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<p>In this study, an Al-15%Mg<sub>2</sub>Si-5%TiB<sub>2</sub> composite was prepared using A356-5wt.%TiB<sub>2</sub> alloy and pure Mg. The composite was then subjected to semi-solid isothermal heat treatment via a strain-induced melt activation (SIMA) process. The influence of holding temperature on the microstructure, mechanical properties, and tribological behavior of the composite was systematically investigated, and the results indicate that the optimal semi-solid microstructure was achieved when the composite was held at 625 °C for 1 hour. Compared to the sample treated at 610 °C, the composite exhibited significant improvements in hardness (20.02%), yield strength (2.87%), ultimate tensile strength (9.79%), elongation (66.99%), and wear resistance (26.25%).</p>

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Effects of Semi-Solid Isothermal Heat Treatment on the Tribological Behavior of Al-15%Mg2Si-5%TiB2 Composites

  • 期刊论文

  • 发表日期：

    2025年11月12日

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  • Bin Zhang,
  • Bo Jiang,
  • Ye Wang,
  • Hongyu Xu,
  • Maoliang Hu,
  • Yu Guo,
  • Zesheng Ji

摘要

In this study, an Al-15%Mg2Si-5%TiB2 composite was prepared using A356-5wt.%TiB2 alloy and pure Mg. The composite was then subjected to semi-solid isothermal heat treatment via a strain-induced melt activation (SIMA) process. The influence of holding temperature on the microstructure, mechanical properties, and tribological behavior of the composite was systematically investigated, and the results indicate that the optimal semi-solid microstructure was achieved when the composite was held at 625 °C for 1 hour. Compared to the sample treated at 610 °C, the composite exhibited significant improvements in hardness (20.02%), yield strength (2.87%), ultimate tensile strength (9.79%), elongation (66.99%), and wear resistance (26.25%).