Preprint Article Version 1 This version is not peer-reviewed

Incipient Bulk Polycrystal Plasticity Observed by Synchrotron in-situ Topotomography

Version 1 : Received: 10 September 2018 / Approved: 10 September 2018 / Online: 10 September 2018 (16:12:39 CEST)

A peer-reviewed article of this Preprint also exists.

Proudhon, H.; Guéninchault, N.; Forest, S.; Ludwig, W. Incipient Bulk Polycrystal Plasticity Observed by Synchrotron In-Situ Topotomography. Materials 2018, 11, 2018. Proudhon, H.; Guéninchault, N.; Forest, S.; Ludwig, W. Incipient Bulk Polycrystal Plasticity Observed by Synchrotron In-Situ Topotomography. Materials 2018, 11, 2018.

Journal reference: Materials 2018, 11, 2018
DOI: 10.3390/ma11102018

Abstract

In this paper, we present a comprehensive 4D study of the early stage of plastic deformation in a polycrystalline binary AlLi alloy. The entire microstructure is mapped with X-ray diffraction contrast tomography and a set of bulk grains is further studied via X-ray topotomography during mechanical loading. The observed contrast is analyzed with respect to the slip system activation and the evolution of the orientation spread is measured as a function of applied strain. The experimental observations are augmented by the mechanical response predicted by crystal plasticity finite element simulations to analyze the onset of plasticity in details. Simulation results show a general agreement of the individual slip system activation during loading and that comparison with experiments at the length scale of the grains may be used to fine tune the constitutive model parameters.

Subject Areas

Polycrystal plasticity; X-ray diffraction imaging; Topotomography; in situ experiment; Finite element simulation, lattice curvature, rocking curve

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