| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmentally Assisted Cracking: Theory and Practice
|
| Presentation Title |
The Roles of Intrinsic Material Factors and Hydrogen-Metal Interactions in the Increased Hydrogen Environmentally Assisted Cracking Susceptibility of Additively Manufactured 17-4 PH Stainless Steel |
| Author(s) |
Lauren Singer, Zachary Harris, James T. Burns, John R. Scully |
| On-Site Speaker (Planned) |
John R. Scully |
| Abstract Scope |
The role of hydrogen (H)-metal interactions and material factors in the enhanced H environment-assisted cracking susceptibility of additively manufactured (AM) 17-4 PH stainless steel via laser powder bed fusion method was examined via comparison of the effective hydrogen diffusivity, trap binding energy, diffusible H content, as well as the critical hydrogen concentration for stage II crack propagation in NaCl under cathodic polarization. A comparison made was between wrought 17-4 PH and AM 17-4 PH in the peak-aged and over-aged tempers with matched strength and ductility. Specifically, results demonstrate that the critical hydrogen concentration required for intergranular and transgranular crack advance in the wrought alloys is notably decreased in AM relative to wrought 17-4 PH while the effective H diffusivity is increased. Both attributes are examined in detail. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Environmental Effects, Additive Manufacturing, Mechanical Properties |