| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advanced Characterization Techniques for Quantifying and Modeling Deformation
|
| Presentation Title |
Assessing the Variation in Localized Deformation During Hydrogen Environment-assisted Cracking in Peak-aged Monel K-500 |
| Author(s) |
Zachary D. Harris, Adam W Thompson, James T. Burns |
| On-Site Speaker (Planned) |
Zachary D. Harris |
| Abstract Scope |
Recent results indicate that the hydrogen environment-assisted cracking (HEAC) resistance of precipitation-hardened Monel K-500 heat-treated to different aging conditions is strongly influenced by the propensity for slip localization. However, mechanistically linking this slip localization behavior with enhanced HEAC susceptibility is complicated by a lack of experiments directly examining the deformation pertinent to the HEAC fracture path. In this study, the deformation proximate to the fracture surface of a peak-aged Monel K-500 specimen that failed due to HEAC is systematically evaluated at known stress intensity (K) values using EBSD to assess local texture, HR-EBSD to evaluate geometrically necessary dislocation (GND) density distributions, and FIB/BF-STEM to directly image deformation structures. Results from this analysis demonstrate clear variations in dislocation patterning and GND density distribution for different grain orientations, despite experiencing similar mechanical driving forces (K), thereby providing insights into the interplay between microstructure, loading, and environment in determining HEAC susceptibility. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |