科研之友
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摘要
By alloying and thermo-mechanical treatment, a novel alpha' martensite Ti-10Nb-2Mo-4Sn (wt%) alloy with ultralow elastic modulus and high strength was prepared. Coarse alpha' martensite plates with internal twins are formed in the solution treated alloy. Upon a severe cold rolling deformation, the alloy exhibits fine microstructure consisting of nano-sized alpha' and dislocation tangles, resulting in a remarkable increase in strength. Meanwhile, the cold rolled alloy exhibits an ultralow elastic modulus of 41 GPa, which is lower than that of most biomedical beta-type Ti alloys containing a considerable amount of expensive Nb and Ta. Therefore, the alpha' martensite Ti-10Nb-2Mo-4Sn alloy has a high potential not only for biomedical applications, but also for industrial applications, due to its low elastic modulus, high strength and low cost.
