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Effect of magnesium on dispersoid strengthening of Al-Mn-Mg-Si(3xxx) alloys
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作者 李震 张展 x-grant ghen 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2016年第11期2793-2799,共7页
The effects of magnesium addition on the dispersoid precipitation as well as mechanical properties of 3xxx alloys wereinvestigated. The microstructures in as-cast and heat-treated conditions were evaluated by optical ... The effects of magnesium addition on the dispersoid precipitation as well as mechanical properties of 3xxx alloys wereinvestigated. The microstructures in as-cast and heat-treated conditions were evaluated by optical microscopy and transmissionelectron microscopy. The results reveal that Mg has a strong influence on the distribution and volume fraction of dispersoids duringprecipitation heat treatment. The microhardness and yield strength at ambient temperature increase with increasing Mg content. Thesolid solution and dispersoid strengthening mechanisms of materials after heat treatment are quantitatively analyzed. Dispersoidstrengthening for the alloys is the predominant strengthening mechanism after precipitation heat treatment. An analytical model isintroduced to predict the evolution of ambient-temperature yield strength. 展开更多
关键词 aluminum alloy Mg dispersoid strengthening solid solution strengthening microstructure characterization mechanicalproperties
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