期刊
MATERIALS
卷 11, 期 10, 页码 -出版社
MDPI
DOI: 10.3390/ma11102018
关键词
polycrystal plasticity; X-ray diffraction imaging; topotomography; in situ experiment; finite element simulation; lattice curvature; rocking curve
类别
资金
- Association Instituts Carnot [MIN ANR CA 6263]
- MINES Paristech
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 detail. 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. Dataset 10.5281/zenodo.1412401
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