|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Ultrafine Grained Materials IX
||Mechanical Properties of Pure Titanium and a Ti-45Nb Alloy: A Comparative Study
||Bernhard Völker, Nikolaus Jäger, Ajit Panigrahi, Michael Zehetbauer, Reinhard Pippan, Anton Hohenwarter
|On-Site Speaker (Planned)
Titanium alloys are heavily researched as implant materials due to their exceptional biocompatibility. Especially beta-Ti alloys are gaining more interest, because of their relatively low Young’s modulus which reduces mechanical shielding effects. A further improvement of the mechanical properties of such alloys can be expected by severe plastic deformation (SPD). In this investigation an overview of the microstructure and mechanical properties of a beta-Ti alloy (Ti45Nb) subjected to high pressure torsion (HPT) will be presented and compared to HPT-processed pure titanium as a reference material. In the case of pure titanium HPT, besides the strong grain refinement, also leads to an omega phase-formation, whereas the beta-Ti alloy remains a nanostructured basic cubic centered single-phase material. In the light of these SPD-microstructures important mechanical properties such as strength and ductility will be discussed. A special focus will be given on the significant aspect of damage tolerance pursued by fracture toughness measurements.