Investigation of grain boundary and orientation effects in polycrystalline metals by a dislocation-based crystal plasticity model

doi:10.1016/j.commatsci.2018.12.010

IMECH-IR > 非线性力学国家重点实验室

	Investigation of grain boundary and orientation effects in polycrystalline metals by a dislocation-based crystal plasticity model
	Hu JQ(胡剑桥); Zhuang Z ; Liu FX ; Liu XM(刘小明); Liu ZL
发表期刊	COMPUTATIONAL MATERIALS SCIENCE
	2019-03-01
卷号	159 页码:86-94
ISSN	0927-0256
摘要	Polycrystalline metal with well-designed grain structure exhibits different strength and ductility compared with the conventional macro scale materials. In the present study, the mechanisms of strain hardening and inhomogeneous deformation in polycrystals are analyzed by considering the interaction between dislocations and grain boundaries. Firstly, a dislocation density based crystal plasticity model is developed and then used to quantitatively study the grain size and orientation effects in polycrystals. With the decrease of grain size, the accumulation and interaction of dislocations are promoted in the grain, resulting in back-stress hardening. Simultaneously, two opposite effects of the inhomogeneity in grain orientation are obtained by evaluating the local Schmidt factors in each grain and their standard deviation. The findings highlight the effect of grain boundary on the strength and provide quantitative insight into the effect of grain orientation on ductility.
关键词	Dislocation-based crystal plasticity Polycrystalline metal Grain size effect Grain orientation effect
DOI	10.1016/j.commatsci.2018.12.010
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:000457856900008
关键词[WOS]	HALL-PETCH RELATION ; NUMERICAL INVESTIGATIONS ; NANOCRYSTALLINE METALS ; SIZE DEPENDENCE ; RECENT PROGRESS ; YIELD STRENGTH ; DEFORMATION ; FCC ; DYNAMICS ; MICROPILLARS
WOS研究方向	Materials Science, Multidisciplinary
WOS类目	Materials Science
项目资助者	Science Challenge Project [TZ2018001] ; National Natural Science Foundation of China [11772334, 11432014, 11672301] ; Youth Innovation Promotion Association CAS [2018022] ; Strategic Priority Research Program of the Chinese Academy of Sciences [XDB22040501]
论文分区	二类
力学所作者排名	1
RpAuthor	Liu, XM ; Liu, ZL
引用统计	被引频次：18[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/78479
专题	非线性力学国家重点实验室
作者单位	1.{Hu, Jianqiao、Liu, Xiaoming} Chinese Acad Sci, State Key Lab Nonlinear Mech, Inst Mech, Beijing 100190, Peoples R China 2.{Zhuang, Zhuo、Liu, Fengxian、Liu, Zhanli} Tsinghua Univ, Appl Mech Lab, Sch Aerosp Engn, Beijing 100084, Peoples R China
推荐引用方式 GB/T 7714	Hu JQ,Zhuang Z,Liu FX,et al. Investigation of grain boundary and orientation effects in polycrystalline metals by a dislocation-based crystal plasticity model[J]. COMPUTATIONAL MATERIALS SCIENCE,2019,159:86-94.Rp_Au:Liu, XM, Liu, ZL
APA	胡剑桥,Zhuang Z,Liu FX,刘小明,&Liu ZL.(2019).Investigation of grain boundary and orientation effects in polycrystalline metals by a dislocation-based crystal plasticity model.COMPUTATIONAL MATERIALS SCIENCE,159,86-94.
MLA	胡剑桥,et al."Investigation of grain boundary and orientation effects in polycrystalline metals by a dislocation-based crystal plasticity model".COMPUTATIONAL MATERIALS SCIENCE 159(2019):86-94.

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