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Effect of pre-deformation on age-hardening behaviors in an Al-Mg-Cu alloy

Abstract

The effects of 3%–50% pre-deformation following solution heat treatment on the age hardening of an Al-3Mg-1Cu alloy have been investigated by Vickers microhardness measurement, tensile tests, differential scanning calorimetry, scanning electron microscopy, and transmission electron microscopy. Pre-deformation has a strong effect on subsequent age-hardening behavior. The precipitation was accelerated, hardness peaks appeared earlier, formation of clusters was inhibited, and a larger fraction of precipitates was observed along the dislocation lines. The contribution of the precipitates to the hardness was evaluated by dissolution tests. It was found that pre-deformation followed by artificial aging resulted in a good strength-elongation balance. The results are significant for the development of combined mechanical deformation and heat treatment processes.
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Category

Academic article

Language

English

Author(s)

  • Xuanliang Chen
  • Kim Daehan
  • Minho O
  • Calin Daniel Marioara
  • Sigmund Jarle Andersen
  • Adrian Lervik
  • Randi Holmestad
  • Equo Kobayashi

Affiliation

  • SINTEF Industry / Materials and Nanotechnology
  • Norwegian University of Science and Technology
  • Tokyo Institute of Technology
  • South Korea

Year

2021

Published in

Materials Science & Engineering: A

ISSN

0921-5093

Volume

820

View this publication at Norwegian Research Information Repository