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Observations of grain size sensitive power law creep of olivine aggregates over a large range of lattice‐preferred orientation strength
Grain size sensitive (GSS) power law creep of San Carlos olivine aggregates was investigated by comparing strain rates measured in laboratory deformation experiments to strain rates determined from a micromechanical model of intragranular dislocation processes. The plastic flow behavior of olivine a...
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| Published in: | Journal of geophysical research. Solid earth 2016-02, Vol.121 (2), p.506-516 |
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| Main Authors: | , , , , , |
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| Language: | English |
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| cited_by | cdi_FETCH-LOGICAL-a4950-21640db9cc1ca7a4e7d2b52d350fd99ea0e7f5ec617053c19999607bbfde4b7d3 |
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| cites | cdi_FETCH-LOGICAL-a4950-21640db9cc1ca7a4e7d2b52d350fd99ea0e7f5ec617053c19999607bbfde4b7d3 |
| container_end_page | 516 |
| container_issue | 2 |
| container_start_page | 506 |
| container_title | Journal of geophysical research. Solid earth |
| container_volume | 121 |
| creator | Tielke, Jacob A. Hansen, Lars N. Tasaka, Miki Meyers, Cameron Zimmerman, Mark E. Kohlstedt, David L. |
| description | Grain size sensitive (GSS) power law creep of San Carlos olivine aggregates was investigated by comparing strain rates measured in laboratory deformation experiments to strain rates determined from a micromechanical model of intragranular dislocation processes. The plastic flow behavior of olivine aggregates due solely to intragranular slip was determined using flow laws for olivine single crystals in combination with grain orientations measured by electron backscatter diffraction. Measured strain rates were compared to results from the micromechanical model for samples deformed in compression to an axial strain of |
| doi_str_mv | 10.1002/2015JB012302 |
| format | article |
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Key Points
Olivine aggregates deform faster than the rates determined from a model of intragranular slip
The difference between the measured and calculated strain rates is dependent upon grain size
GSS power law creep occurs in weakly and strongly textured olivine aggregates</description><identifier>ISSN: 2169-9313</identifier><identifier>EISSN: 2169-9356</identifier><identifier>DOI: 10.1002/2015JB012302</identifier><language>eng</language><publisher>Washington: Blackwell Publishing Ltd</publisher><subject>Aggregates ; Alloys ; Axial strain ; Backscatter ; Compression ; Creep (materials) ; Crystals ; Deformation ; Diffraction ; Diffusion ; Dislocations ; Dye dispersion ; Electron backscatter diffraction ; Geophysics ; Grain boundary sliding ; Grain size ; LPO ; mantle ; Mathematical models ; Olivine ; Particle size ; Plastic flow ; Plastics ; Power law ; Preferred orientation ; rheology ; Shear strain ; Single crystals ; Slip ; Solifluction ; Strain ; Strain rate ; Strength ; Torsion</subject><ispartof>Journal of geophysical research. Solid earth, 2016-02, Vol.121 (2), p.506-516</ispartof><rights>2016. American Geophysical Union. All Rights Reserved.</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a4950-21640db9cc1ca7a4e7d2b52d350fd99ea0e7f5ec617053c19999607bbfde4b7d3</citedby><cites>FETCH-LOGICAL-a4950-21640db9cc1ca7a4e7d2b52d350fd99ea0e7f5ec617053c19999607bbfde4b7d3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids></links><search><creatorcontrib>Tielke, Jacob A.</creatorcontrib><creatorcontrib>Hansen, Lars N.</creatorcontrib><creatorcontrib>Tasaka, Miki</creatorcontrib><creatorcontrib>Meyers, Cameron</creatorcontrib><creatorcontrib>Zimmerman, Mark E.</creatorcontrib><creatorcontrib>Kohlstedt, David L.</creatorcontrib><title>Observations of grain size sensitive power law creep of olivine aggregates over a large range of lattice‐preferred orientation strength</title><title>Journal of geophysical research. Solid earth</title><description>Grain size sensitive (GSS) power law creep of San Carlos olivine aggregates was investigated by comparing strain rates measured in laboratory deformation experiments to strain rates determined from a micromechanical model of intragranular dislocation processes. The plastic flow behavior of olivine aggregates due solely to intragranular slip was determined using flow laws for olivine single crystals in combination with grain orientations measured by electron backscatter diffraction. Measured strain rates were compared to results from the micromechanical model for samples deformed in compression to an axial strain of <0.2 and in torsion to a shear strain of up to 7.4. Olivine aggregates deform up to a factor of 4.6 times faster than the maximum possible rates determined from the micromechanical model of intragranular slip. Comparison of our data to published flow laws indicates that diffusion creep cannot account for this difference. The ratio of experimentally determined strain rates to those from the micromechanical model is strongly dependent upon grain size but is independent of stress and strength of lattice‐preferred orientation. These observations indicate that GSS power law creep, consistent with dislocation‐accommodated grain boundary sliding, occurs in both weakly and strongly textured olivine aggregates at the studied conditions.
