Loading rate sensitivity of nanoindentation creep in polycrystalline Ni films

被引:0
|
作者
Zengsheng Ma
Shiguo Long
Yong Pan
Yichun Zhou
机构
[1] Xiangtan University,Key Laboratory of Low Dimensional Materials & Application Technology of Ministry of Education, Faculty of Materials, Optoelectronics and Physics
来源
Journal of Materials Science | 2008年 / 43卷
关键词
Stress Exponent; Transient Creep; Indentation Creep; Double Logarithmic Plot; Carbon Steel Sheet;
D O I
暂无
中图分类号
学科分类号
摘要
Nanoindentation creep tests in Ni thin films with 3,000 nm thickness were performed with different loading times (5, 10, 20, 30, and 50 s) under the holding load 5,000 μN and holding time 30 s to investigate the dependence of the indentation creep behavior on the loading rate. The results show that significant indentation loading rate sensitivity on stress exponent and hardness was found, which shows that the stress exponent increases with indentation loading rate. In contrast, the elastic modulus decreases slightly (more or less 1%) due to a longer loading time. Based on the experimental results, we infer that the creep phenomena observed were probably induced by plasticity.
引用
收藏
页码:5952 / 5955
页数:3
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