Sub-grain scale elastic and plastic deformations in polycrystalline metallic alloys assessed via digital image correlation techniques

Abstract : High resolution scanning electron microscopy (HR-SEM) and laser scanning confocal microscopy (HR-LSCM) digital image correlation (DIC) techniques were investigated for assessing strain distribution within individual grains during deformation in the macroscopic elastic and plastic regime. The anisotropic response of a Ni-based polycrystalline superalloy was experimentally demonstrated at the grain scale. Local plastic strain localization within preferentially oriented grains was documented under loading as low as 80% of the macroscopic yield strength of the material. Intense strains along bands were observed in the macroscopic plastic regime, correlating with {111}[1-10] slip systems.
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https://hal.archives-ouvertes.fr/hal-01825043
Contributor : Damien Texier <>
Submitted on : Thursday, June 28, 2018 - 8:47:23 AM
Last modification on : Tuesday, October 22, 2019 - 5:20:43 PM

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  • HAL Id : hal-01825043, version 1

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Jean-Charles Stinville, Damien Texier, Nicolas Vanderesse, Florent Bridier, Jia Liu, et al.. Sub-grain scale elastic and plastic deformations in polycrystalline metallic alloys assessed via digital image correlation techniques. Photomechanics 2018, Mar 2018, Toulouse, France. ⟨hal-01825043⟩

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