J. Mater. Sci. Technol. ›› 2010, Vol. 26 ›› Issue (11): 1001-1005.

• Research Articles • 上一篇    下一篇

Numerical study on the effects of equi-biaxial residual stress on mechanical Properties of Nickel film by means of nanoindentation

令利增1,马增胜2,龙士国3,梁旭1   

  1. 1.
    2. 湘潭大学材料与光电物理学院
    3. 湘潭大学
  • 收稿日期:2008-11-07 修回日期:2009-11-17 出版日期:2010-11-30 发布日期:2010-11-22
  • 通讯作者: 龙士国
  • 基金资助:

    国家自然科学基金;国家自然科学基金磁场作用下高介电常数纳米有机表面膜的成膜机理研究;国家自然科学基金;国家自然科学基金;国家自然科学基金磁场作用下高介电常数纳米有机表面膜的成膜机理研究;国家自然科学基金;国家自然科学基金

Numerical Study on the Effects of Equi-biaxial Residual Stress on Mechanical Properties of Nickel Film by Means of Nanoindentation

Lizeng Ling, Shiguo Long, Zengsheng Ma, Xu Liang   

  1. Key Laboratory of Low Dimensional Materials and Application Technology of Ministry of Education, and Faculty of Materials, Optoelectronics and Physics, Xiangtan University, Xiangtan 411105, China
  • Received:2008-11-07 Revised:2009-11-17 Online:2010-11-30 Published:2010-11-22
  • Contact: Shigo Long
  • Supported by:

    the National Natural Science Foundation of China (NSFC, No. 10702057), Hunan Provincial Natural Science Foundation of China (No. 09JJ3003) and Hunan Provincial Innovation Foundation for Postgraduate (No. CX2009B130).

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摘要： In this paper, mechanical properties of Nickel film under residual stress have been systematically examined using the finite element method in nanoindentation. It was found that load-displacement curves shifted under elastic residual stress and plastic residual stress (i.e. residual stress exceeded the elastic limit stresses) for fixed indentation depth. Indentation profiles changed monotonously with compressive and tensile stresses at peak force which determinates contact area observed directly by FEM. The elastic residual stress has an effect slightly on the hardness but a remarkable effect in plastic residual stress in nickel film. The hardness increased when plastic residual stress increased under tensile and compressive stress applied to specimen. The relationship between residual stress and hardness was linear. It was found that residual stresses didn’t affect elastic modulus whether elastic residual stress or plastic stress was applied to specimen.

关键词: Residual stress, Hardness, Elastic Modulus, Indentation profile, Finite element method

Abstract: In this paper, mechanical properties of Nickel film under residual stress have been systematically examined by finite element method in nanoindentation. It was found that load-displacement curves shifted under elastic residual stress and residual stress exceeded the yield stress for fixed indentation depth. Indentation profiles changed monotonously with compressive and tensile stresses at peak force which determinates contact area observed directly by finite element modeling (FEM). The elastic residual stress has an effect slightly on the hardness but residual stress exceeded the yield stress shows a remarkable effect in nickel film. The hardness increased when residual stress exceeded the yield stress increased under tensile and compressive stress applied to specimen. The relationship between residual stress and hardness was linear. It was found that residual stresses didn0t affect elastic modulus whether elastic residual stress or plastic stress was applied to specimen.

Key words: Residual stress, Hardness, Elastic modulus, Indentation profile, Finite element
method