Investigation of grain boundary and orientation effects in polycrystalline metals by a dislocation-based crystal plasticity model
文献类型：期刊论文
| 作者 | Hu JQ(胡剑桥); Zhuang Z; Liu FX; Liu XM(刘小明) ; Liu ZL
|
| 刊名 | COMPUTATIONAL MATERIALS SCIENCE
 |
| 出版日期 | 2019-03-01 |
| 卷号 | 159页码:86-94 |
| 关键词 | Dislocation-based crystal plasticity Polycrystalline metal Grain size effect Grain orientation effect |
| ISSN号 | 0927-0256 |
| DOI | 10.1016/j.commatsci.2018.12.010 |
| 英文摘要 | 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. |
| 分类号 | 二类 |
| WOS关键词 | 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 |
| 语种 | 英语 |
| WOS记录号 | WOS:000457856900008 |
| 资助机构 | 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] |
| 其他责任者 | Liu, XM ; Liu, ZL |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/78479]  |
| 专题 | 力学研究所_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. |
| 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. |
入库方式： OAI收割
来源：力学研究所
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