TiC添加对A356铝合金组织与力学性能的影响研究

Research on Effects of TiC Addition on Microstructure and Mechanical Properties of A356 Aluminum Alloy

摘要: 采用搅拌熔铸法,制备了组织结构均匀的TiC/A356铝合金,研究了TiC含量对A356铝合金的物相组成、微观组织和力学性能的影响规律。结果表明,随着TiC含量的增加,TiC/A356铝合金的拉伸强度和伸长率呈先上升后降低的规律,维氏硬度则持续上升。当TiC含量为3wt%时,合金的综合性能最佳,其极限抗拉强度为197.1 Mpa、伸长率为9.10%、维氏硬度为84.7 HV。此外,还分析了TiC复合强化A356合金的作用机理模型。

Abstract: TiC/A356 aluminum alloy with uniform structure was prepared by stirring casting method. The effects of TiC content on the phase composition, microstructure and mechanical properties of A356 aluminum alloy were studied. The results show that with the increase of TiC content, the tensile strength and elongation of TiC/A356 aluminum alloy increase first and then decrease, while the Vickers hardness increases continuously. When the content of TiC is 3wt%, the alloy possesses the optimal comprehensive properties, with the ultimate tensile strength 197.1 MPa, the elongation 9.10%, and the Vickers hardness 84.7HV. Furthermore, the mechanism model of TiC compound reinforced A356 alloy was analyzed.