目前不少飞机已超过了原来的使用设计寿命，这些飞机上损伤的构件往往需要更换。用新改进的高强度铝合金来代换老龄飞机的老材料有可能提高构件的性能及寿命。本文介绍在材料代换时应考虑的各种因素。 At present, many aircraft have exceeded the original design life, the damage on these aircraft components often need to be replaced. Replacing older aircraft with older, newer, high-strength aluminum alloys is likely to improve component performance and longevity. This article describes the various factors that should be considered when replacing materials.