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Spatial distribution of the net Burgers vector density in a deformed single crystal
2016 (English)In: International journal of plasticity, ISSN 0749-6419, E-ISSN 1879-2154, Vol. 85, p. 110-129Article in journal (Refereed) Published
Abstract [en]

A two-dimensional deformation field on an indented single crystal, where the only nonzero lattice rotation occurs in the plane of deformation and only three effective in-plane slip systems are activated, is investigated both experimentally and numerically. ElectronBackscatter Diffraction (EBSD) is utilized to probe the lattice rotation field on the sample. The lattice rotation field is utilized to calculate the two non-zero components of Nye'sdislocation density tensor, which serves as a link between plastic and elastic deformation states. The enhanced accuracy of EBSD enabled measurements of the net Burgers vector density, and a new quantity β, which monitors the activity of slip systems in the deformed zone. The β-field is compared to the slip system activity obtained by analytical solution and also by crystal plasticity simulations. A qualitative comparison of the three methods confirms that the β-field obtained experimentally agrees with the slip system activity obtained analytically and by numerical methods.

Place, publisher, year, edition, pages
Elsevier, 2016. Vol. 85, p. 110-129
National Category
Applied Mechanics
Research subject
Solid Mechanics; Engineering Mechanics; Materials Science and Engineering
Identifiers
URN: urn:nbn:se:kth:diva-248469DOI: 10.1016/j.ijplas.2016.07.005ISI: 000383006900006OAI: oai:DiVA.org:kth-248469DiVA, id: diva2:1303359
Note

QC 20190429

Available from: 2019-04-09 Created: 2019-04-09 Last updated: 2019-10-11Bibliographically approved

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Dahlberg, Carl F. O.

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  • apa
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