A crystal plasticity FE study of macro-and micro-subdivision in aluminium single crystals{001}<110>multi-pass rolled to a high reduction  

作　　者：Hui Wang Cheng Lu Kiet Tieu Yu Liu 

机构地区：[1]School of Mechanical,Materials and Mechatronic Engineering,University of Wollongong,New South Wales 2522,Australia [2]Research Center for Advanced Science and Technology,The University of Tokyo,Japan

出　　处：《Journal of Materials Science & Technology》2021年第17期231-246,共16页材料科学技术（英文版）

基　　金：Australian Research Council Discovery Project(DP170103092)。

摘　　要：In this study,the substructure formation in a multi-pass rolled aluminium single crystal{001}<110>was investigated by the crystal plasticity finite element model,and the predations were validated by experimental observations at both macro-and micro-scale.A finite element model for multi-pass rolling was developed to follow the real experimental rolling scheme,by which the through-thickness macroscopic subdivision was successfully predicted up to a 90%reduction.The macro-subdivision was featured by forming matrix bands through the thickness,and the deformation behaviours,in terms of slip activity,shear strain and crystal rotation,alternated between matrix bands.The development of matrix bands,stability of crystal orientations,and correlation between slip activity,shear strain and crystal rotation have been investigated.Another modelling method,Submodel,was used to exceedingly increase the mesh resolution in smaller regions of interest,and the experimentally observed microstructure,i.e.,micro-subdivision was explicitly and spatially revealed.Similar predictions were obtained in Submodels with different element sizes,which proves the feasibility of this method in predicting microstructure formation.It was found that the substructure formation by varying slip activity and crystal rotation between domains is energy favourable.The procedure of substructure formation was explained based on the predictions,three types of substructure have been identified,and the substructure formation was discussed.

关 键 词：Crystal plasticity FE Single crystal Multi-pass rolling Submodel SUBDIVISION SUBSTRUCTURE 

分 类 号：TG335[金属学及工艺—金属压力加工] TG146.21[一般工业技术—材料科学与工程]