DISLOCATION DISTRIBUTION NEAR THE CRACK TIP OF I-MODE AND II-MODE IN BULK ALUMINUM SINGLE-CRYSTAL

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	DISLOCATION DISTRIBUTION NEAR THE CRACK TIP OF I-MODE AND II-MODE IN BULK ALUMINUM SINGLE-CRYSTAL
	Y. B. Xu; K. F. Ha; Z. G. Wang; X. H. Wang; J. Li
	1991
发表期刊	Journal of Applied Physics
ISSN	0021-8979
卷号	69 期号:1 页码:203-206
摘要	Dislocation distribution near the crack tip of I and II modes in bulk aluminum single crystal has been decorated by using the etching pit technique and then was observed by scanning electron microscopy. It has been shown that two kinds of distribution of dislocations, i.e., shielding and antishielding dislocations are found to exist near the crack tip. In addition to these, the dislocation-free zone is still observed to be between the crack tip and the plastic zone. According to Rice and Thomson [Philos. Mag. 29, 73 (1974)], the dislocation mode of the elastic-plastic crack is extended to include the antishielding dislocations as part of a crack-tip equilibrium configuration, which may be described as follows: (mu-b/2-pi) (S-a-e + S-s-c + S(c)s + S(e)a) [f(x')/(x - x')]dx' + sigma-a = 0, when /x/ < C, or sigma-f, when c < /x/ < s and e < /x/ < a. The factor affecting the dislocation distribution are discussed in detail.
部门归属	dept mat sci,changchun 130023,peoples r china.;xu, yb (reprint author), acad sinica,inst met res,fatigue & fracture mat lab,shenyang 110015,peoples r china
关键词	Electron-microscope Tem Observations Plastic Zone Bcc Metals Fracture Ductile
URL	查看原文
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/39482
专题	中国科学院金属研究所
推荐引用方式 GB/T 7714	Y. B. Xu,K. F. Ha,Z. G. Wang,et al. DISLOCATION DISTRIBUTION NEAR THE CRACK TIP OF I-MODE AND II-MODE IN BULK ALUMINUM SINGLE-CRYSTAL[J]. Journal of Applied Physics,1991,69(1):203-206.
APA	Y. B. Xu,K. F. Ha,Z. G. Wang,X. H. Wang,&J. Li.(1991).DISLOCATION DISTRIBUTION NEAR THE CRACK TIP OF I-MODE AND II-MODE IN BULK ALUMINUM SINGLE-CRYSTAL.Journal of Applied Physics,69(1),203-206.
MLA	Y. B. Xu,et al."DISLOCATION DISTRIBUTION NEAR THE CRACK TIP OF I-MODE AND II-MODE IN BULK ALUMINUM SINGLE-CRYSTAL".Journal of Applied Physics 69.1(1991):203-206.