| 高强铝合金晶界偏析与氢致断裂机理的研究 |
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| 引用本文： | 宋仁国,张宝金,曾梅光.高强铝合金晶界偏析与氢致断裂机理的研究[J].航空材料学报,1997(1). |
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| 作者姓名： | 宋仁国 张宝金 曾梅光 |
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| 作者单位： | 西北工业大学(宋仁国)，东北大学(张宝金，曾梅光) |
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| 摘 要： | 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。
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| 关 键 词： | 高强铝合金 晶界偏析 氢致断裂 准化学理论 |
INVESTIGATION OF GRAIN BOUNDARY SEGREGATION AND HYDROGEN-INDUCED FRACTURE MECHANISM IN HIGH STRENGTH ALUMINUM ALLOY |
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| Song Renguo.INVESTIGATION OF GRAIN BOUNDARY SEGREGATION AND HYDROGEN-INDUCED FRACTURE MECHANISM IN HIGH STRENGTH ALUMINUM ALLOY[J].Journal of Aeronautical Materials,1997(1). |
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| Authors: | Song Renguo |
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| 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. |
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| Keywords: | high strength aluminum alloy grain boundary segregation hydrogen-induced fracture quasichemical theory |
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