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Meeting 2017 TMS Annual Meeting & Exhibition
Symposium Advanced High-Strength Steels
Presentation Title High Strength Nb-bearing Medium Mn Steel for Warm Stamping
Author(s) Jae-Hoon Nam, Jeongho Han, Young-Kook Lee
On-Site Speaker (Planned) Jae-Hoon Nam
Abstract Scope Hot stamping is a technology to produce automobile parts (e.g. A,B-pillar, roof rail, bumper, etc.) that require high strength and high formability. Applications of hot stamping are expanding rapidly because of its advantages of precise dimension, high rigidity and complex geometry of the formed parts. However, hot stamping shows limitations in process; it needs high temperature for forming (over A<SUB>3 </SUB>temperature), rapid quenching for hard martensite phase at room temperature, and additional tempering for better toughness. Recently, the medium Mn steel with 3-10 wt.% Mn have been actively studied due to its excellent tensile strength (< 1.2 GPa) and ductility (< 40%). In present study, we studied the Nb-bearing medium Mn steel for the warm stamping process. The low A<SUB>3 </SUB>temperature and martensitic transformation occurring even during slow cooling of medium Mn steel could solve the disadvantages of present hot stamping, and Nb precipitation produces additional hardening.
Proceedings Inclusion? Planned: Supplemental Proceedings volume

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Ab-initio Investigation of the Interaction of Hydrogen with Carbides in Advanced High-strength Steels
Ab Initio Calculations of Solute Effects on the Lattice Parameters and Elastic Constants of Fe Phases
Ab Initio Guided Design of High Strength Steels: Where Do We Stand?
Advanced High Strength Steel Based on Vanadium Carbide Precipitation
An Interface Controlled Transformation Model Predicting the Kinetics for Isothermal Bainite Formation in Medium Mn Steels
Analysis of the Aging Behavior and Orientation Relationships with Respect to β-Mn Phase in Austenite-based Low-density Steel
Appication of Nano-sized Precipiation in Strengthening Low Alloy Dual Phase Steel
Atomic Scale Study of Boron Non-equilibrium Segregation and Precipitation at Prior Austenite Grain Boundary in High Strength Steels
Austenite Formation along Dislocations in Medium Manganese Steels
Computational Design of Metastable Retained Austenite in Advanced High Strength Steels
Data Science Approaches for Predicting Fatigue Strength of Steels
Deformation-Induced Martensite: A Thermodynamic Study
Design of a Core-Shell Structure Carbide for Enhancing Toughness of UHS Steels
Effect of B2 Morphology on the Mechanical Properties of Dispersion Strengthened Lightweight Steels
Effect of Interfacial Mn Partitioning on Carbon Partitioning and Interface Migration during Quenching and Partitioning
Effect of Microstructure on Formability and Micro Fracture Mechanism in DP Steel for Automotive Outer Panel
Effect of Retained Austenite Transformation Holding Time and Temperature on the Microstructural Development and Properties of a Medium Mn Third Generation Advanced High Strength Steel
Effect of Starting Microstructure and Intercritical Annealing Parameters on Mechanical Properties of a Medium-Mn Third-generation Advanced High Strength Steel
Effects of Aluminum Addition on Warm Ductility and Microstructure in Mn-rich Steels
Effects of Solid Solution Treatment on the Microstructure and Mechanical Properties in the Ultra-high Strength Steel Strengthened by Nanoscale Particles
Experimental Determination of Magnitude of Shear of Stacking Faults, Twins and Alpha’-martensite in TRIP/TWIP Steels
Extraordinary Crack Resistance in Metastable Multi-phase Nanolaminated Steels
F-10: Effects of Deformation on Hydrogen Solubility and Diffusion in Al-alloyed Fe-Mn Alloys
F-11: Effects of Microstructure on the Strain Rate Sensitivity of Advanced Steels
F-12: Excellent Mechanical Properties Balance of Fine 0.1C-2Si-5Mn Fresh Martensite and Ferrite+Austenite Steels
F-13: In-situ Synchrotron X-ray Diffraction Study on the Micromechanical Behavior of Medium Manganese Transformation-induced Plasticity Steel at Low Temperature
F-14: Influence of Asymmetrical Cold Rolling on Crystallographic Texture of σ-TRIP Steels
F-16: Mechanical Evaluation of Hypo and Hypereutectic Chromium Carbide Hard Facing Steel
F-17: Microstructure-based Modeling of Tensile Properties in High-strength Pipeline Steels
F-18: Microstructure and Mechanical Properties of GMAW Welds in TWIP Steels
F-19: Modeling the Interplay between Transformation and Plasticity in Low-carbon Steels. A Micro-level Constitutive Model / RVE Approach
F-1: 3D Micromechanical Modeling of Dual Phase Steels Using the Representative Volume Element Method and Response Surface Methodology: Parametric Study
F-20: Modelling of Hot Deformation Behavior during Ingot Breakdown Process of Medium Carbon Low Alloy Steel Using Hansel-Spittel Approach
F-21: Multi-stage Martensitic Phase Transformation in Steel/Copper Nanolaminates: An In Situ X-ray Study
