The Influence of Different Mass Fractions of MO Elements on Powder Metallurgy Properties
In order to investigate the influence mechanism of Mo element on powder metallurgy properties,Ti6Al4V2CrxMo alloy samples containing different mass fractions of Mo element were prepared by cold isostatic pressing and vacuum sintering methods.The powder metallurgy properties were analyzed from the aspects of density,mechanical properties,and phase composition.The results show that the application of Mo element helps to improve the density of titanium alloy.The density of titanium alloy prepared by 280 MPa cold isostatic pressing and 1 300 ℃ vacuum sintering is about 98％,and the most prominent is when w(Mo)is 1.5％.The alloy structure is related to the amount of Mo added.When the amount of w(Mo)added is below 1.5％and above 1.5％,the alloy has equiaxed structure and basket structure,respectively.The Mo element has an impact on the mechanical properties of the alloy.As the content increases,its tensile strength,elongation,and microhardness show a trend of first increasing and then decreasing,indicating that a w(Mo)addition of 1.5％can effectively improve the overall performance of the alloy.
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