Numerous studies have addressed the advantages of wire arc additive manufacturing for manufacturing aluminum alloys. However, the role of Ti content in aluminum alloys has rarely been discussed. Herein, the effect of Ti content on the microstructure and properties of Al–7Si–0.6Mg alloys was studied. The alloys were deposited via wire arc additive manufacturing and were examined through optical microscopy (OM), scanning electron microscopy (SEM), and electronic universal testing. The results show that the increase of Ti content gradually promotes the increase of the secondary dendrite arm spacing and also has an increasing tendency to form pores defect in the as-deposited alloys. The change of titanium content also affects the difference between horizontal and vertical direction properties of the alloy. The alloy with a Ti content of 0.112 wt% exhibits the best comprehensive properties. There is no difference in its horizontal and vertical direction properties. The tensile strengths, yield strengths, and elongation of this alloy (T6) along the vertical and horizontal axis are 356 and 355 MPa, 307 and 308 MPa, and 8.5% and 8.0%, respectively.

中文翻译：

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电弧增材沉积不同Ti含量Al-7Si-0.6Mg合金的组织与性能

许多研究已经解决了电弧增材制造在制造铝合金方面的优势。然而，很少讨论钛含量在铝合金中的作用。在此，研究了 Ti 含量对 Al-7Si-0.6Mg 合金组织和性能的影响。合金通过电弧增材制造沉积，并通过光学显微镜 (OM)、扫描电子显微镜 (SEM) 和电子万能测试进行检查。结果表明，Ti含量的增加逐渐促进了二次枝晶臂间距的增加，并且在沉积态合金中形成气孔缺陷的趋势也有增加的趋势。钛含量的变化也影响合金横向和纵向性能的差异。Ti含量为0的合金。112 wt%表现出最好的综合性能。它的水平和垂直方向属性没有区别。该合金（T6）沿纵轴和横轴的抗拉强度、屈服强度和伸长率分别为356和355 MPa、307和308 MPa，以及8.5%和8.0%。