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Meeting Materials Science & Technology 2014
Symposium Advanced Steel Metallurgy: Products and Processing
Presentation Title Atom Probe Compositional Analysis of Nanoscale Carbide and Carbo-nitride Precipitates in Nb-Ti Micro-alloyed Steels
Author(s) Monica Kapoor, Ron O'Malley, Gregory B Thompson
On-Site Speaker (Planned) Monica Kapoor
Abstract Scope Composition of complex carbide and carbo-nitride precipitates in Ti-Nb micro-alloyed 80-ksi (0.06 wt. % Nb; 0.06 wt. % Ti) and 100-ksi (0.03 wt. % Nb; 0.12 wt. % Ti) steels was studied using atom probe tomography. Fine (~2 nm) and coarse (~8 nm) NbTiC precipitates were identified in the 100 ksi steel with the Fe content decreasing with increasing precipitate size. Both steels had coarse NbTiCN precipitates (~ 80 nm) having ~7 at. % and ~30 at. % Nb in the precipitates for the 100 ksi and 80 ksi steels respectively. Star-shaped TiC precipitates and parallel rows of interphase NbTiC clusters on and near grain boundaries were also identified in the 100 ksi steel. In the 80 ksi steels, uniformly distributed disk-shaped and spherical NbTiC clusters were observed along dislocations. The composition and phase stability of these precipitates are discussed in terms of Thermo-Calc solution thermodynamic modeling.
Proceedings Inclusion? Definite: A CD-only volume


Influence of Stored Energy in Cold Rolled Sheet on the Formation of Austenite during the Subsequent Intercritical Annealing of V-bearing Dual-phase Steels
A Comparison of Different Measurement Methods to Evaluate Strain-induced Martensite Formation in a Metastable Austenitic Stainless Steel
A Composition Formula for Maraging Stainless Steels
A New Dispersion Strengthening Mechanism in Ferritic Alloys
A Study on the Strain Ageing Behavior of Steel Plates for Offshore Structure
A Uniaxial Tension/Compression Test to Measure the Bauschinger Effect in High-strength Steel Sheet
Advances in Automated SEM/EDS Technology for the Characterization of Non-metallic Inclusions in Steel
An Insight into Steelmaking Slag Structure from Phosphorus Distribution
Atom Probe Compositional Analysis of Nanoscale Carbide and Carbo-nitride Precipitates in Nb-Ti Micro-alloyed Steels
Austenite Evolution during Limited Roughing of HTP Steel
Austenite Formation and Decomposition in Medium Mn Steels
Back-stress Contribution to the Work Hardening of Dual-phase Steels
Bonding Studies between Fracture Toughened Adhesives and Advanced High Strength Steels
CFD Analysis of Hotmetal Desulfurization Process for Improved Mixing in a Torpedo Vessel
Characterization of Hot Deformation Behavior of Low Carbon Steel Using Processing Maps, Constitutive Equations and Zener-hollomon Parameter
Characterization of L80 Steel Microstructure Using Ultrasonic Measurements
Characterizing the Deformation of a Quenched and Partitioned Steel Sheet
Comparision of Hot Test with Dross and Glossy Cast Iron Cooling Stave
Concrete Reinforcement Bar Manufacturing Technologies and their Effect on Rebar Performance in Structural Durability
Creation of Light, Ductile, Ultrastrong Steels through Modification of B2-IMC (Intermetallic Compound) Morphology in Austenite Matrix
Cu and Mn Effect on Intermetallic Compounds Precipitation in PREN 50 Grade Duplex Stainless Steels
Dephosphorization Model for a Continuous DRI-EAF Process
Development of a Non-linear Ultrasonics and SEM-EBSD based Model to Predict the Remaining Life of Creep Damage Prone High Cr,Ni Steels Based Hydrogen Reformer Tubes
Development of a Novel RH Degassing Process with Powder Injection through the Nozzles of Snorkel
Development of a Virtual Blast Furnace Training System
Different Routes for the Development of Ferrite-pearlite Microstructures Suitable for Spheroidization during Soft Annealing Treatments
Dynamic Transformation of Austenite to Ferrite during the Torsion Simulation of Strip Rolling
Effect of B2O3 on Viscosity and Structure of Lime-alumina Based Mold Slag
Effect of Cooling Rate and Grain Size on the Formation of Thermal Martensite in TWIP Steel through Dialtometer Test
Effect of Tempering on Microstructure and Mechanical Properties of Quenched and Tempered 4340 Steel
Effect of Tempering Temperature and Cooling Rate after Tempering on Mechanical and Microstructural Properties of Heavy Forged Components
Effect of the Granularity of Different Metamorphic Degree Coal on Combustion Characteristics
Effect of Water Temperature on the Cooling Rate, Mcirostructure and Mechanical Properties of a C-Mn Containing Steel Sheet
Effective Inclusion Treatment with Solid Core Pure Calcium Wire
Effects of the Microstructure on the Mechanical Properties of Fully Pearlitic Eutectoid Steels
Fate and Effect of Steel Sheet Surface Oxides on Galvanizing Bath Management
