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Meeting MS&T23: Materials Science & Technology
Symposium Advances in Understanding of Martensite in Steels II
Presentation Title Low Temperature Martensitic Transformations in Fe-Ni Alloys: Insight from Iron Meteorite Analyses
Author(s) Frederic Danoix, Raphaele Danoix, Fabien Cuvilly, Jerome Gattacceca, Clara Maurel, Matthieu Gounelle, Mathieu Roskosz, Louna Perez, Mohamed Gouné
On-Site Speaker (Planned) Frederic Danoix
Abstract Scope Metal matrix in iron meteorites are (roughly) bulk iron nickel alloys containing up to 35at%Ni. The initial metal alloy was melted in the core of early formed planetesimals, and was cooled at extremely low rates (measured in kelvin per million year) from austenite though a ferrite-austenite dual phase region. During cooling, the main transformation is the precipitation of Widmanstätten ferrite from austenite, generating the iconic microstructures of metallic meteorites. As it develops, the ferrite rejects nickel towards the austenite. In the highest nickel regions, austenite is stabilized down to very low temperatures, and may eventually transform to martensite with further cooling. The presence of martensite in meteorites with different microstructures is thus an element to retrieve their thermal and mechanical history, and thus an invaluable source of information regarding the early solar system history.


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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