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应用灰色关联分析方法考察了孔洞大小、硅颗粒大小、二次枝晶臂间距(SDAS)以及硬度等对A319铸造铝合金疲劳寿命的影响程度.分析A319铸造铝合金的疲劳寿命的主、次要影响因素.研究表明:对变质处理的铸造铝合金的影响程度从大到小依次为硬度、硅颗粒的大小、SDAS和孔洞大小.未变质处理的铸造铝合金的影响程度从大到小依次则为硬度、硅颗粒的大小、孔洞大小和二次枝晶臂间距.

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