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<p>To solve the problem of contradiction between strength and damping of materials, four types of TC4/AZ91 interpenetrating phase composites (IPC) were fabricated by the combined process of additive manufacturing and squeeze casting. The influence of structure on the mechanical property and damping performance was studied. The stiffness, compressive strength, and damping capacity of IPC were significantly improved. The IPC with 2-mm hexagonal hole scaffold possessed superior damping capacity with the internal friction of 0.079, high compressive strength of 664&#xa0;MPa, and high elastic modulus of 56.9&#xa0;GPa, respectively. By adjusting IPC structure, different combinations of strength and damping were achieved. The damping of the IPC increased with increasing strain amplitude, decreased with increasing frequency, and increased with increasing temperature. The mechanism of high damping capacity of IPC at room temperature was dislocation damping and interface damping. When raising to a certain temperature, it was mainly progressed by grain boundary damping and interface damping. The IPC architecture played key role in strengthening materials and improving damping. This work provided architecture design strategy and feasible preparation method for development of high-performance materials.</p>

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Development of Interpenetrating Phase Structure TC4/AZ91 Composites with High Strength and Damping Capacity

  • 期刊论文

  • 发表日期：

    2025年2月20日

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  • Zhiqing Chen,
  • Yafei Liu,
  • Xiaoling Chen,
  • Xin Sun,
  • Jingya Wang,
  • Fulin Wang,
  • Tao Ying,
  • Mingjie Shen,
  • Lixiang Yang,
  • Liping Zhou,
  • Bin Chen,
  • Xiaoqin Zeng

摘要

To solve the problem of contradiction between strength and damping of materials, four types of TC4/AZ91 interpenetrating phase composites (IPC) were fabricated by the combined process of additive manufacturing and squeeze casting. The influence of structure on the mechanical property and damping performance was studied. The stiffness, compressive strength, and damping capacity of IPC were significantly improved. The IPC with 2-mm hexagonal hole scaffold possessed superior damping capacity with the internal friction of 0.079, high compressive strength of 664 MPa, and high elastic modulus of 56.9 GPa, respectively. By adjusting IPC structure, different combinations of strength and damping were achieved. The damping of the IPC increased with increasing strain amplitude, decreased with increasing frequency, and increased with increasing temperature. The mechanism of high damping capacity of IPC at room temperature was dislocation damping and interface damping. When raising to a certain temperature, it was mainly progressed by grain boundary damping and interface damping. The IPC architecture played key role in strengthening materials and improving damping. This work provided architecture design strategy and feasible preparation method for development of high-performance materials.