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<p>Mitigating the adverse impacts of iron (Fe) is pivotal to broadening the application scope of A380 aluminum alloys within the die casting industry. In this study, TiB<sub>2</sub>/A380 composites with high Fe content were prepared as TiB<sub>2</sub> particle-reinforced composites to improve the mechanical properties of A380 aluminum alloy containing 1.0&#xa0;wt% and 1.5&#xa0;wt% Fe. The effect of TiB<sub>2</sub> content on the microstructure and properties of TiB<sub>2</sub>/high-Fe-content A380 composites was investigated. The results revealed that with increasing TiB<sub>2</sub> content, the average grain size decreased while the second phase in the matrix was progressively refined. However, the agglomeration of TiB<sub>2</sub> particles became more pronounced. The β-Fe phase was fragmented, while the α-Fe phase emerged and increased upon reaching a certain threshold of TiB<sub>2</sub> content. When the TiB<sub>2</sub> content reached 2.5&#xa0;vol%, the overall performance of the composites with Fe contents of 1.0&#xa0;wt% and 1.5&#xa0;wt% was optimal, achieving peak tensile strengths of 136.6&#xa0;MPa and 114.9&#xa0;MPa, respectively. The hardness values for these composites were 77.7HV and 102.1HV, respectively. Nevertheless, the addition of TiB<sub>2</sub> had a limited effect on the plastic properties of A380 composites with high Fe content.</p>

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Effect of TiB2 Content on Microstructure and Properties of TiB2/High-Fe-Content A380 Composites

  • 期刊论文

  • 发表日期：

    2025年8月13日

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  • Ripeng Jiang,
  • Renjun Hu,
  • Jingzhu Liu,
  • Ruiqing Li,
  • Chenyuan Zhang

摘要

Mitigating the adverse impacts of iron (Fe) is pivotal to broadening the application scope of A380 aluminum alloys within the die casting industry. In this study, TiB2/A380 composites with high Fe content were prepared as TiB2 particle-reinforced composites to improve the mechanical properties of A380 aluminum alloy containing 1.0 wt% and 1.5 wt% Fe. The effect of TiB2 content on the microstructure and properties of TiB2/high-Fe-content A380 composites was investigated. The results revealed that with increasing TiB2 content, the average grain size decreased while the second phase in the matrix was progressively refined. However, the agglomeration of TiB2 particles became more pronounced. The β-Fe phase was fragmented, while the α-Fe phase emerged and increased upon reaching a certain threshold of TiB2 content. When the TiB2 content reached 2.5 vol%, the overall performance of the composites with Fe contents of 1.0 wt% and 1.5 wt% was optimal, achieving peak tensile strengths of 136.6 MPa and 114.9 MPa, respectively. The hardness values for these composites were 77.7HV and 102.1HV, respectively. Nevertheless, the addition of TiB2 had a limited effect on the plastic properties of A380 composites with high Fe content.