Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage

IMR OpenIR

	Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage
	Yang, JH ; Zhang, XP ; Mai, YW ; Li, Y
通讯作者	Yang, JH(jihong.yahg@aeromech.usyd.edu.au)
	2005
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	41 期号:1 页码:9-14
摘要	SEM-ECC technique was employed to observe and characterize the dislocation microstructures during the saturation stage of cyclic deformations in a copper single crystal. Some band-like or spot-like dark zones were found in the dislocation microstructures, which located either at the edge region of the deformed specimen or at the interface between the dislocation matrix and the PSB. To interpret the experiment results, the near surface dislocation microstructure were simulated and the internal stress distributions induced by those dislocations were calculated by using discrete dislocation dynamics method. The simulation results show that near the free surface region, the maximum internal stresses or stress concentration, appear at the dark zones which correspond to the interfaces between the PSB and the dislocation matrix or the PSB-matrix-surface interfaces, meaning that fatigue cracks initiate preferentially at these dark zones. The simulated results can well explain the observated ones.
关键词	copper single crystal cyclic deformation crack nucleation discrete dislocation dynamics internal stress distribution
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000227020500002
出版者	SCIENCE CHINA PRESS
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/84780
专题	中国科学院金属研究所
通讯作者	Yang, JH
作者单位	1.Shenyang Normal Univ, Coll Phys & Technol, Shenyang 110034, Peoples R China 2.Univ Sydney, CAMT, Sch Aerosp Mech & Mechatron Engn, Sydney, NSW 2006, Australia 3.Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yang, JH,Zhang, XP,Mai, YW,et al. Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage[J]. ACTA METALLURGICA SINICA,2005,41(1):9-14.
APA	Yang, JH,Zhang, XP,Mai, YW,&Li, Y.(2005).Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage.ACTA METALLURGICA SINICA,41(1),9-14.
MLA	Yang, JH,et al."Simulation of internal stresses near the surface and fatigue crack nucleation for a copper single crystal in cyclic deformation saturation stage".ACTA METALLURGICA SINICA 41.1(2005):9-14.