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Meeting 2023 TMS Annual Meeting & Exhibition
Symposium Advanced Characterization Techniques for Quantifying and Modeling Deformation
Presentation Title Investigating the Influence of Precipitates on Strengthening Mechanisms in Mg Alloys Using Phase-field Simulations
Author(s) Darshan Bamney, Laurent Capolungo
On-Site Speaker (Planned) Darshan Bamney
Abstract Scope Precipitation hardening is a key strategy for improving the overall strength and ductility of Mg alloys. In Mg-Al alloys, basal precipitates are known to impede the growth of deformation twins resulting in a substantial increase in the critical resolved shear stress (CRSS) necessary for continued growth. Although several models have been proposed to quantify the influence of precipitate shape, size, and volume fraction on the CRSS, there is considerable scatter in the predictions. Moreover, the role of the local stress state at the precipitate-matrix and precipitate-twin interface on hardening remains to be understood. In this study, we systematically investigate the interactions between {10-12} twins in Mg, and Mg-Al precipitates to scrutinize the predictive capabilities of proposed hardening models, using atomistically-informed 3D phase field simulations. Ultimately, the hardening data is used to propose a model for the CRSS required for continued twinning deformation in the presence of precipitates.
Proceedings Inclusion? Planned:
Keywords Magnesium, Mechanical Properties, Modeling and Simulation

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Application of Constant Contact Pressure Nanoindentation on Room Temperature Creep: Reliability and Advantage
Capturing the 3D Evolution of Twin Networks in Titanium as a Function of Applied Strain
Characterization of the Impact of Grain-Neighborhoods on Cyclic Twinning in Magnesium Alloys Using High Energy X-Ray Diffraction
Characterizing Structure and Deformation in Molecular Dynamics Simulations of Shock Compressed Silicon and Diamond Carbon
Coded Apertures for Fast Depth Resolved Diffraction and In-situ Characterization
Coupled Neutron Diffraction and Modeling Study of the Formation and Recovery of Dislocations in Elemental Tantalum and Ferritic HT-9 Steel
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Effect of Self-Annealing Phenomena on the Microstructural and Texture Evolution in Cryogenically Rolled Cu-Fe-P alloy
Effect of Strain Rate on Slip Activation in a Mg-Al alloy by In-situ 3DXRD
Elasto-visco-plastic Crystallographic Modeling of Thermal Ratcheting in Uranium
Evolution of Stresses during Twinning and Detwinning in Magnesium
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Kink Band Formation in Nano Metallic Laminates
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Monitoring Defect Structure Evolution in Titanium Alloys using High-Energy X-ray Diffraction
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