Polycrystalline solids under nonhydrostatic compression: Determination of strength from x-ray diffraction data
IR@NAL: CSIR-National Aerospace Laboratories, Bangalore
View Archive Info| Field | Value | |
| Title |
Polycrystalline solids under nonhydrostatic compression: Determination of strength from x-ray diffraction data
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| Creator |
Singh, AK
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| Subject |
Chemistry and Materials (General)
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| Description |
A polycrystalline sample compressed in a diamond anvil cell (DAC) without any pressure transmitting medium develops a stress state at the centre of the sample that is axially symmetric about the load axis. The axial stress component is larger than the radial component and the difference t between the two is taken as a measure of the compressive strength of the sample material at a confining pressure that equals the mean normal stress. A proper analysis of the diffraction data yields t. The data taken with the radial diffraction geometry, wherein the incident x-ray beam is perpendicular to the load axis of the DAC, give reliable estimates of strength. The diffraction data obtained with the conventional geometry, wherein the incident x-ray beam passes parallel to the DAC axis, provide reasonable estimates of strength. However, even in this case, reliable strength data can be obtained by combining the measured pressure-volume data under nonhydrostatic compression and the hydrostat derived from an independent source. The determination of strength from high pressure diffraction data is discussed.
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| Publisher |
IOP
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| Date |
2014
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| Type |
Journal Article
PeerReviewed |
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| Format |
application/pdf
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| Identifier |
http://nal-ir.nal.res.in/12056/1/strength_review_2014.pdf
Singh, AK (2014) Polycrystalline solids under nonhydrostatic compression: Determination of strength from x-ray diffraction data. Journal of Physics: Conference Series, 500 . |
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| Relation |
http://iopscience.iop.org/1742-6596/500/12/122005
http://nal-ir.nal.res.in/12056/ |
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