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<p>A new low alloyed rare-earth-free Mg-0.7Cu-0.7Zn-0.5Ca-0.1Mn (wt.%) alloy is fabricated by low-temperature extrusion. It demonstrates a super-high yield strength of 501&#xa0;MPa and an acceptable elongation of 6.4%, attributing to the bimodal microstructure composed of ultrafine DRXed grains (0.65&#xa0;μm) and fine unDRXed grains (1.62&#xa0;μm), and nanosized MgZnCu precipitates.</p>

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Ultrahigh Strength over 500 MPa Achieved in a Rare-Earth-Free Dilute Mg-Cu-Based Alloy Fabricated by Low-Temperature Extrusion

  • 期刊论文

  • 发表日期：

    2025年11月25日

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  • Shuaiju Meng,
  • Keyi Chen,
  • Qian Fang,
  • Jinlong Song,
  • Jianjun Zhang

摘要

A new low alloyed rare-earth-free Mg-0.7Cu-0.7Zn-0.5Ca-0.1Mn (wt.%) alloy is fabricated by low-temperature extrusion. It demonstrates a super-high yield strength of 501 MPa and an acceptable elongation of 6.4%, attributing to the bimodal microstructure composed of ultrafine DRXed grains (0.65 μm) and fine unDRXed grains (1.62 μm), and nanosized MgZnCu precipitates.