| About this Abstract |
| Meeting |
MS&T24: Materials Science & Technology
|
| Symposium
|
Emergent Materials under Extremes and Decisive In Situ Characterizations
|
| Presentation Title |
Microstructure and Temperature Dependencies of Grain Boundary Plastic Deformation Localization in IN718 via Multi-modal Characterization |
| Author(s) |
Raghul Asok Kumar, Dhruv Anjaria, Amlan Das, Reilly Knox, Jean-Charles Stinville, Darren Pagan |
| On-Site Speaker (Planned) |
Raghul Asok Kumar |
| Abstract Scope |
Plastic deformation across grains in polycrystalline materials is often localized and influenced by the grain boundary configuration, with the intensity and distribution of localization events depending on temperature. Experimental understanding of this localization behavior has been limited by the characterization methods employed and by the multiscale nature of the problem. However, new multi-modal approaches can aid the investigation of the temperature dependence of plastic deformation localization at the microscale. Here, a method has been developed to register both local and non-local microstructural characteristics and deformation fields from 2D electron microscopy and 3D high-energy X-ray diffraction microscopy (HEDM) data, which is then applied to polycrystalline IN718 alloy. For each grain, the microstructural characteristics are mapped to its strain distribution obtained at the surface from high-resolution digital image correlation and in 3D by HEDM. Evolving correlations between microstructural features and plastic deformation localization with decreasing temperature are presented. |