| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
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| Symposium
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Phase Transformations and Microstructural Evolution
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| Presentation Title |
Annealing behavior of additive manufactured 304L using in-situ EBSD |
| Author(s) |
Yuheng Nie, Marie Charpagne, Jack Donoghue, Albert Smith, Katerina Christofidou |
| On-Site Speaker (Planned) |
Yuheng Nie |
| Abstract Scope |
Additive manufactured 304L stainless steel solidifies following the ferrite-to-austenite pathway, leading to a unique microstructure that exhibits intense grain boundary serration due to ferrite pinning and globular twin domains forming via two distinct mechanisms: (1) the encounter of pairs of austenite variants formed from a common ferrite orientation with Kurdjumov–Sachs orientation relationship; (2) icosahedral short-range-ordering(ISRO)-induced nucleation of twin-related austenite grains. Here, we use a heating stage to investigate the annealing behavior of this highly metastable microstructure, in-situ within a SEM. The instrument combines backscatter imaging and high-speed EBSD for dynamic characterization of phase transformations, static recrystallization, grain boundary migration, and grain boundary character distribution, as a function of annealing time. The findings will be discussed in terms of grain boundary mobility, Zener pinning, strain induced boundary migration and recrystallization mechanisms.
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| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Iron and Steel |