一种用于确定经受纳米压痕的铝的力学性能的实验与数值相结合的方法。

A combined experimental-numerical approach for determining mechanical properties of aluminum subjects to nanoindentation.

作者信息

Liu Mao, Lu Cheng, Tieu Kiet Anh, Peng Ching-Tun, Kong Charlie

机构信息

School of Mechanical, Materials and Mechatronic Engineering, University of Wollongong, Wollongong, NSW 2522, Australia.

Electron Microscope Unit, The University of New South Wales, Sydney, NSW 2052, Australia.

出版信息

Sci Rep. 2015 Oct 14;5:15072. doi: 10.1038/srep15072.

DOI:10.1038/srep15072

PMID:26464128

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC4604481/

Abstract

A crystal plasticity finite element method (CPFEM) model has been developed to investigate the mechanical properties and micro-texture evolution of single-crystal aluminum induced by a sharp Berkovich indenter. The load-displacement curves, pile-up patterns and lattice rotation angles from simulation are consistent with the experimental results. The pile-up phenomenon and lattice rotation have been discussed based on the theory of crystal plasticity. In addition, a polycrystal tensile CPFEM model has been established to explore the relationship between indentation hardness and yield stress. The elastic constraint factor C is slightly larger than conventional value 3 due to the strain hardening.

摘要

已开发出一种晶体塑性有限元方法（CPFEM）模型，用于研究尖锐的贝氏压头对单晶铝力学性能和微观织构演变的影响。模拟得到的载荷-位移曲线、堆积模式和晶格旋转角度与实验结果一致。基于晶体塑性理论对堆积现象和晶格旋转进行了讨论。此外，还建立了一个多晶拉伸CPFEM模型，以探讨压痕硬度与屈服应力之间的关系。由于应变硬化，弹性约束因子C略大于传统值3。