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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
Source PublicationCOMPUTATIONAL MATERIALS SCIENCE
2019-03-01
Volume159Pages:86-94
ISSN0927-0256
AbstractPolycrystalline 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.
KeywordDislocation-based crystal plasticity Polycrystalline metal Grain size effect Grain orientation effect
DOI10.1016/j.commatsci.2018.12.010
Indexed BySCI ; EI
Language英语
WOS IDWOS:000457856900008
WOS KeywordHALL-PETCH RELATION ; NUMERICAL INVESTIGATIONS ; NANOCRYSTALLINE METALS ; SIZE DEPENDENCE ; RECENT PROGRESS ; YIELD STRENGTH ; DEFORMATION ; FCC ; DYNAMICS ; MICROPILLARS
WOS Research AreaMaterials Science, Multidisciplinary
WOS SubjectMaterials Science
Funding OrganizationScience 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]
Classification二类
Ranking1
Citation statistics
Document Type期刊论文
Identifierhttp://dspace.imech.ac.cn/handle/311007/78479
Collection非线性力学国家重点实验室
Affiliation1.{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
Recommended Citation
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.
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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