Abstract
A Ti–Ni–Cu–Zr bulk metallic glass-forming alloy was modified by adding various percents of Ta for improving plasticity. The modified Ti-base alloys are investigated in terms of microstructure, mechanical properties and fracture behavior. (Ti 26Zr 12Cu 53Ni 9) 0.7(Ti 80Ta 20) 0.3 contains Ti 2Ni particles and α′ + γ-TiCu matrix, and exhibits high yield strength and very high Young's modulus, but zero plasticity. (Ti 26Zr 12Cu 53Ni 9) 0.5(Ti 80Ta 20) 0.5 contains dendritic β-Ti(Ta) solid solution and α′ + γ-TiCu matrix, and exhibits high yield strength, high Young's modulus and distinct plasticity, showing significant plasticity-improvement after adding 10 at.% Ta into the alloy.
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