal".Computational Materials Science 107(2015):58-65.