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Investigation on the grain boundary strengthening effect of a nickel-based superalloy
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  • DongFang Shi,
  • Zhenjun Zhang,
  • Jinhai Hu,
  • Zhefeng Zhang
DongFang Shi
Institute of Metal Research Chinese Academy of Sciences
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Zhenjun Zhang
Institute of Metal Research, Chinese Academy of Sciences
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Jinhai Hu
Northeastern University
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Zhefeng Zhang
Institute of Metal Research, Chinese Academy of Sciences
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Abstract

The grain boundary strengthening effect (GBSE) was investigated for nickel-based superalloy bicrystals with various misorientations under different temperatures and loading directions. The results show that the GBSE is enhanced with the increase of misorientation and insensitive to the temperature. Besides, the loading direction relative to GB also has strong effect on GBSE. On the other hand, the GBSE is often accompanied by GB cracking. The trend of GB cracking is heightened with the increase of misorientation and temperature. However, the trend of GB cracking is reduced strongly when the loading direction transforms from parallel direction to vertical direction.

Peer review status:UNDER REVIEW

26 Aug 2020Submitted to Fatigue & Fracture of Engineering Materials & Structures
26 Aug 2020Assigned to Editor
26 Aug 2020Submission Checks Completed
29 Aug 2020Reviewer(s) Assigned