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Strengthening effect of nanoprecipitates on twinned copper: a discrete dislocation dynamics simulation study

文献类型：期刊论文

作者Yu,Junshi3; Wei DA(魏德安)2; Zhao,Ke3; Yuan FP(袁福平)1,2; Kang,Guozheng3; Zhang,Xu3
刊名MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING
出版日期2025-01-31
卷号33期号:1页码:20
关键词discrete dislocation dynamics simulation twinned copper nanoprecipitate plasticity mechanism orientation effect
ISSN号0965-0393
DOI10.1088/1361-651X/ad9494
通讯作者Zhang, Xu(xzhang@swjtu.edu.cn)
英文摘要Introducing twin boundaries (TBs) and nanoprecipitates has emerged as a highly effective approach for enhancing the mechanical properties of metallic materials. In this paper, the dislocation-precipitate and dislocation-TB interaction models were incorporated into the three-dimensional discrete dislocation dynamics (DDD) framework. The effect of nanoprecipitates on the mechanical properties of single crystal and twinned copper under various loading direction angles was investigated. For single crystal copper containing precipitates, the synergistic strengthening effects of forest dislocations and precipitates were explored by theoretical models. For twinned copper, the TB strengthening effect is derived from DDD simulation results and theoretical models. Analyses revealed that when the loading direction angle is 0 degrees and 90 degrees, the introduction of precipitates has almost no impact on the TB strengthening effect. When the loading direction angle is 90 degrees, the trans-twin dislocations spanning across two lamellae were identified, and the nanoprecipitates hindered the slip of the trans-twin dislocations. When the loading direction angle is 75 degrees, the nanoprecipitates suppressed the strength softening caused by twinning deformation. Furthermore, the accumulation of twinning dislocations on TBs, facilitated by nanoprecipitates, increased the difficulty for dislocations to interact with TB. This study shows the potential of employing DDD for investigating plasticity mechanisms in materials with diverse microstructures, paving the way for future designs of metallic materials through DDD simulations.
分类号Q3
WOS关键词HIGH ELECTRICAL-CONDUCTIVITY ; DEFORMATION MECHANISMS ; BOUNDARY INTERACTION ; SCREW DISLOCATIONS ; GRAIN-SIZE ; CU ; ORIENTATION ; MAGNESIUM ; BEHAVIOR ; AL
资助项目State Key Laboratory of Nonlinear Mechanics[12222209] ; State Key Laboratory of Nonlinear Mechanics[52192591] ; State Key Laboratory of Nonlinear Mechanics[12192214] ; National Natural Science Foundation of China ; Opening Fund of State Key Laboratory of Nonlinear Mechanics
WOS研究方向Materials Science ; Physics
语种英语
WOS记录号WOS:001367175100001
资助机构State Key Laboratory of Nonlinear Mechanics ; National Natural Science Foundation of China ; Opening Fund of State Key Laboratory of Nonlinear Mechanics
其他责任者Zhang, Xu
源URL[http://dspace.imech.ac.cn/handle/311007/97606]  
专题力学研究所_非线性力学国家重点实验室
作者单位1.Univ Chinese Acad Sci, Sch Engn Sci, Beijing 100049, Peoples R China
2.Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China;
3.Southwest Jiaotong Univ, Sch Mech & Aerosp Engn, Appl Mech & Struct Safety Key Lab Sichuan Prov, Chengdu 610031, Peoples R China;
推荐引用方式
GB/T 7714		 Yu,Junshi,Wei DA,Zhao,Ke,et al. Strengthening effect of nanoprecipitates on twinned copper: a discrete dislocation dynamics simulation study[J]. MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,2025,33(1):20.
APA Yu,Junshi,魏德安,Zhao,Ke,袁福平,Kang,Guozheng,&Zhang,Xu.(2025).Strengthening effect of nanoprecipitates on twinned copper: a discrete dislocation dynamics simulation study.MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING,33(1),20.
MLA Yu,Junshi,et al."Strengthening effect of nanoprecipitates on twinned copper: a discrete dislocation dynamics simulation study".MODELLING AND SIMULATION IN MATERIALS SCIENCE AND ENGINEERING 33.1(2025):20.

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来源：力学研究所

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