|About this Abstract
||2018 TMS Annual Meeting & Exhibition
||Phase Transformations and Microstructural Evolution
||Control of β Phase Stability and Deformation Induced Martensitic Transformation in a Near-α titanium Alloy
||Fan Meng, Gregory Olson
|On-Site Speaker (Planned)
A novel near-α titanium alloy Ti-8111Fe for structural applications is computationally designed based on the commercial alloy Ti-5111. In order to obtain peak transformation toughening effects, the β phase composition is adjusted to have the characteristic M<SUB>S</SUB><SUP>σ</SUP>(ct) at the crack tip stress state around room temperature. Phase composition and fraction evolution of Ti-8111Fe annealed at 865<SUP>o</SUP>C are experimentally evaluated. The results show that morphology and size of β phase also affect its composition. Based on the CALPHAD method, a model is developed to better predict the β phase composition variation and further control the β phase stability. Deformation induced martensitic transformation from β to α” is validated by tensile tests.
||Planned: Supplemental Proceedings volume