About this Abstract |
Meeting |
2025 TMS Annual Meeting & Exhibition
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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 |
Microstructural evolutions during multi-pass thermomechanical processing of austenitic stainless steels with a high proportion of annealing twins |
Author(s) |
Hugo Latuner, Julien Favre, Aurelien Helstroffer, Gregory Inacio Da Rosa, Emeric Plancher, Pierre Joly, Guillaume Kermouche, Christophe Desrayaud |
On-Site Speaker (Planned) |
Hugo Latuner |
Abstract Scope |
Multi-pass hot forging is used to produce large components in austenitic stainless steels (ASSs) for Generation III and III+ nuclear reactors. Multi-pass thermomechanical processing of FCC low stacking-fault energy (SFE) materials, such as ASSs, is conducive to the formation of a high proportion of annealing twins with low reciprocal densities of coinciding site lattice (CSL) Σ. The primary objective of this study is to characterize the microstructural evolution occurring in multi-pass thermomechanical processing, with a particular emphasis on the dynamic and post-dynamic recrystallization mechanisms. To this end, an experimental simulation of multi-pass hot forging was performed by uniaxial hot compression, under different thermomechanical conditions. Through SEM-EBSD microstructural analysis, it was found that the proportion of Σ 3 and Σ 9 interfaces is greater than 75%. The relationship between this elevated fraction of annealing twins and the microstructural evolutions during processing is discussed. |
Proceedings Inclusion? |
Planned: |
Keywords |
Characterization, Iron and Steel, Nuclear Materials |