Abstract：The fatigue damage resistance to different corrosion environments in 7475-T7351 aluminum alloy was investigated.It was carried out by axial load fatigue test,fatigue crack growth rate test under different environments.The results show that corrosive environment affects the fatigue resistance of 7475-T7351 aluminum alloy dramatically,and the fatigue strength of smooth specimen in fuel tank or in 3.5%(mass fraction)NaCl solution decreases by 68% in comparision to room temperature,and the influence of different environments including water in fuel tank and 3.5%NaCl solution on the fatigue strength of materials is almost the same.The different corrosion environments and different temperature on low cycle fatigue in 7475-T7351 are less effective.The corrosive environment accelerates strongly the rate of fatigue crack propagation.The water in fuel tank and 3.5% NaCl solution all accelerate fatigue crack propagation by almost the same pattern.
宫玉辉, 刘铭, 张坤, 黄敏, 伊琳娜, 戴圣龙. 不同腐蚀环境对7475-T7351铝合金疲劳性能及裂纹扩展速率的影响[J]. 材料工程, 2010, 0(9): 71-73.
GONG Yu-hui, LIU Ming, ZHANG Kun, HUANG Min, YI Lin-na, DAI Sheng-long. Effects of Different Corrosion Environments on Fatigue Property and Crack Growth Rate in 7475-T7351 Aluminum Alloy. Journal of Materials Engineering, 2010, 0(9): 71-73.
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