Abstract The development of multicomponent Al-Bi alloys is an alternative approach to control either separation or morphology of the phases forming their microstructures. Furthermore, addition of alloying elements in Al-Bi alloys has been settled to pursue an optimized combination of wear resistance and mechanical strength. In the present investigation, solidification conditions are deduced from temperature measurements and the microstructure is thoroughly characterized. The results highlight the impact of the solidification conditions on the Bi distribution and macrosegregation. A relation is established between Bi-droplet spacing and wear resistance and a comparison with previous experiments on Al-Bi-Cu alloys is outlined. It is found that both Bi segregation and spacing between globules of Bi control the wear resistance of the Zn-containing alloy. Despite the similarities of Bi spacings if Cu- and Zn-containing alloys are compared, the wear resistance of the Cu-containing alloy is higher.

中文翻译：

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偏晶Al-Bi-Zn合金的显微组织和耐磨性表征

摘要 多组分 Al-Bi 合金的开发是控制形成其微观结构的相的分离或形态的另一种方法。此外，已解决在 Al-Bi 合金中添加合金元素以追求耐磨性和机械强度的优化组合。在目前的研究中，凝固条件是从温度测量中推导出来的，并且对微观结构进行了彻底的表征。结果突出了凝固条件对 Bi 分布和宏观偏析的影响。建立了 Bi 液滴间距和耐磨性之间的关系，并概述了与之前对 Al-Bi-Cu 合金进行的实验的比较。发现Bi偏析和Bi小球之间的间距控制了含Zn合金的耐磨性。尽管比较含铜和含锌合金时 Bi 间距相似，但含铜合金的耐磨性更高。