|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Advanced Characterization Techniques for Quantifying and Modeling Deformation Mechanisms
||High Resolution Strain Measurements in a Polycrystalline Superalloy during Deformation at Intermediate Temperature
||J.C. Stinville, M.P. Echlin, W.C. Lenthe, F. Bridier, M. Soare, S. Ismonov, P. Bocher, T.M. Pollock
|On-Site Speaker (Planned)
Damage mechanisms in polycrystalline metallic alloys involve the accumulation of plastic strain at the sub-grain level. Measurements of the heterogeneous strain field that results from the complex grain boundary network present in engineering alloys are combined with microstructural and orientation information to determine the deformation mechanisms present at intermediate temperatures. Digital image correlation (DIC) has been extended to higher resolution to measure in-plane strains at the sub-grain scale and below, where plastic strain localization can be directly correlated with physical slip bands. Strain fields were measured in a René 88DT polycrystalline nickel-base superalloy to assess the deformation processes under monotonic and cyclic loading at room and intermediate temperature. Significant temperature effects were observed in the local strain field and are related to a change in deformation mechanisms. A new comparative approach is presented to correlate microstructure sensitive modeling results from crystal plasticity with high-resolution DIC measurements.
||Planned: Supplemental Proceedings volume