J. Mater. Sci. Technol. ›› 2011, Vol. 27 ›› Issue (5): 453-459.

• Reviews • 上一篇    下一篇

Uniaxial Ratchetting Behaviours of Metals with Different Crystal Structures or Values of Fault Energy: Macroscopic Experiments

康国政1,刘宇杰2,高庆3,董亚伟2   

  1. 1. 西南交通大学
    2. 西南交通大学力学与工程学院
    3.
  • 收稿日期:2009-10-16 修回日期:2010-01-09 出版日期:2011-05-28 发布日期:2011-05-28
  • 通讯作者: 康国政
  • 基金资助:

    国家自然科学基金资助项目

Uniaxial Ratcheting Behaviors of Metals with Diffent Crystal Structures or Values of Fault Energy: Macroscopic Experiments

Guozheng Kang1), Yujie Liu2), Yawei Dong2),Qing Gao2)   

  1. 1) State Key Laboratory of Traction Power, Southwest Jiaotong University, Chengdu 610031, China
    2) School of Mechanics and Engineering, Southwest Jiaotong University, Chengdu 610031, China
  • Received:2009-10-16 Revised:2010-01-09 Online:2011-05-28 Published:2011-05-28
  • Contact: Guozheng Kang
  • Supported by:

    the National Natural Science Foundation of China (Grant No. 10772153)

RichHTML

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摘要： The uniaxial ratchetting behaviours of several metals with different crystal structures or values of fault energy were observed by the stress-controlled cyclic tests at room temperature. The prescribed metals included 316L stainless steel, pure copper, pure aluminium, and ordinary 20 carbon steel. The effects of applied mean stress, stress amplitude and stress ratio on the uniaxial ratchetting were also investigated. The observations show that different crystal structures or values of fault energy result in more or less different ratchetting behaviours for the prescribed metals. The different ratchetting behaviours are partially caused by the variation of dislocation mobility.

Abstract: The uniaxial ratcheting behaviors of several metals with different crystal structures or values of fault energy were observed by the stress-controlled cyclic tests at room temperature. The prescribed metals included 316L stainless steel, pure copper, pure aluminum, and ordinary 20# carbon steel. The effects of applied mean stress, stress amplitude and stress ratio on the uniaxial ratcheting were also investigated. The observations show that different crystal structures or values of fault energy result in more or less different ratcheting behaviors for the prescribed metals. The different ratcheting behaviors are partially caused by the variation of dislocation mobility.

Key words: Ratcheting, Uniaxial cyclic loading, Crystal structure, Fault energy