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<p>In this study, the Mg-5Al-1Zn-3La-1Gd alloy with grain size of 5.18&#xa0;μm was fabricated using a dual deformation approach involving extrusion followed by rolling (E + R). The slip modes, dislocation characteristics, and mechanical properties were investigated. The results demonstrate that the activation of &lt; c + a &gt; slip is successfully achieved alongside the weakening of basal texture, both of which are linked to grain boundary segregation. Following E + R processing, the yield strength (YS) and ultimate tensile strength (UTS) increase by approximately 170 and 57&#xa0;MPa, respectively. The overall strengthening arises from a combination of grain refinement, dislocation strengthening, and precipitation strengthening. Moreover, the presence of numerous short &lt; c + a &gt; dislocations in the E + R alloy enhances deformation capability.</p>

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Hybrid Strengthening Effect Induced by Dual Deformation in Weakened-Texture Mg Alloy

  • 期刊论文

  • 发表日期：

    2025年9月3日

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  • Feng Long,
  • Xiao Liu,
  • Chunfang Zhao,
  • Yan Tang,
  • Weitao Jia

摘要

In this study, the Mg-5Al-1Zn-3La-1Gd alloy with grain size of 5.18 μm was fabricated using a dual deformation approach involving extrusion followed by rolling (E + R). The slip modes, dislocation characteristics, and mechanical properties were investigated. The results demonstrate that the activation of < c + a > slip is successfully achieved alongside the weakening of basal texture, both of which are linked to grain boundary segregation. Following E + R processing, the yield strength (YS) and ultimate tensile strength (UTS) increase by approximately 170 and 57 MPa, respectively. The overall strengthening arises from a combination of grain refinement, dislocation strengthening, and precipitation strengthening. Moreover, the presence of numerous short < c + a > dislocations in the E + R alloy enhances deformation capability.