About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interstitial–Metal Interactions: The Outsized Role of Small Atoms
|
| Presentation Title |
The effect of hydrogen concentration on the monotonic and cyclic deformation behavior of <001> oriented pure nickel single crystal |
| Author(s) |
Mohammad Imroz Alam, Pierangeli Rodriguez, Zachary D. Harris |
| On-Site Speaker (Planned) |
Mohammad Imroz Alam |
| Abstract Scope |
The objective of this study is to evaluate the effect of hydrogen concentration on the monotonic and cyclic plastic deformation behavior of single crystal pure nickel. Displacement-controlled tensile testing and strain amplitude-controlled cyclic experiments are performed on <001>-oriented single crystals of pure nickel containing hydrogen concentrations of 0, 2000, and 4000 atomic parts per million (appm). Monotonic experiments reveal a significant influence of hydrogen concentration on both the yield strength and work hardening behavior, with both notably increasing as the hydrogen content is increased. Similarly, strain amplitude-controlled testing demonstrates that increasing hydrogen content induces more significant cyclic hardening, indicating an important role of hydrogen on backstress evolution. These mechanical behavior evaluations are then complemented by characterization of the mesoscale deformation via electron backscatter diffraction. Results of these analyses are then discussed in the context of existing theories for hydrogen-assisted degradation as well as their extension to describe polycrystalline material behavior. |
| Proceedings Inclusion? |
Planned: |