Abstract
In this study, Al-Si-Mg composites were prepared by adding different combinations of titanium (Ti), zirconium (Zr), boron (B), and antimony (Sb)，and its micro-structure and mechanical properties were investigated. The results revealed that the average diameter of α-Al grains in the novel alloy, prepared through the combined addition of Ti, Zr, B, and Sb, was 110 µm, with a secondary dendritic arm spacing (SDAS) of 22.4 µm. This grain refinement is attributed to the in-situ formation of heterogeneous nucleation sites L12-(Al, Si)3(Ti, Zr). The alloy heat-treated at T6 exhibited notable mechanical characteristics, including a tensile strength of 354.5 MPa, a yield strength of 317.9 MPa, and an elongation at break of 5.6%. Significantly, the enhancement in mechanical properties is found to be independent of the modifications of eutectic silicon. This improved strength and elongation are attributed to both grain refinement and the in-situ formation of I4-(Al, Si)3(Ti, Zr). Overall, these findings provide an effective and direct method for obtaining high-performance Al-Si-Mg composites.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
