About this Abstract |
| Meeting |
2027 TMS Annual Meeting & Exhibition
|
| Symposium
|
Interstitial–Metal Interactions: The Outsized Role of Small Atoms
|
| Presentation Title |
Hydrogen charging at room temperature to reduce dislocations in steel with residual stresses |
| Author(s) |
David F. Bahr, Jia-Huei Tien |
| On-Site Speaker (Planned) |
David F. Bahr |
| Abstract Scope |
Solute interstitial hydrogen interacts with dislocation structures that are formed during surface deformation in quench and tempered steel to reduce dislocation density. When the deformation leads to a residual stress gradient, the increase in dislocation mobility due to the solute can lead to dislocation annihilation. By using electrochemical cathodic charging to introduce solute hydrogen, we show that the dislocation density can be lowered at room temperature, effectively annealing the material at ambient conditions, validating these changes with X-ray diffraction, TEM, and electron channeling contrast imaging. After this room temperature anneal the hydrogen can be removed via resting at room temperature or a mild bake cycle. This provides a viable method to reduce detrimental tensile stresses formed during machining without altering the bulk microstructure of the steel. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Characterization, Environmental Effects, Mechanical Properties |