F-22: Orientation Dependence of Microstructure and Texture Evolution during Tensile Testing of a TWIP Stainless Steel
F-23: Review of Bake Hardening Mechanisms of Ultra Fine Grained and Coarse Grained Low Carbon Steel Sheets
F-24: Role of Initial Microstructure in Micro Constituents of Dual Phase Steels
F-26: Tension-compression Asymmetry and Relationships to the Microstructure in Advanced High Strength Steels
F-27: Nano-sized Intermetallic Kappa Phase Strengthening in Al-alloyed Steels for Automotive Applications
F-2: Atom Probe Tomography Studies of Complex Oxide Formations in Oxide Dispersion Strengthened Steels
F-3: Carbide Banding Formation and Prevention in 52100 Bearing Steels
F-4: Cold Deformation Behaviour of Ultrafine-grained Dual Phase Steel Manufactured with Use of a Dynamic Austenite-ferrite Transformation
F-5: Controlling Springback in Dual-Phase Steels
F-6: Design of Ultra-high-strength Fe-Cr-Mn-Ni-N-C Stainless Steels with Enhanced Ductilities
F-7: Effect of Austenite Grain Size on Deformed Microstructures and Tensile Properties of Austenitic Fe-24.5Mn-4Cr-0.45C Alloy
F-8: Effect of Initial Microstructure on the Grain Size of “Warm Deformed” 4140 Steel
F-9: Effect of Plastic Deformation at Elevated Temperatures on the Hardenebility of Boron Steels
High Speed Tensile Test with Infrared Thermography and Microstructure Analysis on a High Mn TWIP Steel
High Strain Rate Deformation of High-Mn and Medium-Mn TWIP-TRIP Steel
High Strength Nb-bearing Medium Mn Steel for Warm Stamping
Hot Stamping Process for Steel Parts with Higher Ductility
Hydrogen Solubility near Surfaces and Interfaces
Influence of Cooling and Strain Rate on the Hot Ductility Behavior of High Manganese Steels within the System Fe-Mn-C
Influence of Microalloying Elements Ti and Nb in Solid Solution and as Precipitates during Annealing of Advanced High-strength Steels
Influence of the Initial Microstructure on the Reverse Transformation Kinetics and Microstructural Evolution in TRIP-assisted Steel
Influences of Thermomechanical Treatments on the Microstructure Evolution and Mechanical Properties of Nano-precipitates Strengthened Steels
Interaction of VC-Precipitation and Phase Transformation Kinetics in Mo-containing Nano-steels
Interface Dominated Process in Modern Steels
Interface Guided Design of High-strength Steels: A Dream Coming True?
Is Twinning Important for Twinning-induced Plasticity Steels?
Low Alloy High Strength Martensitic Nitrogen Steel
Microstructural Evolution and Mechanical Behavior of Medium Mn Steels Intercritical Annealed from Different Starting Structure
Microstructure and Mechanical Properties of a 0.2C-5Mn TRIP Steel after Continuous Intercritical Annealing
Microstructure and Mechanical Properties of Nano/ultra-fine Structured High Strength Steels for High Temperature Structural Applications
Molecular Dynamics Simulations of the Interaction of Helium Clusters with Grain Boundaries and Dislocations bcc Iron
New Insights in the Atomic Interface Structure of Kappa Carbides in High-Mn Steels
New Insights into H Trapping and Diffusion in Steel Microstructures Obtained from Atomistic Simulations
New Law to Describe Plastic Anisotropy in BCC Metals
Observation of Low Cycle Fatigue Dislocation Structures in a TWIP, TRIP and MBIB Steel, Using Electron Channelling Contrast Imaging (ECCI)
Parameter-free Finite-temperature Computations of Stacking Fault Energies for Magnetic Materials
Paving the Bridge from Ab Initio to Atomistic Modeling of Advanced High-strength Steels
Process Window for Heavy Plastic Deformation of a Ferritic-austenitic Steel
Properties and Applications of Industrially Processed Hot Rolled High-manganese TWIP Steels
Quantitative Analysis of the Precipitate Coarsening in HSLA Steels
Related Mechanisms in Athermal and Deformation-induced Martensitic Transformation in Austenitic Fe-Cr-Ni Alloys
Relationship between Impact Toughness, Prior Austenite Grain Boundaries and Microstructural Morphology in Medium Mn Steel
Segregation Engineering in Medium Manganese Steels
Strain Path Dependence of Retained Austenite Mechanical Stability in a Medium Manganese Steel Stamping
Tempering Reactions in Martensitic Stainless Steels Studied by Dilatometry and Correlative Magnetic Saturation Measurements
The Development and Application of a Thermodynamic Database for Low-density Steels
The Role of Copper in Microstructures and Mechanical Properties of Laser-welded Fe-19Ni-3Mo-1.5Ti Maraging Steel Joint
Thermodynamic-mechanical Modeling of Deformation-induced Martensitic Transformation Aided by In-situ Magnetic Measurements during Tensile Tests
Three Dimensional Atom Probe and First-principles Studies on Spinodal Decomposition of Cr in a High Strength Maraging Stainless Steel
Ultrahigh Strength and Excellent Ductility Achieved by Grain Refinement in Low-carbon High-manganese Steels
In-situ Synchrotron X-ray Diffraction Investigation on Strain Hardening Behavior of Fe-17Mn-1.5Al-0.3C Steel

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