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ID: 119310.0, MPI für Eisenforschung GmbH / Microstructure Physics and Metal Forming
Ridging and color changes of aluminum sheets during plastic straining
Authors:Raabe, D.; Sachtleber, M.
Name of Project/Experiment:Surface roughening and color changes of coated 6022-T4 aluminum sheets during plastic straining
Place of Project/Experiment:MPI für Eisenforschung GmbH, Düsseldorf, Germany
(Start) Date of Project/Experiment
Audience:Not Specified
Abstract / Description:The project report presents experimental results about surface roughening and color changes of coated (siloxane, soft anodic, epoxy) 6022-T4 aluminum sheets during plastic straining. Experiments are carried out using confocal microscopy and colorimetry. It is found that surface roughening of coated aluminium sheets during plastic deformation is a pronounced function of strain. Different strain regimes and loading modes can lead to different roughening mechanisms. This is indicated by changes in the slope of the roughness-strain curves. The roughening behavior of coated aluminium sheets can substantially differ from that of uncoated sheets of the same substrate material owing to the mechanical properties of the coatings. The coatings which differ in lightness and color values due to their layer thickness and chemical composition can in part undergo substantial changes in these values during straining. Small plastic strains affect in particular changes in color lightness.
Free Keywords:electron backscattering diffraction, roughness, aluminum, coating, sheet forming, surface mechanics, surface characterization, colorimetry, roping, ridging, color changes, texture, EBSD, surface strains
Document Type:Report
Affiliations:MPI für Eisenforschung GmbH
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