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

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...

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Bibliographic Details
Published in:MATEC web of conferences 2020, Vol.326, p.8006
Main Authors: Duchaussoy, Amandine, Deschamps, Alexis, Sauvage, Xavier, De Geuser, Frédéric, Horita, Zenji
Format: Article
Language:English
Subjects:
Aluminum base alloys
Chemical precipitation
Condensed Matter
Copper
Heat treating
Magnesium
Materials Science
Physics
Plastic deformation
Precipitates
Precipitation heat treatment
Shear strain
Size distribution
Zinc
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Summary: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.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/202032608006