Abstract
The effect of Sn addition on the microstructure and mechanical properties of Mg-12Gd-3Y-0.5Zn-0.6Zr (wt%) alloys was investigated. The results show that the microstructure of the as-cast Sn-containing alloys consists of α-Mg, Mg24(RE,Zn)5 and Sn3RE5 phases. The Sn3RE5 phases with superior high temperature stability increase with the Sn content. The Young's modulus of Sn3Gd5 and Sn3Y5 compounds are 109.0 GPa and 119.2 GPa, respectively, which results in the elastic modulus of the alloys increasing with the Sn element. Mg-12Gd-3Y-0.5Zn-0.6Zr–2Sn alloy has the highest elastic modulus of 51.3 GPa. The addition of Sn can significantly increase the number density of fine circular β′ phases in peak-aged alloys. Suitable volume fraction of Sn3RE5 phases, fine DRXed grains, weak basal texture and fine precipitates endow the peak-aged Mg-12Gd-3Y-0.5Zn-0.6Zr–1Sn alloy with excellent comprehensive performance, and its elastic modulus, UTS and YTS are 50.4 GPa, 452 MPa and 368 MPa, respectively.
Sign-in/Register to access full text options 
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 call
