Influence of deformation and annealing on electrical conductivity, mechanical properties and texture of Al-Mg-Si alloy cables

• Published in: Materials science & engineering. A, Structural materials : properties, microstructure and processing Vol. 710; pp. 27 - 37
• Main Authors: Zhang, Jiayi, Ma, Mingyang, Shen, Fanghua, Yi, Danqing, Wang, Bin
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 05.01.2018; Elsevier BV
• Subjects: Al-Mg-Si alloy cable; Alloys; Aluminum base alloys; Annealing; Conductivity; Deformation; Dislocation density; Electric cables; Electrical conductivity; Electrical engineering; Electrical resistivity; Grain boundaries; Magnesium base alloys; Mechanical properties; Recrystallization; Texture; Yield strength; Yield strength; Annealing; Deformation; Electrical conductivity; Al-Mg-Si alloy cable
• ISSN: 0921-5093; 1873-4936
• DOI: 10.1016/j.msea.2017.10.065

Al-Mg-Si alloys are medium-strength high-conductivity alloy cable materials that are ideal candidates for electrical engineering applications, but their related electrical conductivity, mechanical properties and textures must be studied in greater detail before such applications can be realized. Different deformation strains (0.98, 1.73 and 2.24) and annealing temperatures (200–500°C) were applied to optimize these properties in Al-Mg-Si alloy cables. The results show that the recrystallized Al-Mg-Si alloy cables exhibit medium yield strength and higher electrical conductivity compared to the non-recrystallized Al-Mg-Si alloy cables with larger average grain sizes. After annealing, the main contributors to the overall texture were the Brass and Goss textures. According to theoretical evaluations, the significant increase in electrical conductivity and decrease in yield strength can be attributed to the decreasing dislocation density and changes to the grain boundaries.