Flash Bainite ~ Cold Stamping 1550MPa B-pillars and Zero-T/1T Bends
Growth Model of Scales (FeO, Fe3O4, Fe2O3, Fe2SiO4) of Carbon Steel
Hall-petch Behavior of Fe-Co-V Soft Magnetic Alloy Barstock
High Temperature Flow Stress Modeling of Microalloyed Steels
High Temperature Young's Modulus of a Seamless Pipe Steel
Hot Ductility Comparison of Percent Reduction in Area and Strain Energy for the Continuous Casting of Nb-microalloyed Steels
Improvement of EW Toughness in High Strength Line Pipes through GleebleŽ Simulations
Improving Mechanical Properties in an Ultrahigh Carbon Steel through Heat Treatment
In-situ Observation of Acicular Ferrite Formation Using HT-LSCM: Possibilities, Challenges and Influencing Factors
In-situ SAXS Studies on Precipitates Evolution in Cold Rolled Steel Strip
In-situ Study and Simulation of The Influence of Microstructure and Heating Rate on Phase Transformation in a Dual Phase AHSS
Increased Use of Natural Gas in Blast Furnace Iron-making
Influence of Small Deviations in Steel Chemical Composition on Hardenability
Influence of Steel Surface Condition on Selective Oxidation during Galvanizing
Intercritical Austempering of Austempered Ductile Cast Iron (ADI)
Isothermal Heat Treatment Effects on the Microstructure of Sub-micron Grain 9310 Steel
Kinetics Model on Modification of MgOAl2O3 Inclusions
Kinetics Study on Carbothermic Reduction of Composite Briquettes Made of Iron-bearing Dust and Sludge
Mechanism of Solid-state Reaction between MnO-SiO2-FeO Oxides and Fe-Mn-Si Alloys by Heat Treatment at 1473K
Method for Testing the Fracture Splittability of Forged Steel Connecting Rods
Microstructural and Computer Modeling Study of the Annealing Behavior of Vanadium Bearing HSLA Steel after Cold Rolling
Microstructural Effects on Mechanical Properties in High Strength Low Alloy Martensite Steel
New AHSS in Three Distinct Classes
Numerical Analysis of Flow Behavior in Tuyere and Raceway of Oxygen Blast Furnace under Double Oxy-coal Lances Operation
Numerical Analysis of Grade Mixing and Inclusion Motion in Steelmaking Tundish during Ladle Change Process
On the Occurrence of Carbide Precipitation during Quenching & Partitioning Heat Treatments
Optimization of Oxygen Lance with Four Nozzles in 80t Converter by Numerical Simulation
Pearlite Growth Rate in Ternary Steels
Phase Transformations and Crash Performance of Mo-Nb Bearing Press Hardening Steels
Physical Simulation Study on Optimization of Nozzle Structure for Round Mould with M-EMS
Process Modeling and Simulation of EAF with Electromagnetic Stirring
Quantitative Analysis of Effect of Microstructure on Fatigue Damage Evolution in Advanced Martensite Dominated Dual Phase Steels
Quantitative Approach to Select a Heat Treater Using CQI-9 System
Quenching and Partitioning Process Development to Replace Hot Stamping of High Strength Automotive Steel
Recent Developments in Continuous Annealing Process of Advanced High Strength Steels at ThyssenKrupp Steel Europe
Reduction of Calcium Oxide in the Slag by Aluminum and Inclusion Modification
Role of Heating Conditions On Microcrack Formation In Zinc Coated 22MnB5
Springback Prediction: Simplified Model
Stretch-flangeability of 0.2%C-1.5%Si-(1.5-5)%Mn TRIP-aided Martensitic Steels
Study of Friction during Cold Rolling of Steel in a Four-high Reversible Mill
Study on Mechanical Properties and Wear Resistance of Cr-Mo Steels in Different Heat Treatment Conditions
Superstrengthening Phenomenon (An Overview)
Synthesis of Fe-C Alloys by Mechanical Alloying
The Effect of Cold-work and Temperature on the Microstructural Evolution of an Alumina-forming Austenitic Stainless Steel
The Effect of Composition and Heat Treatment on Retained Austenite in a High Toughness Secondary Hardening Steel
The Effect of Silicon in Early Stages of Tempering of Medium Carbon Steels
The Microstructure and Properties of Ultra-high Strength Wear Resistance Steel Plate by a Novel Energy Conservation Process
The Research of Influence Alloying Elements on Processes Structure Formation in Stamp Steel
The Water Model Experiment and Verification for Optimization of 150t Ladle Bottom Blowing Argon
Thermodynamic Analysis on the Behavior of Titanium in Productions Process of 95CrMo Hollow Steel
Thermodynamic and Kinetic Aspects of the Effect of Alloying Elements on Cementite and Carbide Formation in High-strength Steels
Thermomechanical Processing of Structural Steels with Dilute Nb Additions
To Study the Formation of ε and α΄ Martensite in High Manganese Steels Via Deformation and Transformation Mode and Its Correlation with Mechanical Properties
Understanding the Precipitation Behaviour of Nb micro-alloyed Steels during Thermomechanical Processing
X-ray Micro Tomography Study of High Strength Cast Iron for Heavy-duty Engine Applications

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