State Key Laboratory of Nonferrous Metals and Processes, General Research Institute for
Nonferrous Metals, Beijing 100088, China
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DOI:
10.7502/j.issn.1674-3962.2014.02.07
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Abstract:
High strength high toughness 7XXX series aluminum alloy with low quench sensitivity is the inevitably choice of thick section monolithic structural component to meet the current and future development of aviation industry, and is also the focus of current aerospace aluminum alloy research and development all over the world. This paper introduced the characteristic, development history and present situation of domestic and foreign the aluminum alloy, and summarized its development direction in the future. In recent years, Europe and the United States and other developed countries created a new generation of high strength high toughness and low quench sensitivity 7XXX series aluminum alloy material system represented by 7085 alloy; In our country, a high strength high toughness and low quenching sensitivity aluminum alloy material was also successfully developed, which had completely independent intellectual property rights and excellent comprehensive performance. In the design and production process of the thick section aluminum alloy material, to reduce the quench sensitivity of the alloy as far as possible through the composition optimization design and microstructure control, is the development trend of a new generation of high strength high toughness aluminum alloy material with low quench sensitivity.