Effect of alloyed elements Ti, Zr on the property and microstructure of Mo alloy

Abstract

Mo-Zr and Mo-Ti alloy were fabricated by powder metallurgy process, the effect of the adding forms and addition amount of Zr, Ti on the tensile property and microstructure of the alloy were studied. The results indicate that the addition of the alloyed element Zr, Ti obliviously enhances the mechanical property of molybdenum. The tensile strength of Mo-Zr alloy added pure Zr is higher than that of Mo-Zr alloy added ZrH(2) powder. The highest value of tensile strength is achieved when the addition amount of Zr is 0.1wt%. The minority of Zr solves in to the Mo matrix while the majority forms ZrO(2) particles with oxygen in the alloy. Mo-Ti alloy possesses higher tensile strength when the alloyed element Ti is added in the form of TiH(2) powder, which is of highest tensile strength when the addition amount of TiH(2) is 0.8wt%. One part of Ti solves into the Mo matrix and the others forms Mo(x)Ti(y)O(z) composite oxide particles with Mo and oxygen in the alloy