Biomedical TiNbZrTaSi alloys designed by d-electron alloy design theory

Abstract We report on the formation of ultrafine-grained (Ti 69.71 Nb 23.72 Zr 4.83 Ta 1.74 ) 100 −  x Si x (at.%, x  = 0, 2 and 5) alloys designed by d -electron alloy design theory and fabricated by spark plasma sintering of nanocomposite powder precursor. The designed and fabricated alloys exhibit a high yield and fracture strength of 1296 MPa and 3263 MPa along with an ultra-large fracture strain of 65% under compression. Meanwhile, they display low elastic modulus of 37–48 GPa. The high-performance titanium alloys without toxic elements show high potential for application as biomaterials.