Effects of Fe addition on glass-forming ability and mechanical properties of Ti–Zr–Be bulk metallic glass
Abstract The influence of Fe addition on the glass-forming ability (GFA) and mechanical properties in Ti 41 Z r25 Be 34 −  x Fe x ( x  = 0, 2, 4, 5, 6, 8, 10 at.%) alloys was studied. It has been found that the glass forming-ability and mechanical property of the Ti–Zr–Be alloys could be significantly improved by addition of Fe element. Among the present alloys, the Ti 41 Zr 25 Be 28 Fe 6 glassy alloy shows the largest supercooled liquid range Δ T x (Δ T x  = 107 K), and a large critical size of 8 mm for fabricating BMGs by copper mold casting method. The yield strength, ultimate strength and plastic strain are dramatically enhanced from 1755, 1914 MPa and 2.9% for Ti 41 Zr 25 Be 34 glassy alloy to 1964 MPa, 2268 MPa and 11.2% for Ti 41 Zr 25 Be 28 Fe 6 glassy alloy, respectively. Especially, the specific strength (yield strength/density) is 4.02 × 10 5  Nm/kg, greatly larger than that of most other BMGs. The experimental results show that Fe addition is an effective way for improving the glass-forming ability and mechanical properties of Ti–Zr–Be glassy alloy.