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Meeting 2022 TMS Annual Meeting & Exhibition
Symposium Phase Transformations and Microstructural Evolution
Presentation Title Structural Evolution by Grain Refinement and Relaxation upon Heating of an Additive-manufactured 316L Stainless Steel
Author(s) Jae-Kyung Han, Xiaojing Liu, Yusuke Onuki, Yulia O. Kuzminova, Stanislav Evlashin, Klaus-Dieter Liss, Megumi Kawasaki
On-Site Speaker (Planned) Megumi Kawasaki
Abstract Scope In this report, structural evolution through nanostrcuturing is examined by a series of X-ray diffraction analysis and the structural relaxation behavior is examined by in-situ neutron diffraction under heating on the nanostructured additive-manufactured 316L stainless steel. Significant structural changes occur in a very early stage of nanostructuring and it is attributed to severe lattice distortion by the excess of dislocations and defects introduced by the post-printing processing. The sequential information on the structure evolution during in-situ neutron diffraction analysis upon heating provides the texture development, linear thermal lattice expansion, and stress relaxation behaviors of the nanocrystalline steel with increasing temperature up to 1300K, while these structural changes are in contrast to the steel without nanostructuring. Together with the hardness measurements after heating, the results of structural evolution are interpreted to describe microstructural recovery, recrystallization and grain growth behaviors and the thermal stability of the nanocrystalline stainless steel.
Proceedings Inclusion? Planned:
Keywords Additive Manufacturing, Phase Transformations, Iron and Steel


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Atomistic Modeling of Phase Stability and Transformations due to the Presence of Precipitates in High and Medium Entropy Alloys
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Cementite Decomposition in 100Cr6 Bearing Steel during High-pressure Torsion: Influence of Composition, Size, Morphology and Matrix Hardness
Cluster Evolution and Phase Transformation in Austenitic High-Cr Stainless Steel: A Comparison of Thin Film and Bulk Geometries
Coarsening Behavior of Hierarchical B2 Precipitates in a High Entropy Alloy
Coupled Effects of Shear and Temperature on Intermixing in Cu-Ni Multilayers
Decoupling of Strain and Temperature Effects on Microstructural Evolution during High Shear Strain Deformation
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O-25: Contribution of the Electronic Entropy to Some Congruent and Allotropic Phase Transformations
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O-29: Leveraging Solid-state Phase Transformations to Tailor Residual Stress in Additively Manufactured Metal Components
O-30: Microstructural and Mechanical Property of Ti-6Al-4V/STS 304 Dissimilar Joints by Diffusion Bonding Using Hierarchical Multilayers Structure
O-31: Modeling Phase Transformation and Tensile Properties of Micro-alloyed Structural Steels for Fire Resistance
O-32: Phase Evolution of Laser Melted Single Tracks of 316L
O-33: Phase Transformations and Microstructural Evolution
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O-36: The Influence of Ru Addition on the Precipitation Behavior of Topologically Close-packed Phase in the Ni-based Superalloy
O-37: The Microstructural Evolution of Ag-39.9at%Cu Eutectic Alloys under Different Cooling Rates
O-38: Thermodynamics of Elinvar Behavior
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