Effects of Twin Boundary on Tensile Properties and Deformation Mechanism of Ni-Co Alloy Nanopillars

doi:10.1002/pssb.202100458

CORC > 兰州理工大学 > 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

	Effects of Twin Boundary on Tensile Properties and Deformation Mechanism of Ni-Co Alloy Nanopillars
	Gao, Qing; Chen, Xiaotong; Yang, Panfeng; Xue, Hongtao; Ding, Yutian; Lu, Xuefeng
刊名	PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS
	2021
卷号	259 期号:3
关键词	molecular dynamic simulation Ni-Co alloy nanopillars tensile deformation twin grain boundaries
ISSN号	0370-1972
DOI	10.1002/pssb.202100458
英文摘要	The influence mechanism of twin boundary in Ni-Co alloys is responsible for their deformation and technological applications. Herein, the uniaxial tensile loading of the Ni-Co single crystal nanopillars with twin boundaries is carried out by simulation. When the number of twin boundaries exceeds two layers, the effect of twinning boundary on dislocation is obvious, and the migration and reaction of twin boundaries lead to an increase in the number of dislocations accommodated inside, which is conducive to increasing the strength of the nanopillars. At low temperature, the dislocations are easy to penetrate and expand the twin grain boundary, while at high temperature, due to the aggravation of thermal motion, the resulting dislocations decrease. Meantime, the reaction between dislocations and twin boundaries leads to the disappearance of some original twin grain boundaries. As the strain rate increases, the main deformation mode of the nanopillar changes from the reaction of dislocation and twin boundary to twin boundaries migration. When the volume ratio of grain boundary void is less than 2.3%, the plastic deformation fluctuation is relatively stable. Nevertheless, when the volume ratio is greater than or equal to 2.3%, the fluctuation of the plastic deformation stage decreases rapidly.
WOS研究方向	Physics
语种	英语
出版者	WILEY-V C H VERLAG GMBH
WOS记录号	WOS:000728716300001
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/154949]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Dept Mat Sci & Engn, Lanzhou 730050, Peoples R China
推荐引用方式 GB/T 7714	Gao, Qing,Chen, Xiaotong,Yang, Panfeng,et al. Effects of Twin Boundary on Tensile Properties and Deformation Mechanism of Ni-Co Alloy Nanopillars[J]. PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS,2021,259(3).
APA	Gao, Qing,Chen, Xiaotong,Yang, Panfeng,Xue, Hongtao,Ding, Yutian,&Lu, Xuefeng.(2021).Effects of Twin Boundary on Tensile Properties and Deformation Mechanism of Ni-Co Alloy Nanopillars.PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS,259(3).
MLA	Gao, Qing,et al."Effects of Twin Boundary on Tensile Properties and Deformation Mechanism of Ni-Co Alloy Nanopillars".PHYSICA STATUS SOLIDI B-BASIC SOLID STATE PHYSICS 259.3(2021).