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目前关于铝合金的应力腐蚀开裂(SCC)的研究较多地集中在Al-Zn-Mg-Cu系超硬铝的热处理工艺和电化学腐蚀机理等方面,对于锻铝合金的应力腐蚀研究得较少。Al-Mg-Si系低强度锻铝合金(如LD2)产生晶间腐蚀,不产生应力腐蚀。Al-Cu-Mg-Si系高强度锻铝合金有较强的应力腐蚀倾向,国外有少量报导,国内曾出现这类合金的应力腐蚀破坏。研究这类锻铝合金显微组织特征与应力腐蚀开裂机制间关系,有利于全面阐明铝合金应力腐蚀的理论。
At present, the research on stress corrosion cracking (SCC) of aluminum alloy is mainly focused on the heat treatment process and electrochemical corrosion mechanism of Al-Zn-Mg-Cu superhard aluminum. For stress corrosion cracking of wrought aluminum alloy, less. Al-Mg-Si low-strength wrought aluminum alloy (such as LD2) intergranular corrosion occurs, does not produce stress corrosion. Al-Cu-Mg-Si high-strength forged aluminum alloy has a strong tendency of stress corrosion, a small amount of foreign reports, the country had such alloys stress corrosion damage. Studying the relationship between the microstructure characteristics of these wrought aluminum alloys and the stress corrosion cracking mechanism is helpful to fully explain the theory of stress corrosion of aluminum alloy.