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Strain Hardening by High Density SISFs During Low Cycle Fatigue in Ni3(Al,Zr) Single Crystal

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Abstract

Stress response and its correlation with dislocation substructures in Ni3(Al,Zr) single crystal fatigued at room temperature have been studied. Cyclic strain hardening was found to be asymmetric and increased with increasing applied cyclic strain. Transmission Electron Microscope (TEM) observation showed that there are a profusion superlattic intrinsic stacking faults (SISFs) in fatigued Ni3(Al,Zr) single crystal samples. The cyclic strain hardening and stress asymmetry are explained by the movement of the SISF.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai, 200030, China

    Yuefeng Gu, Yi Liu & Dongliang Lin  (T.L. Lin)

  2. Institute of Metal Research, Academia Sinica, Shenyang, 110015, China

    Jianting Guo

Authors
  1. Yuefeng Gu
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  2. Yi Liu
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  3. Jianting Guo
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  4. Dongliang Lin  (T.L. Lin)
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Gu, Y., Liu, Y., Guo, J. et al. Strain Hardening by High Density SISFs During Low Cycle Fatigue in Ni3(Al,Zr) Single Crystal. MRS Online Proceedings Library 364, 303–307 (1994). https://doi.org/10.1557/PROC-364-303

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  • DOI: https://doi.org/10.1557/PROC-364-303

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