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Meeting 2026 TMS Annual Meeting & Exhibition
Symposium Microstructure-Sensitive Modeling Across Length Scales: An MPMD/SMD Symposium in Honor of David L. McDowell
Presentation Title Strain Localization in Fatigue of FCC and HCP Materials
Author(s) Jean Charles Stinville, Benham Ahmadikia, Irene Beyerlein, Tresa M. Pollock
On-Site Speaker (Planned) Tresa M. Pollock
Abstract Scope Recent advances in accelerated fatigue testing, in-situ electron microscopy, digital image correlation have been integrated to quantitatively analyze slip events and their reversibility during fatigue. Quantitative relations between the yield and ultimate tensile strength, fatigue strength and the physical characteristics of early slip localization events are identified for a large set of FCC and HCP materials. The fatigue strength in the VHCF regime can be predicted by the amplitude of localization during the first cycle of loading. Additionally, the intensity of slip and spacings between localization events are strongly related to material yield strength. Using a three-dimensional crystal plasticity-based micromechanical model that explicitly simulates the growth of discrete slip localizations, it is shown that the stronger the metal, the faster and earlier that slip localizations intensify. The relationship is attributed to the formation of a zone that surrounds the slip localization where the driving force for slip is absent.
Proceedings Inclusion? Planned:
Keywords Characterization, High-Temperature Materials, Mechanical Properties

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Atomic Structure Dependence of Mesoscale Plastic Shear Localization
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Disconnection Mechanics: Segregation, Stability, and Mobility at Interfaces
Dislocation - Grain Boundary Interactions Modeled at Atomistic and Mesoscopic Length Scales
Dislocation Mobility in Metals Undergoing High Rate Plastic Deformation
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Effects of Grain Neighborhood on Local Piezoelectric Response and Stress Concentration in Bulk Polycrystals
Effects of Hydrogen Assisted Vacancy Production on Diffusional Creep Investigated via a Coupled Cluster Dynamics-Crystal Plasticity Framework
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From Atoms to Engines - Applications of Multi-Scale Modeling to Solve Critical Materials Challenges Facing Industry Today
Full-Field and Mean-Field Strain-Gradient Crystal Plasticity Models for Predicting Geometrically Necessary Dislocations and Length-Scale Dependent Mechanical Response
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Insights Into the Evolution of Slip in Cyclically Loaded IN718 Using Crystal Plasticity Finite Element, High Energy X-Ray Diffraction Microscopy and TriBeam Tomography
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Rapid Microstructural-Scale Defect Assessment for AM Materials
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