globalchange  > 影响、适应和脆弱性
DOI: 10.1016/j.epsl.2018.03.029
Scopus记录号: 2-s2.0-85044125408
论文题名:
Deformation-induced crystallographic-preferred orientation of hcp-iron: An experimental study using a deformation-DIA apparatus
作者: Nishihara Y.; Ohuchi T.; Kawazoe T.; Seto Y.; Maruyama G.; Higo Y.; Funakoshi K.-I.; Tange Y.; Irifune T.
刊名: Earth and Planetary Science Letters
ISSN: 0012821X
出版年: 2018
卷: 490
起始页码: 151
结束页码: 160
语种: 英语
英文关键词: crystallographic-preferred orientation ; deformation experiments ; hcp-Fe ; inner core ; seismic anisotropy
Scopus关键词: Acoustic wave velocity ; Anisotropy ; Calculations ; Seismic waves ; Shear flow ; Single crystals ; X ray diffraction ; Ab initio calculations ; Crystallographic preferred orientations ; Deformation conditions ; Hexagonal close-packed iron (hcp-Fe) ; Inner core ; Seismic anisotropy ; Two-dimensional X-ray diffractions ; Uni-axial compression ; Crystallography
英文摘要: Shear and uniaxial deformation experiments on hexagonal close-packed iron (hcp-Fe) was conducted using a deformation-DIA apparatus at a pressure of 13–17 GPa and a temperature of 723 K to determine its deformation-induced crystallographic-preferred orientation (CPO). Development of the CPO in the deforming sample is determined in-situ based on two-dimensional X-ray diffraction using monochromatic synchrotron X-rays. In the shear deformation geometry, the 〈0001〉 and 〈112¯0〉 axes gradually align to be sub-parallel to the shear plane normal and shear direction, respectively, from the initial random texture. In the uniaxial compression and tensile geometry, the 〈0001〉 and 〈112¯0〉 axes, respectively, gradually align along the direction of the uniaxial deformation axis. These results suggest that basal slip (0001)〈112¯0〉 is the dominant slip system in hcp-Fe under the studied deformation conditions. The P-wave anisotropy for a shear deformed sample was calculated using elastic constants at the inner core condition by recent ab-initio calculations. Strength of the calculated anisotropy was comparable to or higher than axisymmetric anisotropy in Earth's inner core. © 2018 Elsevier B.V.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109953
Appears in Collections:影响、适应和脆弱性
气候变化事实与影响

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作者单位: Geodynamics Research Center, Ehime University, 2-5 Bunkyo-cho, Matsuyama, Ehime 790-8577, Japan; Department of Earth and Planetary Systems Science, Graduate School of Science, Hiroshima University, 1-3-1 Kagamiyama, Higashi-Hiroshima, Hiroshima 739-8526, Japan; Department of Planetology, Graduate School of Science, Kobe University, 1-1, Rokkodai-cho, Nada-ku, Kobe, Hyogo 657-8501, Japan; Japan Synchrotron Radiation Research Institute, 1-1-1 Koto, Sayo-cho, Sayo-gun, Hyogo, Japan; Neutron Science and Technology Center, IQBRC Bldg, 162-1 Shirakata, Tokai, Naka, Ibaraki, 319-1106, Japan

Recommended Citation:
Nishihara Y.,Ohuchi T.,Kawazoe T.,et al. Deformation-induced crystallographic-preferred orientation of hcp-iron: An experimental study using a deformation-DIA apparatus[J]. Earth and Planetary Science Letters,2018-01-01,490
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