About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
The Effect of Hydrogen Concentration on the Cyclic Deformation Behavior of Pure Single and Polycrystalline Nickel |
| Author(s) |
Mohammad Imroz Alam, Leonidas Zisis, Joseph A. Ronevich, Michael D. Sangid, Zachary D. Harris |
| On-Site Speaker (Planned) |
Mohammad Imroz Alam |
| Abstract Scope |
Hydrogen is well known to induce premature failure in metals, yet the fundamental understanding of hydrogen–metal interactions remain limited, particularly at higher hydrogen concentrations. Most existing studies on cyclic deformation behavior have focused on hydrogen concentrations below 1000 atomic parts per million (appm), leaving the influence of higher concentrations largely unexplored. This study investigates the cyclic deformation behavior of single crystal and polycrystalline pure nickel under hydrogen concentrations of 0 - 4000 appm. The cyclic stress-strain response is assessed using fully reversed, strain amplitude-controlled loading to systematically evaluate the evolution of macroscopic stress components—namely total stress, effective stress, and backstress—as a function of hydrogen concentration. The associated microstructural evolution is then characterized using X -ray diffraction, electron backscattered diffraction and transmission electron microscopy. The findings aim to provide new insights into hydrogen-enhanced localized plasticity and cyclic hardening mechanisms across a broader hydrogen concentration regime. |
| Proceedings Inclusion? |
Planned: |