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<p>In the designing of graphene-reinforced titanium matrix composites (TMCs), heat treatments, such as solid solution and aging, serve as a critical step for microstructural regulation and mechanical properties enhancement. However, the effect of aging process on structural evolution and resultant tensile properties of the graphene-reinforced TMCs remains elusive. In this study, graphene-reinforced Ti-6Al-4V matrix composites were fabricated via spark plasma sintering strategy, followed by solid solution and aging treatments. The effect of aging time on the microstructure and tensile properties of the composites was systematically discussed. Results indicate that microstructure remains similar with increasing the aging time from 2 to 6&#xa0;h, but well-bonded interfaces are achieved at longer aging times, concomitant with the precipitation of fine secondary <i>α</i>-Ti phase in the matrix. These microstructural features collectively contribute to the great strength–ductility synergy in the graphene-reinforced TMCs. This study demonstrates a viable strategy for enhancing the mechanical properties of the graphene-reinforced TMCs composite through tailoring the aging process.</p>

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Optimization of tensile properties in graphene-reinforced titanium matrix composites through aging time control

  • 期刊论文

  • 发表日期：

    2026年3月23日

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  • Yu Yan,
  • Xudong Yuan,
  • Biao Li,
  • Haojie Liang,
  • Tingyi Yan,
  • Long Zhang

摘要

In the designing of graphene-reinforced titanium matrix composites (TMCs), heat treatments, such as solid solution and aging, serve as a critical step for microstructural regulation and mechanical properties enhancement. However, the effect of aging process on structural evolution and resultant tensile properties of the graphene-reinforced TMCs remains elusive. In this study, graphene-reinforced Ti-6Al-4V matrix composites were fabricated via spark plasma sintering strategy, followed by solid solution and aging treatments. The effect of aging time on the microstructure and tensile properties of the composites was systematically discussed. Results indicate that microstructure remains similar with increasing the aging time from 2 to 6 h, but well-bonded interfaces are achieved at longer aging times, concomitant with the precipitation of fine secondary α-Ti phase in the matrix. These microstructural features collectively contribute to the great strength–ductility synergy in the graphene-reinforced TMCs. This study demonstrates a viable strategy for enhancing the mechanical properties of the graphene-reinforced TMCs composite through tailoring the aging process.