论文部分内容阅读
根据国内新机种的发展情况,现在使用的变形铝合金牌号和状态已明显不能满足要求,特别是要延长飞机的使用寿命,更不能单纯从材料的静强度要求来考虑,而必须从材料的断裂韧性、疲劳性能、抗应力腐蚀和抗剥落腐蚀等诸因素综合地考虑设计要求。因此,目前国内使用最广泛的高强度铝合金 LC4、LC9(相当于美国的7075合金)强度最高时的 T6状态,由于其应力腐蚀开裂(SCC)敏感和易剥落腐
According to the development of new domestic models, the current deformation of aluminum alloy grades and status has obviously can not meet the requirements, in particular, to extend the life of the aircraft, not just from the static strength of the material to consider, but must be from the material Fracture toughness, fatigue properties, anti-stress corrosion and anti-spalling corrosion and other factors comprehensively consider the design requirements. Therefore, at present the most widely used high strength aluminum alloy LC4, LC9 (equivalent to the United States 7075 alloy) T6 state when the highest strength, due to its stress corrosion cracking (SCC) sensitive and easy to peel off