1. Direct measurement of local constitutive relations, at the micrometre scale, in bulk metallic alloys.
- Author
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Plancher, E., Favier, V., Maurice, C., Bosso, E., Rupin, N., Stodolna, J., Loisnard, D., Marijon, J.-B., Petit, J., Micha, J.-S., Robach, O., and Castelnau, O.
- Subjects
MICROMETERS ,ALLOYS ,MATERIAL plasticity ,MECHANICAL behavior of materials ,DIGITAL images ,SIMULATION methods & models - Abstract
Multiscale models involving crystal plasticity are essential to predict the elastoplastic behavior of structural materials with respect to their microstructure. However, those models are often limited by a poor knowledge of the local constitutive behavior. This article reports a method to measure the mechanical behavior directly, at the micrometre scale, in bulk crystalline materials. Local strain and stress states were evaluated at the surface of a bent stainless steel crystal by combining total strain measurements - performed with the digital image correlation technique on optical images - with elastic strain measurements obtained by Laue microdiffraction. A local constitutive relation was measured, in an efficient nondestructive way, without the need for full-field simulations. The method was validated by a comparison between the measured local behavior and the macroscopic behavior of the single crystal. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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