About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Neutron and X-ray Scattering in Materials Science
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Presentation Title |
Operando Neutron Diffraction Reveals Insights into Transient Phases and Residual Stresses during Directed Energy Deposition Additive Manufacturing |
Author(s) |
Chris Fancher, Kyle Saleeby, Ke An, James Haley, Guru Madireddy, Thomas Feldhausen, Yousub Lee, Dunji Yu, Clay Leach, Alex Plotkowski |
On-Site Speaker (Planned) |
Chris Fancher |
Abstract Scope |
Additive Manufacturing (AM), often called 3D printing, offers the unique opportunity to transform how materials are consolidated into bulk 3D structures. The localized melt strategies in metal AM introduce non-equilibrium thermal conditions that can affect the microstructure and phase evolution in as-fabricated parts. ORNL has developed an AM sample environment to study transient phases and bulk stress evolution during metal DED using the engineering diffractometer VULCAN-X at the Spallation Neutron Source. This paper will present the system's system capabilities by capturing the phase evolution during deposition of low-temperature transition and mild steels in operando. Differences in the temperature dependences of phase transitions significantly impact as-fabricated residual strains and stresses. Measured operando diffraction data provide critical information needed for material model validation mechanics, including the use of diffraction data as a bulk temperature probe. |
Proceedings Inclusion? |
Planned: |
Keywords |
Additive Manufacturing, Characterization, |