|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation
||Strain Accommodation Mechanisms in the Near Alpha Ti-6Al-2Sn-4Zr-2Mo Alloy Studied Using Experiments and Simulations
||Samuel Hemery, Azdine Naït-Ali, Mikael Gueguen, Olga Smerdova, Christophe Tromas
|On-Site Speaker (Planned)
In spite of decades long research focused on deformation in Ti alloys, the understanding of the early slip activity regime is still incomplete. In this context, performance prediction under cyclic loadings such as experienced in-service is difficult. In this context, characterization of operating deformation mechanisms was carried out using in-situ SEM tensile tests combined with electron back-scattered diffraction. Additional information about the slip character was obtained using atomic force microscopy. A specific attention was paid on the sequential activation of the different strain accommodation mechanisms including slip and twinning, and the relation to room temperature creep / stress relaxation. A CRSS dataset for the different slip and twinning modes observed is then derived and validated using fast-Fourier transforms based simulations. New insights into the fatigue and dwell-fatigue behaviors are finally discussed.
||Titanium, Characterization, Mechanical Properties