Molecular dynamics simulation of nanoindentation properties of FeCrNiCoCu
Nanoindentation is one of the most widely used methods to investigate the characteristics of metallic materials.Thus,in this work,molecular dynamics simulation is employed to investigate the effects of the number of grains,the indenter radius and the indenter velocity on the indentation performance of the FeCrNiCoCu.The results show that when the number of grains increases from 4 to 16,the Young's modulus and hardness gradually decrease,showing an inverse Hall-Petch phenomenon.With the increase of the indenter radius,the Young's modulus increases,the hardness is greatly affected by the contact area,and the larger indenter radius is condu-cive to the generation and expansion of dislocation in the model.The effect of pressing speed on Young's modu-lus the hardness is weak.The higher the pressing speed,the lower the dislocation density and the slower the dis-location propagation.The purpose of this paper is to provide theoretical guidance for the study of FeCrNiCoCu.
国家科技期刊平台
NSTL
万方数据
维普
