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<p>This study achieved a nanocrystalline α-CuZnAl/martensitic-CuZnAl (NC α-CuZnAl/M-CuZnAl) composite through surface shot peening. Implementing a strain-matching strategy, the tensile elastic strain of the NC α-CuZnAl phase reached 3.8% - the highest value reported in nanocrystalline metals to date. Integration with shape memory alloys (SMAs) presents an effective approach for enhancing the strength and elastic strain limit of nanocrystalline metals. The SMA phase acts as a strain-distributing medium that homogenizes lattice strain within the NC metal, enabling collective atomic loading. This work demonstrates that high-strength NC metal composites can be engineered through strain-matching strategy design.</p>

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Large Elastic Strain of Nanocrystalline Metal Based on a Strain-Matching Strategy

  • 期刊论文

  • 发表日期：

    2025年12月29日

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  • Feng Yang,
  • Shaokai Tong,
  • Yanfang Yue,
  • Tenglong Li,
  • Jiayi Li,
  • Lishan Cui

摘要

This study achieved a nanocrystalline α-CuZnAl/martensitic-CuZnAl (NC α-CuZnAl/M-CuZnAl) composite through surface shot peening. Implementing a strain-matching strategy, the tensile elastic strain of the NC α-CuZnAl phase reached 3.8% - the highest value reported in nanocrystalline metals to date. Integration with shape memory alloys (SMAs) presents an effective approach for enhancing the strength and elastic strain limit of nanocrystalline metals. The SMA phase acts as a strain-distributing medium that homogenizes lattice strain within the NC metal, enabling collective atomic loading. This work demonstrates that high-strength NC metal composites can be engineered through strain-matching strategy design.