Quasicontinuum study on the initial deformation behaviors of Al bi- crystal
MENG Guang- jian1，CHEN Zhong- jia1，YAO Qi1， TAO Ye1， LIU Zhi- feng2
1.School of Materials Science & Engineering, Hefei University of Technology, Hefei 230009，Anhui，China 2.School of Mechanical and Automotive Engineering, Hefei University of Technology, Hefei 230009，Anhui，China
Abstract：Multiscale simulations using the quasicontinuum (QC) method were performed to explain the process of nanoindentation on Al bi- crystal. The macroscopic load versus indentation depth curves, as well as microscopic representations, such as atomic location maps and plots of strain distribution were obtained, with different upper film thickness. The abrupt drops of load are caused by the nucleation of dislocations or the extension stacking faults, and strain concentration at grain boundary due to lattice distortion. When the upper layer film is thin, dislocation is more likely to emit at the grain boundary, which leads to a lower yield point.
蒙广建，陈忠家，姚 奇，陶 冶，刘志峰. 基于准连续方法探究双晶材料初始塑性变形行为[J]. , 2015, 22(4): 1-5.
MENG Guang- jian，CHEN Zhong- jia，YAO Qi， TAO Ye， LIU Zhi- feng. Quasicontinuum study on the initial deformation behaviors of Al bi- crystal. , 2015, 22(4): 1-5.
2015, Vol. 22 
