About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
|
Symposium
|
Deformation Mechanisms, Microstructure Evolution, and Mechanical Properties of Nanoscale Materials
|
Presentation Title |
Hydrogen Effects on Mechanical Deformation, Dislocation Density, and Phase Separation in 4130 Steel |
Author(s) |
Zachary Buck, Matthew Connolly , May Martin, Damian Lauria, Jason Killgore, Peter Bradley, Yan Chen, Ke An, Andrew Slifka |
On-Site Speaker (Planned) |
Zachary Buck |
Abstract Scope |
Interrupted tensile tests were performed on AISI 4130 steel in air and under hydrogen pressures ranging from 260 psi to 2600 psi. Investigation by neutron diffraction of the deformed specimens reveal a hydrogen-dependent partitioning of ferrite and martensite phases as a function of applied strain. Dislocation densities of the two individual phases were extracted by analyzing the Bragg peak broadening using a Williamson-Hall approach. A phase transformation from predominantly martensitic steel to ferritic steel was also observed as a function of applied strain. Lastly, scanning Kelvin probe force microscopy (SKPFM) was used to measure hydrogen in 4130 steel. Results from SKPFM suggest a slower rate of hydrogen desorption from martensite grains compared to ferrite grains. |
Proceedings Inclusion? |
Planned: |
Keywords |
Iron and Steel, Phase Transformations, Mechanical Properties |