Key Points
Olivine aggregates deform faster than the rates determined from a model of intragranular slip
The difference between the measured and calculated strain rates is dependent upon grain size
GSS power law creep occurs in weakly and strongly textured olivine aggregates</description><subject>Aggregates</subject><subject>Alloys</subject><subject>Axial strain</subject><subject>Backscatter</subject><subject>Compression</subject><subject>Creep (materials)</subject><subject>Crystals</subject><subject>Deformation</subject><subject>Diffraction</subject><subject>Diffusion</subject><subject>Dislocations</subject><subject>Dye dispersion</subject><subject>Electron backscatter diffraction</subject><subject>Geophysics</subject><subject>Grain boundary sliding</subject><subject>Grain size</subject><subject>LPO</subject><subject>mantle</subject><subject>Mathematical models</subject><subject>Olivine</subject><subject>Particle size</subject><subject>Plastic flow</subject><subject>Plastics</subject><subject>Power law</subject><subject>Preferred orientation</subject><subject>rheology</subject><subject>Shear strain</subject><subject>Single crystals</subject><subject>Slip</subject><subject>Solifluction</subject><subject>Strain</subject><subject>Strain rate</subject><subject>Strength</subject><subject>Torsion</subject><issn>2169-9313</issn><issn>2169-9356</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2016</creationdate><recordtype>article</recordtype><recordid>eNp90UFrFTEQAOBFKlhqb_6AgBcPPp3ZbDYvR1vaaikURM9LNju7pmyTdZL3Hu3Jqzd_o7_E1CciHjqHZAhfkkmmql4gvEGA-m0NqC5PAGsJ9ZPqsMbWrIxU7cHfHOWz6jilGyixLkvYHFbfr_tEvLXZx5BEHMXE1geR_D2JRCH57LcklrgjFrPdCcdEy4OLs9_6QMJOE9NkM5Xd24JsYTyRYBvKWOBsc_aOfn77sTCNxEyDiOwp5N-XipSZwpS_PK-ejnZOdPxnPqo-n599On2_urq--HD67mplG6NgVd7SwNAb59BZbRvSQ92repAKxsEYskB6VORa1KCkQ1OiBd3340BNrwd5VL3an7tw_LqhlLtbnxzNsw0UN6nDNYACQIRCX_5Hb-KGQ6muQwONaWtp1KNKa6VxvVa6qNd75TimVH6iW9jfWr7rELqHBnb_NrBwuec7P9Pdo7a7vPh4orBpQP4ChS2eFw</recordid><startdate>201602</startdate><enddate>201602</enddate><creator>Tielke, Jacob A.</creator><creator>Hansen, Lars N.</creator><creator>Tasaka, Miki</creator><creator>Meyers, Cameron</creator><creator>Zimmerman, Mark E.</creator><creator>Kohlstedt, David L.</creator><general>Blackwell Publishing Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7ST</scope><scope>7TG</scope><scope>8FD</scope><scope>C1K</scope><scope>F1W</scope><scope>FR3</scope><scope>H8D</scope><scope>H96</scope><scope>KL.</scope><scope>KR7</scope><scope>L.G</scope><scope>L7M</scope><scope>SOI</scope></search><sort><creationdate>201602</creationdate><title>Observations of grain size sensitive power law creep of olivine aggregates over a large range of lattice‐preferred orientation strength</title><author>Tielke, Jacob A. ; Hansen, Lars N. ; Tasaka, Miki ; Meyers, Cameron ; Zimmerman, Mark E. ; Kohlstedt, David L.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-a4950-21640db9cc1ca7a4e7d2b52d350fd99ea0e7f5ec617053c19999607bbfde4b7d3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2016</creationdate><topic>Aggregates</topic><topic>Alloys</topic><topic>Axial strain</topic><topic>Backscatter</topic><topic>Compression</topic><topic>Creep (materials)</topic><topic>Crystals</topic><topic>Deformation</topic><topic>Diffraction</topic><topic>Diffusion</topic><topic>Dislocations</topic><topic>Dye dispersion</topic><topic>Electron backscatter diffraction</topic><topic>Geophysics</topic><topic>Grain boundary sliding</topic><topic>Grain size</topic><topic>LPO</topic><topic>mantle</topic><topic>Mathematical models</topic><topic>Olivine</topic><topic>Particle size</topic><topic>Plastic flow</topic><topic>Plastics</topic><topic>Power law</topic><topic>Preferred orientation</topic><topic>rheology</topic><topic>Shear strain</topic><topic>Single crystals</topic><topic>Slip</topic><topic>Solifluction</topic><topic>Strain</topic><topic>Strain rate</topic><topic>Strength</topic><topic>Torsion</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Tielke, Jacob A.</creatorcontrib><creatorcontrib>Hansen, Lars N.