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<p>The microstructure and mechanical properties of an Mg-4.8Y-2.8Gd-0.7Zr (wt.%) alloy were investigated in different conditions of processing, considering experimental results and thermodynamic calculations. At final processing condition, after homogenization heat treatment at 525&#xa0;°C for 12&#xa0;h, hot rolling at 500&#xa0;°C, and aging heat treatment at 200&#xa0;°C for 200&#xa0;h (the peak-aged condition), a considerable improvement in mechanical properties was verified, reaching TYS of 210&#xa0;MPa and UTS of 272&#xa0;MPa. The effective age-hardening response is mainly attributed to the presence of the metastable phase β'. The processing route proposed proved to be efficient in producing a high-performance magnesium alloy with lower cost and density when compared with other magnesium-based alloys containing rare-earth elements given in the literature.</p>

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Effect of Thermomechanical Processing and Aging on the Microstructure and Mechanical Properties of Mg-4.8Y-2.8Gd-0.7Zr (wt.%) Alloy

  • 期刊论文

  • 发表日期：

    2026年5月7日

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  • Viviane Lima Freitas da Silva,
  • Bruno Xavier de Freitas,
  • Paula Letícia Correa de Toledo Cury,
  • Rodolfo da Silva Teixeira,
  • Célia Regina Tomachuk,
  • Gilberto Carvalho Coelho,
  • Carlos Angelo Nunes

摘要

The microstructure and mechanical properties of an Mg-4.8Y-2.8Gd-0.7Zr (wt.%) alloy were investigated in different conditions of processing, considering experimental results and thermodynamic calculations. At final processing condition, after homogenization heat treatment at 525 °C for 12 h, hot rolling at 500 °C, and aging heat treatment at 200 °C for 200 h (the peak-aged condition), a considerable improvement in mechanical properties was verified, reaching TYS of 210 MPa and UTS of 272 MPa. The effective age-hardening response is mainly attributed to the presence of the metastable phase β'. The processing route proposed proved to be efficient in producing a high-performance magnesium alloy with lower cost and density when compared with other magnesium-based alloys containing rare-earth elements given in the literature.