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<p>The yield strength of face-centered cubic (FCC) alloys is often insufficient for applications. In the present work, hot rolling was employed to prestore dislocations and stacking faults (SFs) in a nonequiatomic CoCrNi alloy with very low stacking fault energy (SFE). The resulting specimen exhibits an enhanced strength–ductility synergy, attaining a high yield strength of 887&#xa0;MPa with a uniform elongation of 28%. The role of prestoring dislocations and SFs in governing the yield strength and subsequent deformation mechanisms was systematically investigated. This work demonstrates a feasible strategy of prestoring defects to optimize the mechanical properties of CoCrNi alloys.</p>

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Enhanced strength–ductility synergy by prestoring dislocations and stacking faults in a nonequiatomic CoCrNi alloy

  • 期刊论文

  • 发表日期：

    2026年7月22日

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  • Z. Y. Ni,
  • S. Y. Peng,
  • Y. Z. Tian

摘要

The yield strength of face-centered cubic (FCC) alloys is often insufficient for applications. In the present work, hot rolling was employed to prestore dislocations and stacking faults (SFs) in a nonequiatomic CoCrNi alloy with very low stacking fault energy (SFE). The resulting specimen exhibits an enhanced strength–ductility synergy, attaining a high yield strength of 887 MPa with a uniform elongation of 28%. The role of prestoring dislocations and SFs in governing the yield strength and subsequent deformation mechanisms was systematically investigated. This work demonstrates a feasible strategy of prestoring defects to optimize the mechanical properties of CoCrNi alloys.