|About this Abstract
||2022 TMS Annual Meeting & Exhibition
||Advances in Titanium Technology
||Critical comparison of estimation of critical resolved shear stress from slip line trace analysis and spherical indentation protocols and Bayesian learning techniques for Ti 6Al-2Sn-4Zr-2Mo and Ti 6Al-2Sn-4Zr-6Mo alloys
||Soumya Mohan, Arunima Banerjee, Andrew Castillo, Natalia Millan Espitia, Biswaranjan Dash, Zhuowen Zhao, Shanoob Balachandran, Dipankar Banerjee, Surya R. Kalidindi
|On-Site Speaker (Planned)
Understanding plasticity of titanium alloys with bimodal microstructures is crucial due to their applications to aero-engine parts. Estimation of critical parameters, specifically Critical Resolved Shear Strength (CRSS), is needed to inform crystal plasticity models. The accuracy and reliability of two different experimental methods of measuring CRSS values for the primary- α phase are compared critically in Ti6242 and Ti6246 alloys. The two methods compared were the spherical indentation stress-strain protocols (paired with Bayesian learning techniques) and slip line trace analysis. The slip resistance or CRSS values for indentation protocols for Ti6242 are 221 ± 18 MPa, 342 ± 49 MPa, 748 ± 135 MPa and 1150±188 MPa; and for Ti6246 are 189±4MPa, 359±9MPa, 820±27MPa and 1087±26MPa for prism a ⃗, basal a ⃗, pyramidal a ⃗, pyramidal (c ⃗+ a ⃗) slip, respectively. Slip ratios from indentation agreed well with the range of ratios calculated from slip line trace analysis.
||Characterization, Mechanical Properties, Titanium