| About this Abstract |
| Meeting |
2022 TMS Annual Meeting & Exhibition
|
| Symposium
|
Additive Manufacturing Fatigue and Fracture: Developing Predictive Capabilities
|
| Presentation Title |
Environmental Cracking Behavior of Additively Manufactured 17-4PH Stainless Steel |
| Author(s) |
James Burns, Trevor Shoemaker |
| On-Site Speaker (Planned) |
James Burns |
| Abstract Scope |
Additively manufactured materials intended for use in fracture critical applications must be vetted for environmentally affected crack growth resistance. The current study utilizes fracture mechanics testing to quantify the stress corrosion cracking (da/dt versus stress intensity) behavior of traditionally manufactured 17-4PH stainless steels and its additively manufactured equivalent. The AM samples were subjected to various post-processing steps (HIP and thermal treatments to achieve hardened conditions) to test the AM materials in conditions that would enable direct replacement of traditional components. Testing is performed in full immersion chloride solutions at a variety of electrochemical potentials for 17-4PH. Initial results indicate an enhanced susceptibility for AM materials in both the H900 and H1000 conditions, with AM exhibiting a change in damage mode at modestly severe conditions. The data are interpreted in the context of a micro-mechanical hydrogen embrittlement damage model where microstructural variations are identified and linked to the relevant model parameter. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Iron and Steel, Environmental Effects |