Mechanical properties of Zr56.2Ti13.8Nb5.0Cu6.9Ni5.6Be12.5 ductile phase reinforced bulk metallic glass composite

Tuning plasticity of in-situ dendrite metallic glass composites via the dendrite-volume-fraction-dependent shear banding

“…4a shows the uniaxial compressive stress-strain curves. The A8 alloy (referred to as the composite containing 8% of dendrites, see Table 1) fractures catastrophically at the strength of 1780 ± 35 MPa without detectable plasticity, similar to its glass matrix [33]. decreases linearly with the increase in f d , which can be reasonably described by the rule of mixtures [13,32]: [33,36].…”

“…According to the pseudo-ternary phase diagram with apexes of Zr, Ti+Nb, and Be 9 Cu 5 Ni 4 [33], as shown in Fig. 1, six alloys were designed along the line of (Zr 75 Ti 15 Nb 10 ) 100−y (Be 50 Cu 27.5 Ni 22.5 ) y with y=20, 26, 27, 29, 30 and 32.…”

“…1, six alloys were designed along the line of (Zr 75 Ti 15 Nb 10 ) 100−y (Be 50 Cu 27.5 Ni 22.5 ) y with y=20, 26, 27, 29, 30 and 32. It was shown that Be, Cu, and Ni are distributed preferentially in the glass matrix, and the composites with different volume fractions of the dendrites can be obtained via changing the value, 'y′ [33]. The master ingots of the six composites were prepared by melting the mixture of high-purity Zr, Ti, Nb, Cu, Ni, and Be elements ( > 99.9 wt%) under a Ti-gettered argon atmosphere.…”

“…The A8 alloy (referred to as the composite containing 8% of dendrites, see Table 1) fractures catastrophically at the strength of 1780 ± 35 MPa without detectable plasticity, similar to its glass matrix [33]. decreases linearly with the increase in f d , which can be reasonably described by the rule of mixtures [13,32]: [33,36]. As opposed to the yield strengths, a nonlinear enhancement of the plasticity was observed [13,32], showing the percolation transition, i.e., the onset of macroscopic plasticity [37,38], around the critical volume fraction 21%.…”

Microstructural Change by Friction Stir Processing in Zr-Al-Cu-Ni Bulk Metallic Glass

“…1) Although extensive research on the deformation of BMG at room temperature has been conducted, the relationships between shear bands and the mechanical properties of BMG have been paid a lot of attention in late years. [2][3][4][5][6][7][8][9] In general, BMG hardly shows plasticity at room temperature, because the formation of shear bands and its propagation take place at almost the same time. The limited plastic deformation capacity of BMG was caused by localized deformation process.…”