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Springback analysis of AA5754 after hot stamping: experiments and FE modelling

  • Ailing WangEmail author
  • Kai Zhong
  • Omer El Fakir
  • Jun Liu
  • Chaoyang Sun
  • Li-Liang Wang
  • Jianguo Lin
  • Trevor A. Dean
Open Access
ORIGINAL ARTICLE

Abstract

In this paper, the springback of the aluminium alloy AA5754 under hot stamping conditions was characterised under stretch and pure bending conditions. It was found that elevated temperature stamping was beneficial for springback reduction, particularly when using hot dies. Using cold dies, the flange springback angle decreased by 9.7 % when the blank temperature was increased from 20 to 450 °C, compared to the 44.1 % springback reduction when hot dies were used. Various other forming conditions were also tested, the results of which were used to verify finite element (FE) simulations of the processes in order to consolidate the knowledge of springback. By analysing the tangential stress distributions along the formed part in the FE models, it was found that the springback angle is a linear function of the average through-thickness stress gradient, regardless of the forming conditions used.

Keywords

Springback Warm stamping Hot stamping Stretch bending Pure bending Aluminium alloy AA5754 

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Copyright information

© The Author(s) 2016

Open Access This article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made.

Authors and Affiliations

  • Ailing Wang
    • 1
    Email author
  • Kai Zhong
    • 1
  • Omer El Fakir
    • 1
  • Jun Liu
    • 1
  • Chaoyang Sun
    • 2
  • Li-Liang Wang
    • 1
  • Jianguo Lin
    • 1
  • Trevor A. Dean
    • 3
  1. 1.Department of Mechanical EngineeringImperial College LondonLondonUK
  2. 2.School of mechanical engineeringUniversity of Science and Technology BeijingBeijingChina
  3. 3.School of Mechanical EngineeringThe University of BirminghamBirminghamUK

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