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铝/钢异种金属焊接接头界面Al-Fe金属间化合物生成及其热力学分析

, PP. 1037-1041

Keywords: 金属材料,铝/钢焊接,金属间化合物,热力学分析

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Abstract:

对铝/钢异种金属焊接接头界面进行了XRD和EDS分析,结果表明:在Al-Fe界面上主要生成Fe2Al5和FeAl3两种金属间化合物,以热力学基本定律为基础,建立了基于相图的Al-Fe金属间化合物形成的吉布斯自由能计算模型,利用该模型分别计算了各Al-Fe金属间化合物形成的吉布斯自由能随温度变化的关系。结果表明,生成Fe2Al5的吉布斯标准自由能比生成FeAl3的低,所以在铝/镀锌钢板的焊接过程中,Fe2Al5要比FeAl3优先生成。

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