About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
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Symposium
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Ultrafine-grained and Heterostructured Materials (UFGH XI)
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Presentation Title |
N-35: Mechanical and Electrical Properties of an Ultrafine Grained Al-0.7Fe-0.1Si-0.2Er Alloy Processed by ECAP |
Author(s) |
Xingchi He, Yue Zhang, Xiaoguang Yuan, Fuyu Dong, Ruichun Wang, Weiqi Wang |
On-Site Speaker (Planned) |
Xingchi He |
Abstract Scope |
Outstanding mechanical and conducticity properties are vital to Al alloys used in electronic area. However, high strength and high electrical conductivity are mutually exclusive in metallic materials. This study focuses on the effect of equal-channel angular pressing (ECAP) on thermostability, microstructure, mechanical properties and electrical conductivity of an Al-0.7Fe-0.1Si-0.2Er alloy as well as their evolutions after annealing. The ingot was firstly homogenized at 570℃ for 1h, and then extruded 1, 2, 4, 8 passes, respcectively. ECAP processing leads to formation of a very homogeneous ultrafine grained microstructure making the tensile yield strength, ultimate tensile strength, and microhardness of the UFG samples higher than thoes of the CG samples. Though, ECAP processing induces a significant reduction of the electrical conductivity, but it was restored by annealing thanks to the addition of RE atoms, recovery and recrystallization. This study shows that severe plastic deformation has the potential applications in Al alloys conductors. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume; Planned: Supplemental Proceedings volume |