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

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