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材料工程  2008 

非对称/对称轧制AZ31镁合金微观组织研究

, PP. 25-28

Keywords: 非对称轧制,对称轧制,AZ31镁合金板材,微观组织,有限元

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Abstract:

研究了非对称轧制和对称轧制过程中,AZ31镁合金板材微观组织的变化特征,并结合有限元模拟对其差异进行了分析。结果表明,非对称轧制可明显细化板材的晶粒,可获得平均晶粒度约为8.9μm均匀分布的等轴晶组织,且其(0002)基面晶粒取向明显减弱;而对称轧制板材晶粒分布不均匀且有大量的孪晶存在,平均晶粒度达13.2μm。这主要是因为,与对称轧制相比,非对称轧制沿板材厚向引入了强烈的剪切应变所致。

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