摘要
针对纳米压入仪上普遍使用Berkovich三棱锥压头、本文分别考虑理想与钝化两种压头尖端几何情况、并使用三维弹塑性大应变有限元分析软件ABAQUS、对沉积在陶瓷基体上金俱薄膜的纳米压入加载过程进行模拟计算,建立了膜、基材料基本力学性能参量及压头相对钝化最同纳米压入加载曲线间的函数关系,进而提出了利用纳米压入仪测得的连续压入加载曲线确定陶瓷基体上金属薄膜屈服强度和硬化指数的一般方法.
Simulations of load–displacement relations for the nanoindentation of thin metal films on ceramic substrates by both ideal and blunt Berkovich indenters were performed using the large strain elastoplastic feature of the ABAQUS finite element code.The functional equations have been developed to predict the relations among the mechanical properties of film and substrate,the relative blunting ratio of the indenter,and the nanoindentation loading curve.A new method for obtaining the yield strength and hardening index of metal film from nanoindentation loading curve is then proposed.
作者
马德军
徐可为
何家文
MA Dejun;XU Kewei;HE Jiawen(State Key Laboratory for Mechanical Behavior of Materials,Xi'an Jiaotong University,Xi'an 710049)
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1999年第10期1043-1048,共6页
Acta Metallurgica Sinica
基金
国家自然科学基金59571031和59731020资助项目
中法PRA合作研究项目
