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Early strain localization in strong work hardening aluminum alloy (2198 T3): 3D laminography and DVC measurement

Abstract : The effect of strain hardening on localization in front of a notch is assessed by following the interactions between strain concentrations, damage, initial microstructure and grain orientations. A CT-like specimen made of strong work hardening 2198 T3 aluminum alloy is subjected to an in situ synchrotron laminography experiment. Kinematic fields are measured via digital volume correlation. The final results are bulk displacement and strain fields including their corresponding resolutions. The reported results refer to the portion of the specimen around 1 mm away from the notch root. With the selected spatial resolution, damage nucleation and growth is evaluated in strained bands until the very end of the loading process.
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Submitted on : Monday, November 13, 2017 - 5:16:18 PM
Last modification on : Monday, July 5, 2021 - 9:48:17 AM

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  • HAL Id : hal-01634158, version 1

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Ante Buljac, Lukas Helfen, François Hild, Thilo Morgeneyer. Early strain localization in strong work hardening aluminum alloy (2198 T3): 3D laminography and DVC measurement. L. Lamberti, M.-T. Lin, C. Furlong, C. Sciammarella. Advancement of optical methods in experimental mechanics, volume 3, Springer, pp.15-17, 2018, Proceedings of the 2017 Annual Conference on Experimental and Applied Mechanics. ⟨hal-01634158⟩

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