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Meeting MS&T22: Materials Science & Technology
Symposium Advances in Ferrous Metallurgy
Presentation Title In-situ Laser Confocal Microscopic Analysis of Phase Transformations in Cr-Ni-Mo and Cr-Mo High-strength Steels Coupled with Dilatometric Study
Author(s) Viraj Ashok Athavale, Rogerio Antao Cardoso, Katelyn Kiser, Mario F. Buchely, Laura N. Bartlett, Ronald J. O'Malley
On-Site Speaker (Planned) Viraj Ashok Athavale
Abstract Scope Consequent to interdendritic segregation during solidification, chemical composition gradients in steels affect localized variations in phase transformation temperatures. Commercial software used to predict transformation temperatures does not necessarily account for such alterations. In this study, the predicted transformation temperatures were studied experimentally, utilizing high-temperature Laser Scanning Confocal Microscopy (LSCM) and Quenching Deformation Dilatometer (QDL) for two steel grades. Upon heating the specimens sufficiently above liquidus temperature, their melting-solidification behavior and solid-state phase transformation were recorded and analyzed. Secondary dendrite arm spacing (SDAS) measurements allowed for assessing the degree of interdendritic segregation. Dilatometric studies produced the austenite-to-martensite transformation temperature under different cooling rates. The findings yielded by both approaches were compared with a view to overlaying data to thermodynamic models and exploring the constituent variations in phase transformation temperature stemming from interdendritic segregation.

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Rapid CCT Predictor for Low Alloys Steels and its Application to Compositionally Heterogeneous Material
Adapting HSLA-100 to Thick-Section Forgings
Characterization of Ductility Limiting Precipitation at High Temperatures in HSLA steels
Dielectric Behavior of Steel and Its Application in Structural Self-powering
Effect of Leaching Process Variables on the Reaction Kinetics of Pyrite Using Surface Response Methodology
Effects of Cyclic Intercritical Annealing on Retained Austenite in Medium Manganese Steels
Evaluation of Martensite Transformation Temperatures Using Magnetometry
F-4: Simulation Study on the Influence of Magnesia-carbon Material Embedded in Electrode on the Current Distribution and Temperature Distribution
F-5: Obtaining a Dual-phase Steel by Hot Rolling from a Chemically Modified Commercial Steel
Flow Optimization for Steel Refining Process in an EAF
Further Analysis of the Relationship between Precipitate Formation and a Loss of Hot Ductility in Two Microalloyed Steels
In-situ Laser Confocal Microscopic Analysis of Phase Transformations in Cr-Ni-Mo and Cr-Mo High-strength Steels Coupled with Dilatometric Study
Mechanical Behavior and Plasticity Mechanisms of Ultrahigh Strength-high Ductility 1 GPa Low Density Austenitic Steel with Ordered Precipitation Strengthening Phase
Modelling of Accelerated Runout Table Cooling of Thicker Gauge Steel Products
Relationship between Hardness Distribution and Microstructure Formation Process during Martensitic Transformation in Steels
Rigorous, Machine-Learning based Classification of Steel Microstructures Using EBSD
Stereological Analysis for Microstructure Quantification in Advanced High Strength Steels
Structure-property Relationship of High Mn Steel and Bi-metallic Hammers for Clinker Crusher Application

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