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Meeting 2018 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Optical Imaging
Presentation Title In-situ Observation of Sulfide Formation during Solidification in Fe-Cr-Ni-Mn-S Alloys
Author(s) Kazuo Nakama
On-Site Speaker (Planned) Kazuo Nakama
Abstract Scope Sulfide formation in Fe-Cr-Ni-Mn-S alloys was observed in-situ by Confocal Scanning Laser Microscope (CSLM). It is known that solidification paths of Fe-Cr-Ni alloys vary with the amounts of Cr and Ni contents. Sulfide formation during solidification is also expected to be influenced by a solidification path that the base metal proceeds. A CSLM equipped with a gold-image furnace was employed to directly observe the difference of evolution and morphology of sulfide with solidification paths. When a sample alloy was rich in Cr, it solidified in the primary ferrite and following sulfide evolution occurred in viscous state in sulfur-enriched liquid phase. When an alloy was rich in Ni, it solidified as the primary austenite and sulfides appeared ahead of the dendrite fronts in a eutectic metal-sulfide structure. These difference in sulfide formation phenomena resulted in several types of sulfide morphology after solidification.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

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Agglomeration Behavior of Non-metallic Inclusions in Liquid High Carbon Steel
Agglomeration of Non-metallic Inclusions at the Liquid Steel/Ar Gas Interface: A Summary of In-situ Observation Experiments and a Theoretical Study
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Determining Metastable Phase Transformation Temperature between Al4Sm-beta and Al4Sm-gamma
Direct Observation of Iron Solidification under Molten Slag
High-temperature Microscopy Incorporating Differential Thermal Analysis
In-situ Microscopic Study of Natural Hematite over Repeated Reduction-oxidation Gas Exposures
In-situ Observation of Reduction or Oxidation of Molten CaO-FeOx-SiO2 Oxides at 1573 K
In-situ Observation of Sulfide Formation during Solidification in Fe-Cr-Ni-Mn-S Alloys
In-situ Studies of Selective Oxidation in Advanced High Strength Steels
In Situ Observation of Dissolution of Oxide Inclusions in Steelmaking Slags
Insitu Tensile Performance of P91 Steel in CO2 Environment, Utilizing Small Samples and a Confocal Microscope
Introduction to Advanced Real Time Optical Imaging
Investigation of Integrated Recycling Waste Heat and Slag Resources Using Single Hot Thermocouple Technique
Localized Concentration of Metal Cations of Steelmaking Slags and its Visualization Using Confocal Laser Scanning Microscope
Mass Transfer in High-temperature Laser Confocal Microscopy
Observations of Ferrite Formation and Growth in Inclusion-engineered Low Alloy Steels during In-situ Heat Treatments
Real-time Observation of Solution Growth Interface of SiC Using Alloy Solvent
Real Time Observation of High Temperature Metallurgical Phenomenon at the University of Leuven
Thermal Imaging Furnace for the Investigation of the Molten State
Using High-temperature Confocal Scanning Laser Microscopy to Study Transient Phenomena: Swelling and Spontaneous Emulsification
Wettability of Graphite-alumina Composites against Molten CaO-SiO2-Al2O3-MgO Slags
Wetting, Spreading and Penetrating Behavior of Slags in Contact with Refactory Ceramics

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