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Meeting MS&T23: Materials Science & Technology
Symposium Advances in Understanding of Martensite in Steels II
Presentation Title Substructure Boundary Sliding in Lath Martensite Quantitatively Investigated by Using Molecular Dynamics (MD) Simulation and Experiment
Author(s) Meng Zhang, Shuang Gong, Junya Inoue
On-Site Speaker (Planned) Meng Zhang
Abstract Scope A molecular dynamics simulation utilizing an artificial neural network potential in combination with experimental measurements is carried out to further understand the plastic deformation in lath martensite. The results show that the substructure boundary sliding strongly depends on the angle between the MRSSP and the boundary, the misorientation angle (θ_m), and the twist components of boundaries. In the experiment, many distributed and localized slip bands (SBs) are observed. Based on simulations, the boundaries with favorable θ_m and twist components are chosen. The profile of the plastic region is in good agreement with the distribution of favorable boundaries. The distributed SBs are caused by that the large Schmid factor (SF) on the boundary leads to many boundaries sliding. Otherwise, the large SF inside of the lath results in dislocation inside of the lath moving to the boundary first and then sliding along the boundary, which makes the localized SBs formation.


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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