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Volume 4 Issue 3
Apr.  2022
Article Contents

Fan X B, Yuan S J. 2022. Innovation for forming aluminum alloy thin shells at ultra-low temperature by the dual enhancement effect. Int. J. Extrem. Manuf. 4 033001.
Citation: Fan X B, Yuan S J. 2022. Innovation for forming aluminum alloy thin shells at ultra-low temperature by the dual enhancement effect. Int. J. Extrem. Manuf. 033001.

Innovation for forming aluminum alloy thin shells at ultra-low temperature by the dual enhancement effect


doi: 10.1088/2631-7990/ac6b62
More Information
  • Publish Date: 2022-04-26
  • Integral thin shells made of high strength aluminum alloys are urgently needed in new generation transportation equipment. There are challenges to overcoming the co-existing problems of wrinkling and splitting by the cold forming and hot forming processes. An innovative technology of ultra-low temperature forming has been invented for aluminum alloy thin shells by the new phenomenon of ‘dual enhancement effect’. That means plasticity and hardening are enhanced simultaneously at ultra-low temperatures. In this perspective, the dual enhancement effect is described, and the development, current state and prospects of this new forming method are introduced. This innovative method can provide a new approach for integral aluminum alloy components with large size, ultra-thin thickness, and high strength. An integral tank dome of rocket with 2 m in diameter was formed by using a blank sheet with the same thickness as the final component, breaking through the limit value of thickness-diameter ratio.

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Innovation for forming aluminum alloy thin shells at ultra-low temperature by the dual enhancement effect

doi: 10.1088/2631-7990/ac6b62
  • 1 School of Mechanical Engineering, Dalian University of Technology, Dalian, People’s Republic of China;
  • 2 School of Materials Science and Engineering, Harbin Institute of Technology, Harbin, People’s Republic of China

Abstract: 

Integral thin shells made of high strength aluminum alloys are urgently needed in new generation transportation equipment. There are challenges to overcoming the co-existing problems of wrinkling and splitting by the cold forming and hot forming processes. An innovative technology of ultra-low temperature forming has been invented for aluminum alloy thin shells by the new phenomenon of ‘dual enhancement effect’. That means plasticity and hardening are enhanced simultaneously at ultra-low temperatures. In this perspective, the dual enhancement effect is described, and the development, current state and prospects of this new forming method are introduced. This innovative method can provide a new approach for integral aluminum alloy components with large size, ultra-thin thickness, and high strength. An integral tank dome of rocket with 2 m in diameter was formed by using a blank sheet with the same thickness as the final component, breaking through the limit value of thickness-diameter ratio.

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