Design of new MG-based glass forming compositions using liquidus temperaure calculations correlated with an elastic strain model

Abstract

New Mg-based glass-forming compositions have been designed based upon the convergence of two existing predictive models; (1) a liquidus model developed by Cheney and Vecchio, and (2) an elastic strain model proposed by Miracle and Senkov. According to these models, alloys compositionally located near a deep eutectic, while simultaneously containing a topology that induces significant elastic strain in a developing crystalline lattice, exhibit experimentally good glass-forming ability. In light of this, the Mg-Cu-Y (MCY), Mg-Cu-Zn (MCZ) and Mg-Zn-Sm (MZS) systems were investigated as it appeared that these systems have optimised values for both liquidus profiles and elastic strains across broad compositional ranges. Three additional mathematical criteria used to evaluate other factors thought to influence glass-forming ability including concentration dependence, reduced melting temperature, and the electronegativity difference for these systems have also been examined.