Effect of pre-stretching on synchronization of shape and property in creep age forming of 2124 aluminum alloy

作者：XU Fu shun; ZHANG Jin; DENG Yun lai; ZHANG Xin ming

来源：中国有色金属学报, 2017, 27(1).

• creep age forming
• aluminum alloy
• pre-stretching
• springback

Based on a four-point-bend forming tools,the effect ofpre-stretching on the synchronization of springback and mechanical property in creep age forming of 2124 aluminum alloy was investigated by optical microscopy (OM),transmission electron microscopy (TEM),and tests of springback and mechanical property.The results show that choosing a proper pre-deformation can achieve coupling control of the forming target and the material property in creep age forming process.As the pre-stretching degree increasing,the springback decreases firstly,reaches the minimum value at the pre-stretching degree of 3％,and then rises again slowly.And the strength property curves of the 2124 aluminum alloy present a bimodal variation characteristic,the corresponding pre-stretching at the two peak points are 2％ and 5％,respectively,and the minimum point exists at pre-streching of 3％.With comprehensive consideration of the mechanical property and the springback,the recommendatory pre-stretching range of the creep age forming of 2124 aluminum alloy sheets is 1.5％-2.5％.

• 单位
  中南大学