caa a22 4500 463217187 CHVBK 20180405153200.0 cr unu---uuuuu 170326e20071101xx s 000 0 eng 10.1007/s00269-007-0174-6 doi (NATIONALLICENCE)springer-10.1007/s00269-007-0174-6 Dauphiné twinning and texture memory in polycrystalline quartz [Elektronische Daten] Part 2: In situ neutron diffraction compression experiments [H.-R. Wenk, M. Bortolotti, N. Barton, E. Oliver, D. Brown] Mechanical twinning in polycrystalline quartz was investigated in situ with time-of-flight neutron diffraction and a strain diffractometer. Dauphiné twinning is highly temperature sensitive. It initiates at a macroscopic differential stress of 50-100MPa and, at 500°C, saturates at 400MPa. From normalized diffraction intensities the patterns of preferred orientation (or texture) can be inferred. They indicate a partial reversal of twinning during unloading. The remaining twins impose residual stresses corresponding to elastic strains of 300-400 microstrain. Progressive twinning on loading and reversal during unloading, as well as the temperature dependence, can be reproduced with finite element model simulations. Springer-Verlag, 2007 Quartz nationallicence Mechanical twinning nationallicence In situ neutron diffraction nationallicence FEM nationallicence Wenk H.-R Department of Earth and Planetary Science, University of California, 94720, Berkeley, CA, USA aut Bortolotti M. Department of Earth and Planetary Science, University of California, 94720, Berkeley, CA, USA aut Barton N. Lawrence Livermore National Laboratory, 94551, Livermore, CA, USA aut Oliver E. ISIS, Rutherford Appleton Laboratory, OX11 0QX, Chilton, Didcot, UK aut Brown D. Lujan Center, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut Physics and Chemistry of Minerals Springer-Verlag 34/9(2007-11-01), 599-607 0342-1791 34:9<599 2007 34 269 https://doi.org/10.1007/s00269-007-0174-6 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00269-007-0174-6 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Wenk H.-R Department of Earth and Planetary Science, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Bortolotti M. Department of Earth and Planetary Science, University of California, 94720, Berkeley, CA, USA aut NATIONALLICENCE 700 1- Barton N. Lawrence Livermore National Laboratory, 94551, Livermore, CA, USA aut NATIONALLICENCE 700 1- Oliver E. ISIS, Rutherford Appleton Laboratory, OX11 0QX, Chilton, Didcot, UK aut NATIONALLICENCE 700 1- Brown D. Lujan Center, Los Alamos National Laboratory, 87545, Los Alamos, NM, USA aut NATIONALLICENCE 773 0- Physics and Chemistry of Minerals Springer-Verlag 34/9(2007-11-01), 599-607 0342-1791 34:9<599 2007 34 269 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer