Papers by Keyword: β-Structures

Abstract: A Ti-25Ta-25Nb β-type titanium alloy was subjected to thermo-mechanical processing and testing with the aim to observe the twinning deformation mechanism. Data concerning the evolution of twinning versus stress was obtained by SEM and micromechanical testing. Mechanical properties of the investigated alloy were also evaluated

Abstract: The design of novel Ti-based alloys for biomedical load-bearing implant application, such as hip or knee prostheses, aims at providing structural materials which are characterized by good corrosion stability in the human body, high fatigue resistance, high strength-to-weight ratio, good ductility, low elastic modulus, excellent wear resistance, low cytotoxicity and a negligible tendency to provoke allergic reactions. Low elastic modulus is required to be close to that of a human bone, in order to transfer the adequate mechanical stress to the surrounding bone. The Young’s modulus of biomaterials is desired to be equal to that of cortical bone because if the Young’s modulus of biomaterials is much greater than that of cortical bone, bone resorption occurs. Investigated samples were subjected to mechanical tests, having provided these mechanical properties: ultimate tensile strength (σ_UTS), yield strength (σ_YS), elongation to fracture (ε_f) and elastic modulus (E).