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<p>Particle-reinforced magnesium matrix composites (PRMMCs) demonstrate limited high-temperature deformability, presenting significant challenges for hot working. To address this limitation, this study aims to identify an optimal hot processing window for PRMMCs. TiC particle-reinforced AZ61 magnesium alloy composites were fabricated via spark plasma sintering (SPS). Subsequent hot compression simulations enabled the development of a strain-modified hyperbolic sine constitutive model for the PRMMCs, which incorporates peak stress and flow stresses at different strain levels during hot deformation. A strong correlation (<i>R</i> = 0.99134) was observed between experimental flow stress data and strain-corrected predictions generated by the model. Analysis of the hot processing maps revealed that instability domains emerge and expand with increasing strain. Within the experimentally investigated deformation parameters, the optimal hot processing window was determined to be within temperature range of 375-450&#xa0;°C and a strain rate range of 0.001-0.0032&#xa0;s<sup>−1</sup>, where the maximum power dissipation efficiency for PRMMCs concurrently occurred.</p>

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Study on the Hot Deformation Behavior of Particle-Reinforced Magnesium Matrix Composites

  • 期刊论文

  • 发表日期：

    2026年4月22日

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  • Jiayou Xie,
  • Yan Fei,
  • Yue Wu,
  • Xinyu Zhang

摘要

Particle-reinforced magnesium matrix composites (PRMMCs) demonstrate limited high-temperature deformability, presenting significant challenges for hot working. To address this limitation, this study aims to identify an optimal hot processing window for PRMMCs. TiC particle-reinforced AZ61 magnesium alloy composites were fabricated via spark plasma sintering (SPS). Subsequent hot compression simulations enabled the development of a strain-modified hyperbolic sine constitutive model for the PRMMCs, which incorporates peak stress and flow stresses at different strain levels during hot deformation. A strong correlation (R = 0.99134) was observed between experimental flow stress data and strain-corrected predictions generated by the model. Analysis of the hot processing maps revealed that instability domains emerge and expand with increasing strain. Within the experimentally investigated deformation parameters, the optimal hot processing window was determined to be within temperature range of 375-450 °C and a strain rate range of 0.001-0.0032 s−1, where the maximum power dissipation efficiency for PRMMCs concurrently occurred.