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FORMATION OF IRON-RICH INTERMETALLIC PHASES DURING SOLIDIFICATION OF ALUMINIUM CASTING ALLOYS

机译：铝铸造合金凝固过程中富铁中间相的形成

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摘要

Iron is the most common and detrimental impurity in aluminium casting alloys and has long been associated with impaired properties and often an increase in casting defects. While the negative effects of iron are clear, the mechanism involved is not fully understood. It has generally been associated with the formation of iron-rich intermetallic phases. However, the conditions that control the formation of these phases are not well understood. Many factors, including solute elements, melt treatment, iron level and cooling rate, could play a role. The interactions between iron and other common alloying elements in aluminium casting alloys are investigated in the present study. The iron-rich intermetallic phases were characterized using the electron microanalysis technique (EPMA) and compared with the results predicted from Thermocalc~R.
机译：铁是铝铸造合金中最常见和有害的杂质，长期以来一直与性能受损和铸造缺陷增加有关。尽管铁的负面影响显而易见，但其机理尚不完全清楚。它通常与富铁金属间相的形成有关。但是，控制这些相的形成的条件还不是很清楚。许多因素，包括溶质元素，熔体处理，铁含量和冷却速率，都可能起作用。本研究研究了铝铸造合金中铁与其他常见合金元素之间的相互作用。使用电子显微分析技术（EPMA）对富铁金属间相进行了表征，并与Thermocalc〜R预测的结果进行了比较。

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