AlSi10P/7075铝基复合材料的微观结构和阻尼性能研究

    Study on Microstructure and Damping Properties of AlSi10P/7075 Aluminum Matrix Composites

      摘要
    • 摘要: 采用搅拌摩擦加工技术制备AlSi10P/7075铝基复合材料，并对其微观组织、力学性能和阻尼行为进行研究。结果发现，AlSi10合金增强颗粒在复合材料基体中分布均匀，部分增强颗粒被破碎为细小颗粒；铝基复合材料中存在α-Al、Si和MgZn2物相，且没有发生界面反应；AlSi10P/7075铝基复合材料最大抗拉强度为391 MPa，比铝基体低14%，其断裂方式为韧性断裂；AlSi10P/7075铝基复合材料的阻尼性能优于7075铝基体的；在360℃时，AlSi10P/7075铝基复合材料的内耗值为0.131，比7075铝基体的高21%，AlSi10P/7075铝基复合材料的储能模量低于7075铝基体的。

       

      Abstract: AlSi10P/7075 aluminum matrix composite was prepared by friction stir machining technology, and its microstructure, mechanical properties and damping behavior were studied.The results show that the AlSi10 alloy reinforcement particles are evenly distributed in the matrix of the composite and some of the reinforcement particles are broken into fine particles.There are α-Al, Si and MgZn2 phases in aluminum matrix composite, and no interfacial reaction occurs.The maximum tensile strength of AlSi10P/7075 aluminum matrix composites is 391 MPa, 14%lower than that of the aluminum matrix, and its fracture mode is ductile fracture.The damping performance of AlSi10P/7075 aluminum matrix composite is better than that of 7075 aluminum matrix.At 360 ℃, the internal friction value of AlSi10P/7075 aluminum matrix composites is 0.131, 21% higher than that of 7075 aluminum matrix, and the energy storage modulus of AlSi10P/7075 aluminum matrix composites is lower than that of 7075 aluminum matrix.

       

      • HTML全文
      • 参考文献(13)
      • 相关文章
      • 施引文献
    • 资源附件(0)

    /

    返回文章
    返回
    邮件订阅 RSS