About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
|
Symposium
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Microstructural Evolution and Material Properties due to Manufacturing Processes: A Symposium in Honor of Anthony Rollett
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Presentation Title |
Characterizations of additive manufacturing metals via in-situ X-ray diffraction |
Author(s) |
Seunghee Oh, Andrew C. Chuang, Robert Suter, Anthony Rollett |
On-Site Speaker (Planned) |
Seunghee Oh |
Abstract Scope |
In-situ X-ray diffraction is a non-destructive technique widely used for investigating continuously changing behaviors. Technological advancements in X-ray sources and detectors have continually improved acquisition rates and data quality. Our experimental setup enables the capture of transient lattice changes during rapid processes, such as additive manufacturing, previously inaccessible with conventional techniques. Utilizing this in-situ X-ray diffraction setup, we detailed the formation of martensite in Ti-6Al-4V during rapid cooling post-laser melting. Additionally, heating experiments temporally resolved the decomposition of martensite in Ti-6Al-4V during laser heating. The resolved behaviors presented sequential changes: dislocation relaxation accompanied by changes in crystal anisotropy and phase transformation. We also investigated the compositional and thermomechanical behaviors in Ni alloy 718 during laser processing, analyzing diffraction data with a simple data analytics method. Some findings suggest possibilities that challenge conventional knowledge about martensite in Ti-6Al-4V and Ni alloy 718, offering new insights into these materials' behaviors. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Additive Manufacturing, Phase Transformations |