|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Influence of Sn on Martensitic Phase Transformation and Super-elasticity of Beta Ti Alloys
||Song Cai, J E Schaffer
|On-Site Speaker (Planned)
Understanding the effect of alloy elements on microstructures and phase transformation of Ti alloys is important in developing Ni-free Ti alloys with high super-elasticity. Such behavior is highly demanded by medical device industries such as minimally invasive device designers. In our previous studies, Fe and Cr were found to improve the stress-induced phase transformation and super-elastic behavior of Ti-Nb based alloys, but not enough to prevent the room temperature aging, which jeopardizes their applications. In this study, the influence of Sn is investigated. A series of Ti-Nb based alloys with Sn content from 1-5at% are melted and processed to a wire form with a diameter of 0.5mm. Phase stability and super-elasticity are evaluated by DSC, cyclic tensile testing and in-situ synchrotron X-ray diffraction. Evolution of phase transformation and changes of lattice parameters of different phases by Sn are studied, providing useful information to alloy design and materials manufacturing.
||Planned: Supplemental Proceedings volume