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<datestamp>2018-01-11</datestamp>
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<title lang=en>On the deformation mechanism of olivine single crystals at lithospheric temperatures: an electron tomography study</title>
<creator>Mussi, Alexandre</creator>
<creator>Nafi, Maula</creator>
<creator>Demouchy, Sylvie</creator>
<creator>Cordier, Patrick</creator>
<contributor>Unité Matériaux et Transformations - UMR 8207 (UMET) ; Institut National de la Recherche Agronomique (INRA) - Université de Lille, Sciences et Technologies - Ecole Nationale Supérieure de Chimie de Lille (ENSCL) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<contributor>Manteau et Interfaces ; Géosciences Montpellier ; Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS) - Université des Antilles et de la Guyane (UAG) - Institut national des sciences de l'Univers (INSU - CNRS) - Université de Montpellier (UM) - Centre National de la Recherche Scientifique (CNRS)</contributor>
<description>International audience</description>
<source>ISSN: 0935-1221</source>
<source>European Journal of Mineralogy</source>
<publisher>E Schweizerbart Science Publishers</publisher>
<identifier>hal-01277821</identifier>
<identifier>https://hal.archives-ouvertes.fr/hal-01277821</identifier>
<source>https://hal.archives-ouvertes.fr/hal-01277821</source>
<source>European Journal of Mineralogy, E Schweizerbart Science Publishers, 2015, 27 (6), pp.707-715. 〈10.1127/ejm/2015/0027-2481〉</source>
<identifier>DOI : 10.1127/ejm/2015/0027-2481</identifier>
<relation>info:eu-repo/semantics/altIdentifier/doi/10.1127/ejm/2015/0027-2481</relation>
<language>en</language>
<subject lang=en>olivine</subject>
<subject lang=en>dislocation</subject>
<subject lang=en>cross-slip</subject>
<subject lang=en>rheology</subject>
<subject lang=en>plasticity</subject>
<subject lang=en>electron tomography</subject>
<subject lang=en>hardening</subject>
<subject>[SDU.STU.PE] Sciences of the Universe [physics]/Earth Sciences/Petrography</subject>
<type>info:eu-repo/semantics/article</type>
<type>Journal articles</type>
<description lang=en>We present an electron tomography study of dislocations in deformed olivine single crystals, at ca. 0.5 T m, along two distinct orientations. The easiest slip systems are [001](100) and [001]{110}. Disorientating a single crystal away from easy glide conditions leads to massive cross-slip, which generates three-dimensional dislocations, and thus contributes to hardening. Fast motion of curved non-screw dislocation in those planes leaves long straight screw dislocations which bear lattice friction and control plastic strain. We have identified several hardening mechanisms. Non-screw [001] dislocations interact elastically to form dipoles. Recovery mechanisms leading to dipole annihilation are observed, but they are slow at those temperatures and produce numerous sessile loops. These loops represent obstacles for gliding dislocations. Interactions between dislocations and sessile loops produce sessile segments (super jogs), which efficiently impede dislocation motions.</description>
<date>2015</date>
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