About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Additive Manufacturing Fatigue and Fracture: Effects of Surface Roughness, Residual Stress, and Environment
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Presentation Title |
Comparison of Hydrogen-Metal Interactions in Additively Manufactured and Wrought 17-4PH via Thermal Desorption Spectroscopy Methods |
Author(s) |
Zachary D. Harris, Alfredo Zafra, Lauren Singer, Emilio Martinez-Paneda, John Scully, James Burns |
On-Site Speaker (Planned) |
Zachary D. Harris |
Abstract Scope |
Understanding hydrogen-metal interactions in additively manufactured (AM) materials is critical for the safe implementation of AM in components where environment-assisted cracking (EAC) is a pertinent failure mode. In this study, the hydrogen uptake, diffusivity, and trapping behavior of wrought and selectively laser melted (SLM) 17-4PH steel after a range of post-build thermal treatments (involving various combinations of solution annealing, hot isostatic press, and aging to the H900 or H1025 temper) is assessed using thermal desorption spectroscopy. Results demonstrate that each SLM 17-4PH condition consistently exhibits a lower hydrogen content and faster hydrogen diffusivity than comparable wrought material. Interestingly, only minor differences in hydrogen trapping behavior are observed between comparable wrought and SLM 17-4PH. These results are coupled with EAC measurements on the tested alloys to identify the factors responsible for the observed increase in EAC kinetics for SLM 17-4PH, focusing specifically on the role of microstructural differences. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Environmental Effects, Iron and Steel |