Precipitation behaviors of spray formed AZ91 magnesium alloy during heat treatment and their strengthening effect
Precipitation behaviors of spray formed AZ91 magnesium alloy during heat treatment and their strengthening effect
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DOI：
10.1016/j.matdes.2008.06.001
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发表时间：
2009-03
影响因子：
8.4
通讯作者：
Jin-feng Huang;Hongtao Yu;Yongbing Li;H. Cui;Jian-ping He;Ji-shan Zhang
中科院分区：
文献类型：
--
作者：
Jin-feng Huang;Hongtao Yu;Yongbing Li;H. Cui;Jian-ping He;Ji-shan Zhang
对喷射成形AZ91镁合金在不同热处理条件下的显微组织进行了表征。研究了喷射成形AZ91镁合金在不同热处理温度和时间下的不同析出行为。喷射成形挤压合金具有细小的晶粒度和较高的溶质含量，在晶界附近易发生DP形核。在365℃热处理时，β-Mg17Al12的网状结构被破坏，细小的连续析出物迅速出现并占据整个样品。平面间距较小的不连续析出物的强化效果优于粗大的连续析出物。
Microstructures of spray formed AZ91 magnesium alloy sample were characterized in various heat treatment conditions. Different precipitation behavior of spray formed AZ91 magnesium alloy were studied at different heat treatment temperatures and hours. It is easier for the spray forming extruded alloy to occur DP nucleation near grain boundary due to fine grain size and high solute content. Network of β-Mg17Al12was broken and fine continuous precipitates appeared quickly and occupied throughout the sample at 365°C heat treatment. Strengthening effect of discontinuous precipitates with small planar distance is better than that of coarse continuous precipitates.