Publication
Title
Clustering behavior during natural aging and artificial aging in Al-Mg-Si alloys with different Ag and Cu addition
Author
Abstract
The effect of Ag and Cu addition on clustering behavior of Al-Mg-Si alloys during natural aging (NA) and artificial aging (AA) was investigated by hardness measurement, tensile test and atom probe tomography analysis. The results show that both Ag and Cu atoms could enter clusters and GP-zones, change the Mg/Si ratio and increase their volume fractions. Compared with the Al base alloy, the clusters in the Ag/Cu-added alloys more easily transform to beta" phases for size and compositional similarity, and the strengthening ability of these particles is enhanced by the increased volume fraction and shear modulus. In NA condition, Cu is greater in improving the volume fraction of clusters than Ag and thus produces higher T4 temper hardness. In AA condition, in contrary, Ag is more effective in facilitating the formation and growth of particles than Cu due to the stronger Ag-Mg interaction and the high diffusivity of Ag atoms in Al matrix, leading to highest hardening response. Compared to the Cu-added alloy, the Ag-added alloy shows higher precipitation kinetics during AA treatment and maintains a lower T4 temper hardness.
Language
English
Source (journal)
Materials science and engineering: part A: structural materials: properties, microstructure and processing. - Lausanne
MICROSTRUCTURE AND PROCESSING
Publication
Lausanne : 2018
ISSN
0921-5093
DOI
10.1016/J.MSEA.2018.07.018
Volume/pages
732 (2018) , p. 273-283
ISI
000441486100032
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identifier
Creation 07.09.2018
Last edited 09.10.2023
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