About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Materials
|
| Presentation Title |
Effect of post-processing heat treatment on the hydrogen-environment assisted cracking behavior of binder-jet printed 17-4PH stainless steel |
| Author(s) |
Borna Rafiei, Adam Thompson, Zachary Harris |
| On-Site Speaker (Planned) |
Zachary Harris |
| Abstract Scope |
It is well established that additively manufactured (AM) alloys can exhibit unique microstructures relative to incumbent, conventionally manufactured (CM) materials. For example, while CM 17-4PH exhibits a broadly martensitic structure, binder jet printed (BJP) 17-4PH has a complex microstructure composed of porosity, retained γ-austenite, δ-ferrite and carbides. Such microstructural differences suggest that the hydrogen environment-assisted cracking (HEAC) behavior of BJP 17-4PH will likely differ for that of CM 17-4PH, but studies to-date assess HEAC in BJP 17-4PH are highly limited. The objective of this study is to evaluate the HEAC behavior of BJP 17-4PH in two temper conditions (H900 and H1025) after undergoing hot isostatic press and solution annealing treatments. Fracture mechanics-based testing is conducted on 17-4PH specimens fully immersed in 0.6 M NaCl and exposed to cathodic polarization. Results of this evaluation are then compared to existing data on similarly heat-treated CM and other AM 17-4PH results. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Characterization |