The normalized coffin- manson plot in terms of a new damage function based on grain boundary cavitation under creep- fatigue condition

  • Soo Woo Nam
  • Young Cheol Yoon
  • Baig Gyu Choi
  • Je Min Lee
  • Jin Wan Hong
Mechanical Behavior
Received:

Abstract

A new damage function based on a model for the creep-fatigue life prediction in terms of nucleation and growth of grain boundary cavities is proposed. This damage function is a combination of the terms related to the cavitational damage in the life prediction equation and is generally applicable to the materials in which failure is controlled by the grain boundary cavitational damage. The creep-fatigue data from the present and other investigations are used to check the validity of the proposed function, and it is shown that they satisfy the reliability of damage function. Additionally, using this damage function, one may realize that all the Coffin-Manson plots at the various levels of tensile hold time and temperature under strain-controlled creep-fatigue tests can be normalized to make the master curve.

Keywords

Material Transaction Hold Time Damage Function Korea Advance Institute Plastic Strain Range 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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Copyright information

© The Minerals, Metals & Material Society and ASM International 1996

Authors and Affiliations

  • Soo Woo Nam
    • 1
  • Young Cheol Yoon
    • 2
  • Baig Gyu Choi
    • 1
  • Je Min Lee
    • 3
  • Jin Wan Hong
    • 4
  1. 1.Department of Materials Science and EngineeringKorea Advanced Institute of Science and TechnologyTaejonKorea
  2. 2.SamSung Motors Inc.Kyungi-doKorea
  3. 3.Defence Quality Assurance AgencyKyungnamKorea
  4. 4.Samchunly Heat Treatment Co. Ltd.Kyungi-doKorea

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