一代材料技术，一代大型飞机

 介绍了用于大型飞机的新材料的发展现状和趋势。当前，欧美大型飞机机体的材料结构正从以铝合金为主过渡至以复合材料为主，50%复合材料用量是未来飞机的起点。新一代大型飞机的材料技术特色首先是复合材料和钛合金用量创历史新高，以大幅度减轻飞机结构重量和降低燃油消耗;其次反映于一些具有新意的材料技术的成功推出，其中包括复合材料整体机身段、全钛发动机挂架、纤维金属层板、第3代铝锂合金、新型高强铝合金7085、新型高强高韧钛合金Ti-55531等。最后,对中国刚立项研制的大型飞机的选材原则提出了建议。

One Generation of Material Technology, One Generation of Large Aircraft

The present development and tendency of new materials used in large aircraft are introduced.The primary structural materials used for current American and European large airframes are undergoing a transition from aluminum alloys to advanced composites,and 50% of composites seems to be a starting point for future aircraft.The material technology for new generation large aircraft will be characterized primarily by the record-high application of composite materials and titanium alloys,in order to reduce the structural weight and fuel consumption significantly.The new generation aircraft material technology is also featured by the successful introduction of innovative materials,including integrated composite fuselage section,all-titanium engine pylon,fiberreinforced metal laminate,third generation Al-Li alloy,new high-strength aluminum alloy 7085 and new high-strength and high-toughness titanium alloy Ti-55531,etc.In the end,suggestions are made to the principle of material selection for the newly launched National Large Aircraft Research Program.