About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
Presentation Title |
Effect of Hydrogen on the Deformation of Austenitic Stainless Steels: A Stress Orientation Dependent Contribution? |
Author(s) |
Fernando Daniel Leon-Cazares, Samuel Parry, Brian Kagay, Xiaowang Zhou, Coleman Alleman, Joseph Ronevich, Chris San Marchi |
On-Site Speaker (Planned) |
Fernando Daniel Leon-Cazares |
Abstract Scope |
Austenitic stainless steels are widely used in high-pressure hydrogen storage and delivery systems. Internal hydrogen is known to harden and embrittle these alloys, but its interactions with dislocations under varied stress states are not fully understood. This study investigates a potential anisotropic yield behavior of alloy 316L promoted by hydrogen, in which its contribution to the critical resolved shear stress has been reported to depend on stress orientation. Tension and compression tests are performed on hydrogen-precharged single crystals along multiple crystallographic directions to assess the roles of non-Schmid stress components. Molecular dynamics simulations are employed to investigate the effects of interstitial hydrogen, vacancies and hydrogen-vacancy complexes on the critical resolved shear stress for varied stress orientations, and a finite element crystal plasticity model is used to capture the emergent deformation behaviors. Hydrogen is shown to affect the deformation microstructure in varied ways, but deviations from Schmid’s law are not reproducible. |
Proceedings Inclusion? |
Planned: |
Keywords |
Environmental Effects, Mechanical Properties, Other |