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首页> 外文会议>2006 BIMW >Homogenization Treatment of an Al-Li-Cu-Mg-Mn-Zr Alloy
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Homogenization Treatment of an Al-Li-Cu-Mg-Mn-Zr Alloy

机译：Al-Li-Cu-Mg-Mn-Zr合金的均质处理

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A systematic homogenization treatment on Al-Li-Cu-Mg-Mn-Zr alloy, within the temperature range from 500°C to 540°C for 24h or 36h was conducted. Microstructure and alloying elements distribution before and after homogenization treatment were studied by optical microscope, SEM, EDS and XRD. The results showed that in the as-cast condition Cu segregated at grain boundary and formed θ(Al_2Cu) phase. With the homogenization temperature increased and time prolonged, the amount of the remained particles at grain boundaries decreased, and the alloying elements distribution became more homogeneous. It has been found that the homogenization temperature has more obvious effects on the microstructure and mechanical properties than time. However, the alloy homogenized at temperatures above 540°C was overheated. Furnace cooling generates large amounts of precipitates in the matrix. The best homogenization parameter of the Al-Li-Cu-Mg-Mn-Zr alloy was determined as 530°C for 24 h followed by air cooling.
机译：对Al-Li-Cu-Mg-Mn-Zr合金在500°C至540°C的温度范围内进行了24h或36h的系统均质化处理。通过光学显微镜，SEM，EDS和XRD研究了均质处理前后的组织和合金元素分布。结果表明，在铸态条件下，Cu在晶界偏析并形成θ（Al_2Cu）相。随着均质温度的升高和时间的延长，晶界处的残留颗粒数量减少，合金元素分布变得更加均匀。已经发现，均质温度对显微组织和机械性能的影响比时间更明显。然而，在高于540℃的温度下均质化的合金过热。炉子冷却在基质中产生大量沉淀物。确定Al-Li-Cu-Mg-Mn-Zr合金的最佳均化参数为530°C 24小时，然后进行空气冷却。

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