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Title: | Microstructure evolution and mechanical properties of new die-cast Al-Si-Mg-Mn alloys |
Authors: | Cai, Q Mendis, CL Chang, ITH Fan, Z |
Keywords: | aluminium alloys;CALPHAD;high pressure die casting;mechanical properties;microstructure |
Issue Date: | 29-Nov-2019 |
Publisher: | Elsevier |
Citation: | Cai, Q. et al. (2020) 'Microstructure evolution and mechanical properties of new die-cast Al-Si-Mg-Mn alloys', Materials & Design, 187, 108394, pp. 1 - 11. doi: 10.1016/j.matdes.2019.108394. |
Abstract: | Copyright © 2019 Brunel Centre for Advanced Solidification Technology, Brunel University London. The microstructure evolution and mechanical properties of recently developed die-cast Al-Si-Mg-Mn alloys were investigated. CALPHAD modelling, based on the thermodynamic database, was carried out to design Al-Si-Mg-Mn alloys with different solid fractions of the eutectic mixture. Experimental results confirmed that the new Al-Si-Mg-Mn alloys have excellent yield strength of 230–280 MPa, ultimate tensile strength of 340–370 MPa and elongation to fracture of 2.3–4.3% from the standard tensile samples under as-cast condition. The as-cast microstructure consists of α-Al, α-AlFeMnSi, binary eutectic (Al + Mg2Si) and ultrafine quaternary eutectic (Si + α-Al + Mg2Si + π-AlFeMnSiMg). The high strength is induced by the formation of multi-scale eutectic mixtures and fine α-AlFeMnSi particles. The newly designed Al-Si-Mg-Mn alloys offer 20–50% increase in yield strength with good ductility, as compared with the commercially available die-cast aluminium alloys. |
Description: | Data availability: The raw/processed data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study. Supplementary data are available online at https://www.sciencedirect.com/science/article/pii/S0264127519308329?via%3Dihub#s0095 . The authors would like to thank Experimental Techniques Centre Brunel University London for the access to microstructure characterisation facilities. |
URI: | https://bura.brunel.ac.uk/handle/2438/19758 |
DOI: | https://doi.org/10.1016/j.matdes.2019.108394 |
ISSN: | 0264-1275 |
Appears in Collections: | Brunel Centre for Advanced Solidification Technology (BCAST) |
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