Effect of Rare Earth Y on the Structure and Properties of TiZrNb Medium Entropy Alloys
In this paper,three medium entropy alloys,TiZrNb,TiZrNbY0.25 and TiZrNbY0.5,were prepared by vacuum induction melting and casting,and the effects of rare earth element Y on the structure,mechanical properties and corrosion resistance of TiZrNb alloys were investigated.The results showed that with the increase of Y content,the grain structure of the alloys was refined and the composition was more homogeneous,but a small amount of Y-rich,Zr-rich and Ti4Nb phases were formed between the dendrites.The addition of rare earth Y improved the compressive yield strength of TiZrNb alloy,but the TiZrNbY0.5 alloy precipitated more Y-rich phases of poor strength between the dendrites,and its compressive yield strength was lower than that of TiZrNbY0.25 alloy.In addition,the Y element improved the corrosion resistance of TiZrNb alloy,and the corrosion current density of TiZrNbY0.25 alloy in 1 mol/L HCl solution was only 4.71×10-7 A/cm2.
万方数据
维普
