Journal
MATERIALS CHEMISTRY AND PHYSICS
Volume 162, Issue -, Pages 15-19Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.matchemphys.2015.07.033
Keywords
Alloys; Heat treatment; Differential scanning calorimetry (DSC); Mechanical properties; Microstructure
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Funding
- National High Technical Research and Development Program of China [2013AA032403]
- National Natural Science Foundation of China [51301016]
- Fundamental Research Funds for the Central Universities [FRF-TP-14-097A2]
- Opening Project of State Key Laboratory for Advanced Metal Material [2014-ZD05]
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This study reports that Zn addition greatly enhances the bake-hardening response of an Al-Mg-Si-Cu alloy. The pre-aged alloy exhibits a high strength increment of 135 MPa after paint baking. Differential scanning calorimetry, atom probe tomography and high-resolution transmission electron microscopy reveal that Zn addition and pre-aging have significant effects on the solute nanostructure formation. Zn atoms partition into solute clusters/GP zones, and reduce the activation energy of beta precipitation in the alloy. (C) 2015 Elsevier B.V. All rights reserved.
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