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<p>This study investigates a Ti<sub>45</sub>Zr<sub>5</sub>Pt<sub>19</sub>Pd<sub>25</sub>Co<sub>6</sub> high-temperature shape memory alloy designed for functional stability through high-entropy strengthening and temperature-enabled dislocation recovery. Cyclic testing confirms better stability when the service temperature was extended to 500&#xa0;°C compared to 400&#xa0;°C. While 400&#xa0;°C operation induces instability from dislocations, 500&#xa0;°C promotes dislocation recovery, as evidenced by cyclic superelastic and microhardness tests. This demonstrates that strategic temperature selection can enhance the longevity of high-temperature high-entropy shape memory alloys.</p>

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High-Entropy Ti45Zr5Pt19Pd25Co6 High-Temperature Shape Memory Alloy with Improved Functional Stability Through In-Service Dislocation Recovery

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2026年4月21日

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  • Yi-Ting Hsu,
  • Yu-Nien Shen,
  • Chih-Hsuan Chen,
  • Y. Yamabe-Mitarai

摘要

This study investigates a Ti45Zr5Pt19Pd25Co6 high-temperature shape memory alloy designed for functional stability through high-entropy strengthening and temperature-enabled dislocation recovery. Cyclic testing confirms better stability when the service temperature was extended to 500 °C compared to 400 °C. While 400 °C operation induces instability from dislocations, 500 °C promotes dislocation recovery, as evidenced by cyclic superelastic and microhardness tests. This demonstrates that strategic temperature selection can enhance the longevity of high-temperature high-entropy shape memory alloys.