| 引用本文: | 李杰,赵志东.关于高强度铝合金 LY12cz 应力腐蚀开裂性能的研究.[J].国防科技大学学报,1985,(3):53-62.[点击复制] |
| Li Jie,Zhao Zhidong.A Study of Stress Corrosion Cracking in High Strength Aluminum Alloys LY12cz[J].Journal of National University of Defense Technology,1985,(3):53-62[点击复制] |
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| 关于高强度铝合金 LY12cz 应力腐蚀开裂性能的研究 |
| 李杰, 赵志东 |
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| 摘要: |
| 本研究采用 DCB试样测试研究了 LY12cz 铝合金在 3.5%NaCl、饱和NaCl及3.5% NaCl+混合缓蚀剂水溶液中应力腐蚀KIscc及 da/dt值；详细研究了Cl- 离子浓度及混合缓蚀剂的作用机理。断口形貌分析表明，LY12cz 铝合金在含Cl-离子水溶液中应力腐蚀开裂断口形貌主要是沿晶断 裂，并具有岩石状沿晶断裂特征。上述混合缓蚀剂虽能改善其应力腐蚀开裂性能，使其裂纹扩展速率显著降低，但不改变其断裂特征。 |
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| 投稿日期：1984-12-17 |
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| A Study of Stress Corrosion Cracking in High Strength Aluminum Alloys LY12cz |
| Li Jie, Zhao Zhidong |
| Abstract: |
| The stress corrosion cracking threshould stress intensity Kiscc and the rate of crack propagation da/dt of aluminum alloys LY12cz in the 3.5% NaCl aqueous solution，in saturated NaCl aqueous solution and in 3.5% NaCl aqueous solution of the containing combinated inhibitor are measured and studied by DCB specimen in this paper，the effect of Cl- concentration and the combinated inhibitor have been analyzed in details. Through scanning electron microscopic fractography，it is shown that the fracture aspects of stress corrosion crack of aluminum a11oys LY12cz in contained Cl- aqueous solution is a intergranular crack and the fracture feature is that of stone. Although the properties of stress corrosion cracking can be improved so as to decrease the rate of crack propagation abviously by the above mentioned combinated inhibitor，it can not be changed for the fracture feature. |
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