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Enhanced Functional Fatigue Resistance of Cu-Al-Mn Superelastic wire bamboo-like grain structure
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  • Xiangbo Zu,
  • Huanyi Wen,
  • Zhenbo Peng,
  • Wei Li,
  • Fengcang Ma,
  • Meifeng He,
  • ZhiYi Ding,
  • Ke Zhang
Xiangbo Zu
University of Shanghai for Science and Technology
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Huanyi Wen
University of Shanghai for Science and Technology
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Zhenbo Peng
University of Shanghai for Science and Technology
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Wei Li
University of Shanghai for Science and Technology
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Fengcang Ma
University of Shanghai for Science and Technology
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Meifeng He
University of Shanghai for Science and Technology
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ZhiYi Ding
University of Shanghai for Science and Technology
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Ke Zhang
University of Shanghai for Science and Technology

Corresponding Author:[email protected]

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Abstract

The enhanced fatigue resistance of superelastic Cu-Al-Mn shape memory wires were investigated via bamboo-like grain structure obtained by cyclic heat treatment (CHT). It was demonstrated that increasing the number of CHT cycles can promote the grain growth to a straight grain boundary, eliminating the triangular structure that generally caused brittle fracture. In particular, the 5CHT and 7CHT specimens displayed negligible residual strain subsequent to unloading, following exposure to cumulative strains ranging from 2% to 10%, thereby showcasing superior superelasticity. From the functional fatigue test, the fatigue life of the shape memory wire subjected to 5 CHT cycles exceeds 4650 cycles at 5 % strain, which is more than 5 times that of traditional polycrystalline quenched samples.
25 Sep 2024Submitted to Fatigue & Fracture of Engineering Materials & Structures
29 Sep 2024Submission Checks Completed
29 Sep 2024Assigned to Editor
05 Oct 2024Reviewer(s) Assigned
19 Oct 2024Review(s) Completed, Editorial Evaluation Pending
22 Oct 2024Editorial Decision: Revise Minor
21 Nov 20241st Revision Received
21 Nov 2024Submission Checks Completed
21 Nov 2024Assigned to Editor