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Meeting MS&T23: Materials Science & Technology
Symposium Advances in Understanding of Martensite in Steels II
Presentation Title Phase Field Study of Tempering in Maraging Steels
Author(s) Rajeev Ahluwalia, Jakub Mikula, Yingzhi Zheng, Robert Laskowski, Kewu Bai, Guglielmo Vastola, Yongwei Zhang
On-Site Speaker (Planned) Rajeev Ahluwalia
Abstract Scope The high strength of maraging steels arises due to the growth of precipitates when the initial martensite state is heat treated. In addition, heat treatment also results in the concurrent growth of reversed austenite phase by a diffusional process. In this study, we develop a phase field model to study the decomposition of martensite by taking into account the growth of precipitates as well as reverted austenite. The model takes into account phase transformation-induced elastic and plastic deformations. We model 18Ni M300 maraging steel, using a ternary Fe-Ni-Ti model that is parameterized by using the thermodynamic and kinetic data of the alloy. The simulation data is used to estimate the variation of yield strength as a function of temperature and ageing time. The model also brings out the importance of reverted austenite phase on the evolution of the strength during the heat treatment at higher temperatures.


Achieving 1.4 GPa Tensile Strength with Good Ductility in a Novel Low-alloy Low-carbon Martensite Steel
Effect of Thermomechanical Strategy and Ni-Mo Alloying on High Strength Quenched and Tempered Thick Plates
Evolution of Dislocation Structure during Plastic Deformation in Lath Martensite of Low-Carbon Steel Observed by ECCI
Excess Solute Carbon and Retained Tetragonality in Autotempered and Tempered Fe-C Lath Martensite
Geometrical Aspect of Variant-pairing of Martensite in Steel
In-situ Neutron Diffraction Analysis of Deformation-induced Transformation Behavior in High-strength and High-ductility Metastable Austenitic Stainless Steel Produced by Cold-rolling and Partitioning Method
Influence of Strain Rate on Mechanical Behavior and Microstructure Evolution of Fe-0.10C-5Mn Medium Manganese Steel
Investigation on Gigapascal Martensitic Microstructures for Higher Bendability of Advanced High-strength Hot Stamped Steel
Low Temperature Martensitic Transformations in Fe-Ni Alloys: Insight from Iron Meteorite Analyses
Phase Field Study of Tempering in Maraging Steels
Substructure and Crystallographic Features of As-quenched Lath Martensitic Steels
Substructure Boundary Sliding in Lath Martensite Quantitatively Investigated by Using Molecular Dynamics (MD) Simulation and Experiment

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