先进铝锂合金的特点及其在民用飞机上的应用

航空产品通常对其重量有严格要求，当前最有效的减重方法是发展低密度材料。介绍低密度、高强度且具有良好损伤容限特性的铝锂合金材料；通过其与常规铝合金、先进复合材料的性能对比和权衡研究，重点分析第三代先进铝锂合金的性能特点及其在民用飞机上的应用；给出铝锂合金国产化应用建议。研究结果可作为民用飞机设计选材和减重优化的参考和借鉴，有助于铝锂合金材料的推广应用。

Al-Li alloy properties and applications on the commercial aircraft

Weight is one of the most important performances for the aviation productions. The most effective approach to weight saving is developing the lower density material. Introduce advanced Al-Li (Aluminum-Lithium) alloy with lower density, higher tensile strength, better damage tolerance etc. Compare to conventional aluminum alloys and trade-off study with advanced composites. Analysis the properties of 3rd-generation Al-Li alloy and the applications on advanced aircraft. Provide the proposals of applications in civil program. The research can be the reference of materials selection and weight saving for commercial aircraft, and benefit extending applications of Al-Li alloy.