Correlation between TEM, SAXS and DSC to investigate the influence of SPD on precipitation mechanisms of an Al-Zn-Mg-Cu alloy

Amandine Duchaussoy, Alexis Deschamps, Xavier Sauvage, Frédéric De Geuser, Zenji Horita, F. De Geuser, A. Deschamps, J.-C. Ehrström, P. Jarry, G. Salloum-Abou-Jaoude, L. Salvo, C. Sigli
2020 MATEC Web of Conferences  
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
more » ... ostructural 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.
doi:10.1051/matecconf/202032608006 fatcat:fnhyoyxpifdnzetz4zhtaabwgm