提出了一个三元合金晶界偏析与沿晶断裂模型,并将该模型与准化学理论相结合,研究了高强铝合金Mg、H晶界偏析对沿晶断裂功的影响。结果表明,Mg、H偏析均使沿晶断裂功下降,且H比Mg脆化晶界严重。这与7075铝合金的应力腐蚀实验结果相一致。
Abstract
The model of grain boundary segregation and intergranular fracture for a trinary alloy was proposed in this paper. The effects of Mg, H grain boundary segregation on intergranular fracture work in high strength aluminum alloy were investigated by using the model combined with quasichemical theory. The results indicated that both Mg and H segregation result in a decreas of the intergranular fracture energy and hydrogen embrittles grain boundary more intense than magnesium does,which is consistent with the experimental results of stress corrosion for 7075 aluminum alloy.
关键词
高强铝合金 /
晶界偏析 /
氢致断裂 /
准化学理论
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Key words
high strength alumin /
grain boundary segre /
hydrogen-induced fra /
quasichemical theory
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参考文献
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