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Meeting MS&T22: Materials Science & Technology
Symposium Advances in Ferrous Metallurgy
Presentation Title Mechanical Behavior and Plasticity Mechanisms of Ultrahigh Strength-high Ductility 1 GPa Low Density Austenitic Steel with Ordered Precipitation Strengthening Phase
Author(s) Craig Guerrero, Devesh K. Misra
On-Site Speaker (Planned) Craig Guerrero
Abstract Scope We describe here the mechanical behavior and plasticity mechanisms of Fe-27Mn-9Al-1C austenitic steel. The experimental steel was characterized by ultimate tensile strength and elongation to fracture of 1125 MPa and 30.8%, respectively. Plastic deformation was accommodated by pronounced planar dislocation slip and characterized by a single planar dislocation glide at low strain and multiple planar slip at high strain. Electron microscopy studies indicated that some of the uniformly distributed ordered kappa carbide precipitates of size ~5–7 nm were sheared by planar glide dislocations during deformation. The planar dislocation glide phenomenon is attributed to the superposition of sheared ordered phase and short range ordering (SRO), which can lead to glide plane softening. Dynamic slip band refinement and shearing of precipitates led to constant strain hardening of austenitic steel. Annealing twin boundaries acted as dislocation source to generate dislocations during deformation, which facilitated sub-division of slip bands and suppressing strain localization.

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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