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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Real Time Imaging
Presentation Title In-situ Visualization of Retrograde Melting Phenomenon During Solidification of Boron-bearing Steels
Author(s) Hongbin Yin
On-Site Speaker (Planned) Hongbin Yin
Abstract Scope It is well known that the addition of boron to steels can cause difficulties during continuous casting, including surface cracks and internal cracks of the cast products. In severe cases, breakout and slab breakage can occur. Studies on the effect of boron on Fe-B alloys pseudo-binary phase diagrams at various carbon levels found that small addition of boron introduces the possibility of so-called retrograde melting, i.e., upon cooling, the steel initially completely solidifies and then remelts at segregated interdendritic regions and grain boundaries at temperatures approaching 1200 oC. This phenomenon is the primary cause of casting difficulties of B-bearing products. To confirm the theoretical work on the finding of retrograde melting phenomenon, Confocal Scanning Laser Microscope studies were carried out for “in-situ” observation. These studies revealed the existence of the retrograde melting phenomenon in commercial B-bearing steels at temperatures below 1200 oC. The present paper summarizes the results.
Proceedings Inclusion? Planned:

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

4D Microstructural Evolution of Bismuth (Bi) Phase during Solidification of Sn-58Bi Solder
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Energy Absorption Properties of Open-Cell Rhombic Dodecahedron Cellular Lattice Structures Under Shock Compression
Estimation of Interfacial Strain Response for a Bi-material Strip in Tensile and Shear Loading Using THz-TDS
High-Temperature Wetting of Calcium Alloys and Molten Salts
In-situ Monitoring and Post Operando Analysis of Additively Manufacturing Lunar Regolith Simulants Parts
In-situ TEM Study of Rapidly Solidifed AlCuLi Based Alloys
In-situ Visualization of Retrograde Melting Phenomenon During Solidification of Boron-bearing Steels
L-9: In-situ Magnetic Computed Tomography for Additive Manufacturing
Machine Learning for In-situ Detection of Local Heat Accumulation in Additive Manufacturing
Mapping the Melt Pool Variability in L-PBF Additive Manufacturing by High-Speed Imaging
Microstructure Evolution during Laser-based Powder Bed Fusion Studied by Operando X-ray Radiography
Prediction of Laser Absorptivity from Synchrotron X-ray Images Using Deep Convolutional Neural Networks
Real-time Plasmon-Enhanced Colorimetric Imaging
Real Time Imaging of Laser Melting and Re-Solidification
Recent Advances in Ultrafast Real-time Imaging of Sonoprocessing Advanced Materials
Study of Fracture Behaviors of Epoxy-Alumina Composite Using Mechanical Testing Coupled with Micro-CT
The Influence of Temperature on Strength: Are Concentrated BCC Alloys Different than Elements and Dilute Alloys?
Thermal Stability of fcc-bcc Nanolaminates Containing 3D Interfaces
Three-dimensional Assessment of Strain Localization at the Sub-grain Level of a Ni-based Superalloy at Low and High Temperature Using Laser Scanning Confocal Microscopy
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