Engineering the heterogeneous nuclei in Al-Si alloys for solidification control
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Bolzoni, L., & Hari Babu, N. (2016). Engineering the heterogeneous nuclei in Al-Si alloys for solidification control. Applied Materials Today, 5, 255–259. http://doi.org/10.1016/j.apmt.2016.11.001
Permanent Research Commons link: https://hdl.handle.net/10289/10768
Aluminium alloys are particularly advantageous for transportation industries to reduce the weight of the vehicles and thus pollution. The optimisation of the performances of Al alloys can be achieved by engineering and enhancing the heterogeneous nucleation of the melt. In this work, we demonstrate how the inoculation of commercial Al-Si alloys by Nb-based phases permits to improve and control the solidification process. We show that NbB2/Al3Nb are potent heterogeneous nucleation substrates for Al-Si alloys. The improved nucleation makes the material structure less dependent on the processing conditions such as solidification time and chemistry of the alloy (i.e. Si content). This permits to design and fabricate lighter structural components with improved and more isotropic performances.
© 2016 The Authors. Published by Elsevier Ltd. This is an open access article under the CC BY license