Insight into the partial solutionisation of a high pressure die-cast Al-Mg-Zn-Si alloy for mechanical property enhancement
Insight into the partial solutionisation of a high pressure die-cast Al-Mg-Zn-Si alloy for mechanical property enhancement
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DOI：
10.1016/j.msea.2016.11.028
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发表时间：
2017-01
期刊：
影响因子：
6.4
通讯作者：
Wenchao Yang;Lin Liu;Jun Zhang;S. Ji
中科院分区：
文献类型：
--
作者：
Wenchao Yang;Lin Liu;Jun Zhang;S. Ji
为提高压铸铝镁锌硅合金的力学性能，对部分固溶处理进行了研究。其强化机制是铸态组织中形成的η金属间化合物和平衡相α在固溶过程中部分溶解到η-Al基体中，在随后的时效过程中析出细小的半共格相。因此，这种独特的组织特征是：η-Al基合金中的平衡相η‘-镁锌相和亚稳的α’-镁锌相共存，以及Al-镁-锌-硅合金中未改变的镁硅共晶和残留的镁32(Al，锌)49金属间化合物。
A partial solution treatment was investigated to enhance the mechanical properties for a die-cast Al-Mg-Zn-Si alloy. The strengthening mechanism was identified that the Mg32(Al, Zn)49intermetallics and equilibrium η-MgZn2phase formed in the as-cast microstructure were partially dissolved into the α-Al matrix during solutionising and the fine semi-coherent η'-MgZn2phase was precipitated during subsequent aging. Consequently, the unique microstructure was characterised by the co-existence of equilibrium η-MgZn2phase and metastable η'-MgZn2phase in the α-Al matrix, together with the un-changed Mg2Si eutectic and remnant Mg32(Al, Zn)49intermetallics in the Al-Mg-Zn-Si alloy.