About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Aluminum Alloys, Processing and Characterization
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Presentation Title |
Effects of Si Content on the Conductivity, Microhardness, Microstructure and Hot Tearing of Al-0.8Fe-0.5Mg-0.4Ni Alloys |
Author(s) |
Stephanie Kotiadis, Adam Zimmer, Abdallah Elsayed, Eli Vandersluis, C. Ravindran |
On-Site Speaker (Planned) |
Stephanie Kotiadis |
Abstract Scope |
Electrified automotive powertrain systems require new Al alloys with high castability and high thermal and electrical conductivity. This research presents the effects of Si on the thermal and electrical conductivity, microhardness, and microstructure of Al-0.8Fe-0.5Mg-0.4Ni-xSi alloys. The Al-Fe-Mg-Si-Ni alloys were prepared by mixing pure Al, Fe, and Ni, as well as Al-50 wt.% Mg and Al-50 wt.% Si master alloys at 730°C with varying amounts of Si (0.15-0.45 wt.%). The alloys were characterized using optical and electron microscopy, x-ray diffraction, fluidity testing, microhardness testing and electrical/thermal conductivity measurements. The microstructure contained Chinese script Al-Fe-Si phases when no Ni was present, globular Al-Fe-Ni-Si with the addition of Ni, as well as Mg-Si phases. These phases, in combination with Mg solute added significant hardness to the alloys. The Al-Fe-Mg-Ni-Si alloys showed the necessary high fluidity, high conductivity, and high hardness for use in next-generation automotive powertrains. |
Proceedings Inclusion? |
Planned: Light Metals |