| Issue |
MATEC Web Conf.
Volume 326, 2020
The 17th International Conference on Aluminium Alloys 2020 (ICAA17)
|
|
|---|---|---|
| Article Number | 08006 | |
| Number of page(s) | 8 | |
| Section | New directions in Alloy and Process Development II: Joining, Severe Plastic Deformation, Emerging Processes | |
| DOI | https://doi.org/10.1051/matecconf/202032608006 | |
| Published online | 05 November 2020 | |
Correlation between TEM, SAXS and DSC to investigate the influence of SPD on precipitation mechanisms of an Al-Zn-Mg-Cu alloy
1 Normandie Univ, UNIROUEN, INSA Rouen, CNRS, Groupe de Physique des Matériaux, 76000, Rouen, France
2 Univ. Grenoble Alpes, CNRS, Grenoble INP, SIMaP, F-38000, Grenoble, France
3 School of Engineering, Kyushu Institute of Technology, Kitakyushu, 804-8550, Japan
* Corresponding author: amandine.duchaussoy@uclouvain.be
This study allowed to understand the influence of severe plastic deformation by High Pressure Torsion (HPT) on an Al-Zn-Mg-Cu alloy and more especially the influence on precipitation mechanisms thanks to the correlation between DSC, SAXS and STEM data. A shear strain of γ ≈ 200 was first applied to the alloy. This deformation leads to nanostructuration, creation of high density of defects but also solute segregation to boundaries and dynamic precipitation. These specific microstructural features give rise to an acceleration of precipitation kinetics during heat treatments but also to a lower precipitation temperature and a modification of final precipitates size distribution as compared to the un-deformed alloy.
© The Authors, published by EDP Sciences, 2020
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