Effect of Al, Sn, Zr, Mo on mechanical properties of α titanium alloys at room temperature and cryogenic temperature

The effect of elements, such as Al, Sn, Zr, Mo, on the mechanical behavior and deformation mechanisms was studied in present paper. The mechanical properties were measured at room temperature and -196°C(in liquid nitrogen), and the fracture and deformation modes were also discussed. The results show that the alloys with above element have both high strength and satisfied ductility at cryogenic temperature, and the elements contribute to the ductility as the following order: Zr > Sn > Al (Mo). Twinning become more active at low temperature and was affected by alloying elements.