</creatorcontrib><creatorcontrib>Tasaka, Miki</creatorcontrib><creatorcontrib>Meyers, Cameron</creatorcontrib><creatorcontrib>Zimmerman, Mark E.</creatorcontrib><creatorcontrib>Kohlstedt, David L.</creatorcontrib><collection>CrossRef</collection><collection>Environment Abstracts</collection><collection>Meteorological & Geoastrophysical Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ASFA: Aquatic Sciences and Fisheries Abstracts</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) 2: Ocean Technology, Policy & Non-Living Resources</collection><collection>Meteorological & Geoastrophysical Abstracts - Academic</collection><collection>Civil Engineering Abstracts</collection><collection>Aquatic Science & Fisheries Abstracts (ASFA) Professional</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>Journal of geophysical research. Solid earth</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Tielke, Jacob A.</au><au>Hansen, Lars N.</au><au>Tasaka, Miki</au><au>Meyers, Cameron</au><au>Zimmerman, Mark E.</au><au>Kohlstedt, David L.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Observations of grain size sensitive power law creep of olivine aggregates over a large range of lattice‐preferred orientation strength</atitle><jtitle>Journal of geophysical research. Solid earth</jtitle><date>2016-02</date><risdate>2016</risdate><volume>121</volume><issue>2</issue><spage>506</spage><epage>516</epage><pages>506-516</pages><issn>2169-9313</issn><eissn>2169-9356</eissn><abstract>Grain size sensitive (GSS) power law creep of San Carlos olivine aggregates was investigated by comparing strain rates measured in laboratory deformation experiments to strain rates determined from a micromechanical model of intragranular dislocation processes. The plastic flow behavior of olivine aggregates due solely to intragranular slip was determined using flow laws for olivine single crystals in combination with grain orientations measured by electron backscatter diffraction. Measured strain rates were compared to results from the micromechanical model for samples deformed in compression to an axial strain of <0.2 and in torsion to a shear strain of up to 7.4. Olivine aggregates deform up to a factor of 4.6 times faster than the maximum possible rates determined from the micromechanical model of intragranular slip. Comparison of our data to published flow laws indicates that diffusion creep cannot account for this difference. The ratio of experimentally determined strain rates to those from the micromechanical model is strongly dependent upon grain size but is independent of stress and strength of lattice‐preferred orientation. These observations indicate that GSS power law creep, consistent with dislocation‐accommodated grain boundary sliding, occurs in both weakly and strongly textured olivine aggregates at the studied conditions.
Key Points
Olivine aggregates deform faster than the rates determined from a model of intragranular slip
The difference between the measured and calculated strain rates is dependent upon grain size
GSS power law creep occurs in weakly and strongly textured olivine aggregates</abstract><cop>Washington</cop><pub>Blackwell Publishing Ltd</pub><doi>10.1002/2015JB012302</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| ispartof | Journal of geophysical research. Solid earth, 2016-02, Vol.121 (2), p.506-516 |
| issn | 2169-9313 2169-9356 |
| language | eng |
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| source | Wiley-Blackwell Read & Publish Collection; Alma/SFX Local Collection |
| subjects | Aggregates Alloys Axial strain Backscatter Compression Creep (materials) Crystals Deformation Diffraction Diffusion Dislocations Dye dispersion Electron backscatter diffraction Geophysics Grain boundary sliding Grain size LPO mantle Mathematical models Olivine Particle size Plastic flow Plastics Power law Preferred orientation rheology Shear strain Single crystals Slip Solifluction Strain Strain rate Strength Torsion |
| title | Observations of grain size sensitive power law creep of olivine aggregates over a large range of lattice‐preferred orientation strength |
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