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最近为宇航工业生产的铝合金和所发展的状态,与较老的合金7075-T6和2024-T3相比,在强度、断裂韧性、抗剥落腐蚀和抗应力腐蚀方面提供了良好的综合性能.然而,为了进一步提高一些飞机结构部件的可靠性或工作能力,则要求提高周期载荷裂纹扩展抗力.因此,为了弄明白显微组织如何影响疲劳裂纹的扩展,做了许多工作.对大部分结构材料来说,在提高疲劳裂纹扩展抗力的同时,不得损失其承受高的单向载荷的能力.所以,必须号虑强度和韧性.本文的目的是要说明,某些显微组织是怎
Recent developments in the aluminum alloys for the aerospace industry and their development have provided good overall performance in terms of strength, fracture toughness, exfoliation resistance and stress corrosion resistance over the older alloys 7075-T6 and 2024-T3. However, in order to further improve the reliability or workability of some aircraft structural components, it is required to improve the cyclic load crack propagation resistance.Thus, in order to find out how the microstructure affects the fatigue crack growth, a lot of work has been done.For most structural materials , The fatigue crack propagation resistance is increased without sacrificing its ability to withstand high unidirectional loads, so strength and toughness must be considered.The purpose of this paper is to show how certain microstructures