Enhanced glass forming ability and plasticity in Mg-based bulk metallic glasses

A new criterion for evaluating the glass-forming ability of bulk glass forming alloys

“…Table 1 presents the T g , T x , T l , and the calculated T rg , γ, δ, ϕ and β for the already reported BMGs based on Cu [4,[10][11][12][13][14][15][16][17][18][19][20], Ca [4,21,22], Mg [4,10,11,[23][24][25][26], La [10,11,27,28], Pd [10,11,29], Ti [10,11,[30][31][32], Pr [11], Y [10] and Co [33,34]. The majority of the characteristic temperatures were measured by DSC or/and DTA at a heating rate of 20 K/min.…”

Evaluation of glass-forming ability in metals using multi-model techniques

“…As shown in Fig. 4a, the most successful alloy in a study performed by Park et al [17], Mg 65 Cu 7.5 Ni 7.5 Ag 5 Zn 5 Gd 5 Y 5 (D max = 14 mm), lies near a eutectic indicated by the compositional band of elevated˛parameters. This diagram is a pseudo-ternary plot in which Mg, Cu, and Y are varied and Ni, Gd, Zn, and Ag are held constant at the values indicated above the diagram.…”

“…Mg-based bulk metallic glasses have potential due to their ability to form strong low density alloys in relatively large specimen thicknesses, up to 14 mm [17], as compared to another potential light weight metallic glass, Al. The modeling results for a wellresearched system, Mg-Cu-Y, are shown in Fig.…”

“…This diagram is a pseudo-ternary plot in which Mg, Cu, and Y are varied and Ni, Gd, Zn, and Ag are held constant at the values indicated above the diagram. This study [17] determined an optimum ratio between Gd and Y elements in a compositional mapping given by Mg 65 Cu 7.5 Ni 7.5 Ag 5 Zn 5 Gd 10−x Y x . As Gd and Y are both similarly large elements, any variations in GFA must be attributed to thermodynamic, as opposed to topological or kinetic, criteria.…”

Structure relaxation of Mg65Cu25Gd10 metallic glass and its effect on strength

“…Recently, it has been reported that Mg 65 Cu 25 Gd 10 alloy [7] exhibits a significantly improved GFA so that metallic glass rods with diameter of 8 mm were obtained by copper mold casting. Moreover, based on Mg 65 Cu 25 Gd 10 , a series of new Mg-based amorphous alloys with higher GFA have been developed [8][9][10][11][12][13][14] . So Mg 65 Cu 25 Gd 10 has become the foundation for studying other Mg-based metallic glasses, however, the understanding of Mg 65 Cu 25 Gd 10 is very limited.…”