naa a22 4500 510769691 CHVBK 20180411083209.0 cr unu---uuuuu 180411e20130101xx s 000 0 eng 10.1007/s11837-012-0504-0 doi (NATIONALLICENCE)springer-10.1007/s11837-012-0504-0 In Situ Observation of the Dislocation Structure Evolution During a Strain Path Change in Copper [Elektronische Daten] [Christian Wejdemann, Henning Poulsen, Ulrich Lienert, Wolfgang Pantleon] The evolution of deformation structures in individual grains embedded in polycrystalline copper specimens during strain path changes is observed in situ by high-resolution reciprocal space mapping with high-energy synchrotron radiation. A large number of individual subgrains is resolved; their behavior during the strain path change is revealed and complemented by the analysis of radial x-ray peak profiles for the entire grain. This allows distinction between two different regimes during the mechanically transient behavior following the strain path change: Below 0.3% strain, the number and orientation of the resolved subgrains change only slightly, while their elastic stresses are significantly altered. This indicates the existence of a microplastic regime during which only the subgrains deform plastically and no yielding of the dislocation walls occurs. After reloading above 0.3% strain, the elastic stresses of individual subgrains are about the same as in unidirectionally deformed reference specimens. They increase only slightly during further straining—accompanied by occasional emergence of new subgrains, abundant orientation changes, and disappearance of existing subgrains. The Author(s), 2012 Wejdemann Christian Department of Mechanical Engineering, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark aut Poulsen Henning Department of Physics, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark aut Lienert Ulrich DESY Photon Science, Deutsches Elektronen-Synchrotron, 22603, Hamburg, Germany aut Pantleon Wolfgang Department of Mechanical Engineering, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark aut JOM Springer US; http://www.springer-ny.com 65/1(2013-01-01), 35-43 1047-4838 65:1<35 2013 65 11837 https://doi.org/10.1007/s11837-012-0504-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11837-012-0504-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wejdemann Christian Department of Mechanical Engineering, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark aut NATIONALLICENCE 700 1- Poulsen Henning Department of Physics, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark aut NATIONALLICENCE 700 1- Lienert Ulrich DESY Photon Science, Deutsches Elektronen-Synchrotron, 22603, Hamburg, Germany aut NATIONALLICENCE 700 1- Pantleon Wolfgang Department of Mechanical Engineering, Technical University of Denmark, 2800, Kgs. Lyngby, Denmark aut NATIONALLICENCE 773 0- JOM Springer US; http://www.springer-ny.com 65/1(2013-01-01), 35-43 1047-4838 65:1<35 2013 65 11837 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer