|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Environmentally Assisted Cracking: Theory and Practice
||L-67: The Influence of Global Slip Behavior on Hydrogen Environment-Assisted Cracking in Monel K-500
||Zachary Harris, James Burns
|On-Site Speaker (Planned)
Lot-to-lot variations in metallurgical features and hydrogen-metal interactions have been shown to influence HEAC susceptibility in peak-aged Monel K-500. Evaluating the effect of global slip morphology on HEAC behavior in Monel K-500 will enable further understanding of observed lot-dependent behavior and provide insight into the general interaction between the bulk deformation behavior and the plasticity developed in the near-crack region during HEAC. The effect of global slip on HEAC metrics is evaluated through slow-rising stress intensity testing in both inert and aggressive (marine) environments. Systematically varied heat treatments are used to produce precipitate (γ’) sizes that result in distinct global slip behavior. High-fidelity characterization of localized plasticity/dislocation structures are conducted via high-resolution electron backscatter diffraction and transmission electron microscopy of specimens lifted from the crack wake using focused-ion beam techniques. Results are evaluated in the context of existing micromechanical models and the overarching contribution of localized plasticity is discussed.
||Planned: Supplemental Proceedings volume