采用2A+4BA+2A混合路径对高含量Mg2Si的双相Al-10Mg-4Si合金在250 ℃进行ECAP 8道次挤压来考察其对第二相颗粒分散及合金力学性能的影响,同时与BC路径挤压做对比.对铸态和挤压态合金采用SEM、TEM进行组织观察、室温拉伸试验进行力学性能测试.结果表明,2A+4BA+2A路径挤压使铸态合金组织明显细化、第二相颗粒均匀分布于基体、合金的力学性能显著提高,表明通过ECAP基本路径的组合来实现组织细化兼顾第二相均匀分散来进一步提高材料的力学性能是可行的.
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