Quantitative understanding of anomalous slip in Mo

IMR OpenIR

	Quantitative understanding of anomalous slip in Mo
	Yang, J. B.; Zhang, Z. J.; Zhang, Z. F.; jbyang@imr.ac.cn
	2015
发表期刊	PHILOSOPHICAL MAGAZINE
ISSN	1478-6435
卷号	95 期号:19 页码:2026-2045
摘要	Hexagonal dislocation networks (HDNs) formed by the reaction of < 111 >/2 screw dislocations are frequently observed in association with anomalous slip in body-centred cubic (bcc) metals. However, its role assigned in anomalous slip remains obscure due to the absence of quantitative description of its response to uniaxial loading. Here, systematic atomistic simulations are performed in molybdenum (Mo) to study the responses of a typical HDN to different applied loadings. The simulation results are used to develop a quantitative yield criterion for the HDN motion under uniaxial loading. Based on this criterion together with the yield equation that can account for the non-Schmid behaviours of an isolated < 111 >/2 screw dislocation, the transition from primary to anomalous slips with the loading direction is predicted to be consistent with the experimental observations in many bcc metals including Mo. This work also sheds light on other experimental results such as the lack of dead-band and the displacement accompanying anomalous slip. In addition, the reason for the absence of anomalous slip in bcc iron (Fe) is found by comparison of the reaction between < 111 >/2 screw dislocations in Mo and Fe.
部门归属	[yang, j. b. ; zhang, z. j. ; zhang, z. f.] chinese acad sci, shenyang natl lab mat sci, inst met res, shenyang 110016, peoples r china
关键词	Anomalous Slip Plastic Deformation Hexagonal Dislocation Network Molybdenum Body-centred Cubic
资助者	Program of "One Hundred Talented People" of the Chinese Academy of Sciences; National Natural Science Foundation of China (NSFC) [51331007]
收录类别	sci
语种	英语
WOS记录号	WOS:000356960700002
引用统计	被引频次：5[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/321006/75085
专题	中国科学院金属研究所
通讯作者	jbyang@imr.ac.cn
推荐引用方式 GB/T 7714	Yang, J. B.,Zhang, Z. J.,Zhang, Z. F.,et al. Quantitative understanding of anomalous slip in Mo[J]. PHILOSOPHICAL MAGAZINE,2015,95(19):2026-2045.
APA	Yang, J. B.,Zhang, Z. J.,Zhang, Z. F.,&jbyang@imr.ac.cn.(2015).Quantitative understanding of anomalous slip in Mo.PHILOSOPHICAL MAGAZINE,95(19),2026-2045.
MLA	Yang, J. B.,et al."Quantitative understanding of anomalous slip in Mo".PHILOSOPHICAL MAGAZINE 95.19(2015):2026-2045.