1School of Materials Science and Engineering, Central South University, 2Shanghai Aircraft Design and Research Institute of COMAC,
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DOI:
10.7502/j.issn.1674-3962.2016.11.07
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Abstract:
In order to face the fierce substitution competition from the composites and other structural materials and meet the strict requirements of new generation airplane for the service performance of the aluminium alloys, scientists and engineers need to keep developing new aluminium alloys with comprehensive performance and their processing technology, and to investigate the processing principle and technology of material/structural parts integration. Compared with the composites, new generation aluminium-lithium alloys are lighter, with lower risk, less expensive to manufacture, operate and repair than composites-intensive planes. It becomes an important technology to support new generation airplanes by new aluminium-lithium alloys in combination with advanced structural concepts. The development history of aluminium-lithium alloys and typical alloy compositions, properties and applications in different stages are briefly reviewed, as well as the superplasticity technology of aluminium-lithium alloys and their application in aerospace industries. The development trade of composition design and microstructure control in new generation aluminium-lithium alloys are introduced, and their application prospect is discussed.