Effect of Hot Rolling Temperature on Microstructure and Mechanical Properties of Ti-Zr-V-Nb-Si Alloy
Light weight high entropy alloy(TiZrV0.5Nb0.5)99.4Si0.6 with a density of 6.1 g/cm3 was prepared by vacuum arc melting.The effects of different hot-rolling temperatures(900℃,1000℃and 1100℃)on the microst-ructure and mechanical properties were investigated.The results show that after rolling,the strength and elongation are both improved.The tensile strength and elongation of the alloy with a rolling temperature of 900℃reached 1164.5 MPa and 14.7%,which was best and can surpass 13.9%and 950%than that of the as-cast alloy respectively.However,with the further increase of hot-rolling temperature,the grain size increases and the mechanical properties decline.The excellent mechanical properties of the alloy with a rolling temperature of 900℃are the result of dislocation,solid solution,second phase and grain refinement.
High entropy alloyMicrostructureMechanical propertyStrengthening mechanismVacu-um arc melting
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