Fabrication of an advanced hip prosthetic stem using β Ti-33.6Nb-4Sn alloy

TL;DRAbstract

Fabrication of an advanced hip prosthetic stem using Ti- 33.6Nb-4Sn alloyThis study used severe cold rolling followed by cold swaging of Ti-33.6%Nb-4%Snrods to form a characteristic fiber structure composed of stress-induced " martensite with <010> texture and a phase with <101> texture, resulting in a material with a low Young's modulus of 40 GPa.The high tensile strength of 1270 MPa and fatigue strength of 850 MPa were attained by heat treatment at 673 K for 5 h through fine precipitation in the fiber structure.A new method of fabricating a high-performance hip prosthetic stem was investigated based on the low Young's modulus and high strength obtained.After fabricating the stem by cold rolling, cold swaging, cold die-forging and machining, its neck region was given higher strength through local heat treatment, while the low Young's modulus remained almost unchanged in a distal portion of the stem.When a stem tip in the distal part was heat treated at 423 K, reverse " transformation

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