Aluminum alloys are becoming widely preferred in the automotive industry due to their high specific strength-to-weight ratios. Among these aluminum cast alloys, those with high-silicon content can offer a unique combination of mechanical and better wear properties. In this study, EN AC 46000 (AlSi₉Cu₃(Fe)), 48000 (AlSi₁₂CuNiMg), and 48100 (AlSi₁₇Cu₄Mg) aluminum alloys are produced using high-pressure die casting and gas-induced semi-solid (GISS)-adapted technologies. The effects of GISS adaption on the microstructure and tribological behavior are investigated. The lower casting temperatures and formation of solid particles in the melt by GISS adaption were found to improve the die filling and reduced porosity. This leads to higher hardness and improved wear resistance. Among the six casts investigated, the one with GISS-adapted 48100 (AlSi₁₇Cu₄Mg) alloy showed the highest hardness and highest abrasion of the cast iron pin during tribological tests. The enhanced properties are assumed to be the result of its unique microstructure formed due to its high-silicon and copper contents, as well as the decreased microporosity due to the GISS (gas-induced semi-solid) adaption approach.

Graphic abstract

中文翻译：

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研究通过一种新方法生产的铝合金的摩擦学行为：气体诱导半固态（GISS）铸造技术

铝合金由于其高的比强度/重量比而在汽车工业中变得越来越受欢迎。在这些铝铸合金中，硅含量高的合金可以提供机械性能和更好的耐磨性的独特组合。在本研究中，EN AC 46000（AlSi ₉ Cu ₃（Fe）），48000（AlSi ₁₂ CuNiMg）和48100（AlSi ₁₇ Cu ₄Mg）铝合金是使用高压压铸和气致半固态（GISS）技术制造的。研究了GISS适应对微观结构和摩擦学行为的影响。发现较低的铸造温度和通过GISS适应在熔体中形成固体颗粒可改善模头填充并降低孔隙率。这导致更高的硬度和改善的耐磨性。在所研究的六种铸件中，一种具有符合GISS的铸件48100（AlSi ₁₇ Cu ₄在摩擦学测试中，Mg）合金显示出铸铁销的最高硬度和最高磨损。增强的性能被认为是由于其高硅和铜含量形成了独特的微观结构的结果，以及由于GISS（气体诱导的半固态）适应方法而降低了微孔率的结果。

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