Configuration of yield zone for straight Volterra dislocation core

IMR OpenIR

	Configuration of yield zone for straight Volterra dislocation core
	Yu, ZW ; Xu, XL ; Liu, L
通讯作者	Yu, ZW()
	2002-03-18
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	38 期号:3 页码:235-238
摘要	According to the elastic stress field in the isotropic medium and Mises yield rule, the configuration of yield zone for the straight Volterra dislocation core was calculated. The results show that in infinite elastic medium, the size of yield zone for a straight dislocation is directivity proportional to its Burgers vector b and shear modulus mu, but inversely to the yield strength sigma(s). The configuration of yield zone for a straight screw Volterra dislocation core is circular and yield radius r(s) is 4.1b and that for a straight edge Volterra dislocation core is a dumbbell-like, the maximum half width of yield zone on the sliding plane is 5.9b and minimum half width is 1.4b. In half infinite elastic medium, the yield zone of straight screw dislocation core would shift toward the free surface due to the effect of image force. The configuration of yield zone is dependent on the distance, 1, between the screw dislocation line and free surface parallel to it. When l > 2r(s), the configuration of yield zone for a screw dislocation core is egg-shaped, l = 2r(s), dropping-water like, and l < 2r(s), the yield zone would extend on the free surface.
关键词	Volterra dislocation yield zone configuration
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:000174931400003
出版者	SCIENCE CHINA PRESS
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/114060
专题	中国科学院金属研究所
通讯作者	Yu, ZW
作者单位	1.Dalian Univ Technol, Inst Met Mat & Technol, Dalian 116024, Peoples R China 2.Chinese Acad Sci, State Key Lab Fatigue & Fracture Mat, Inst Met Res, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Yu, ZW,Xu, XL,Liu, L. Configuration of yield zone for straight Volterra dislocation core[J]. ACTA METALLURGICA SINICA,2002,38(3):235-238.
APA	Yu, ZW,Xu, XL,&Liu, L.(2002).Configuration of yield zone for straight Volterra dislocation core.ACTA METALLURGICA SINICA,38(3),235-238.
MLA	Yu, ZW,et al."Configuration of yield zone for straight Volterra dislocation core".ACTA METALLURGICA SINICA 38.3(2002):235-238.