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Effect of Ag and Cu addition on the strength and electrical conductivity of Al-Mg-Si alloys using conventional and modified thermomechanical treatments

Khangholi Siamak Nikzad, Javidani Mousa, Maltais Alexandre et Chen X.-Grant. (2022). Effect of Ag and Cu addition on the strength and electrical conductivity of Al-Mg-Si alloys using conventional and modified thermomechanical treatments. Journal of Alloys and Compounds, 914, e165242.

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URL officielle: http://doi.org/10.1016/j.jallcom.2022.165242

Résumé

The effect of adding Ag and Cu on the strength and electrical conductivity of Al-Mg-Si conductor alloys was investigated using conventional and modified thermomechanical treatments. In the conventional thermomechanical treatment, the addition of Ag and Cu moderately increased the strength from 296 MPa to 305–316 MPa above the minimum required electrical conductivity (52.5% IACS) compared to that of the base alloy. However, the modification of the thermomechanical treatment could maximize the efficiency of Ag and Cu addition at strengths above 52.5% IACS, exhibiting that the strength was increased from 317 MPa to 341–348 MPa with the Ag and Cu additions. All alloys under the modified thermomechanical treatment (MTMT) showed a superior strength and electrical conductivity compared to their counterparts under the conventional thermomechanical treatment (CTMT), resulting in a wider window in the high end of strength and electrical conductivity. In addition, MTMT led to a shorter post-aging time to reach the minimum required EC, compared to CTMT. The precipitate characteristics under both thermomechanical treatment conditions were analyzed and quantified using differential scanning calorimetry and transmission electron microscopy (TEM). The TEM results revealed that the alloys under MTMT had a higher precipitate number density by more than three times compared to their counterparts under CTMT, leading to the higher strength levels in the MTMT alloys. Strength and electrical resistivity models were then applied to understand the multiple contributions of the main strengthening mechanisms and microstructure features to the mechanical strength and electrical conductivity.

Type de document:Article publié dans une revue avec comité d'évaluation
ISSN:09258388
Volume:914
Pages:e165242
Version évaluée par les pairs:Oui
Date:2022
Identifiant unique:10.1016/j.jallcom.2022.165242
Sujets:Sciences naturelles et génie > Génie
Sciences naturelles et génie > Génie > Génie des matériaux et génie métallurgique
Sciences naturelles et génie > Sciences appliquées
Département, module, service et unité de recherche:Départements et modules > Département des sciences appliquées > Module d'ingénierie
Mots-clés:Al-Mg-Si conductor alloys, electrical conductivity, mechanical properties, Ag/Cu additions, modified thermomechanical treatment, alliages conducteurs Al-Mg-Si, conductivité électrique, propriétés mécaniques, additions Ag/Cu, traitement thermomécanique modifié
Déposé le:09 juin 2022 14:54
Dernière modification:09 juin 2022 14:54
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