A New Beta Titanium Alloy of Low Elastic Modulus

A new beta titanium alloy Ti-8Mo-8Zr-4.5Sn-2Mn was designed,and melted by non-consumable electric arc furnace in argon atmosphere.The metallographic microstructure,the crystal texture,hardness and elastic modulus were characterized by microscope,X-ray diffractometer and nano-hardness Tester.The results show that the alloy contains dendritic structure and equiaxed grain structure, exists alloying element segregation and has the elastic modulus with 41.4GPa.Meanwhile,comparing to TMA(Ti-11.5Mo-6Zr-4.5Sn),the effects of the electron concentration e/a,the combined number Bo and the d electron orbital energy level Md on the elastic modulus were investigated.The conclusions was obtained that the low of Bo and Md and the increase of e/a are beneficial to reduce the elastic modulus of alloy.