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Meeting MS&T22: Materials Science & Technology
Symposium Advances in Ferrous Metallurgy
Presentation Title Effects of Cyclic Intercritical Annealing on Retained Austenite in Medium Manganese Steels
Author(s) Dawn Van Iderstine, Matthew S. Cagle, Shiraz Mujahid, YubRaj Paudel, Sven C. Vogel, Zackery B. McClelland, Robert D. Moser, Haitham El Kadiri, Hongjoo Rhee
On-Site Speaker (Planned) Dawn Van Iderstine
Abstract Scope Intercritically annealed medium manganese steels are a promising third-generation advanced high-strength steel candidate. Through manganese enrichment of austenite, large austenite fractions (>30%) can be retained at room temperature, allowing for transformation-induced plasticity during deformation to prolong work hardening through high strains. Prior studies have established strong mechanical property dependence on the amount and stability of this retained austenite. However, austenite distribution – which is key given the role of ductile austenite in mitigating strain incompatibility between hard ferrite grains – has received less attention. To promote widespread austenite distribution, a novel cyclic intercritical annealing has been designed to encourage austenite nucleation while limiting its growth. Preliminary experimentation, including tensile testing, neutron diffraction, and microstructure analysis, indicates that the cyclic heat treatment promotes nucleation and efficient stabilization of austenite. Additionally, the effects of the thermal cycle on austenite formation, stability, and distribution are analyzed and compared against equivalent isothermal annealing.

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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