Strength of iron under pressure up to 55 GPa from X-ray diffraction line-width analysis13;

Singh, AK and Anjana, Jain and Liermann, HP and Saxena, SK (2005) Strength of iron under pressure up to 55 GPa from X-ray diffraction line-width analysis13;. Journal of Physics and Chemistry of Solids, 67 (9-10). pp. 2197-2202.

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Abstract

The X-ray diffraction patterns are recorded from polycrystalline iron sample compressed in a diamond anvil cell up to 55 GPa. The maximum micro-stress in the sample, a measure of compressive strength, is derived from the line-width analysis. The strength of iron in the body centered cubic (BCC)-phase is 1.1amp;plusmn;0.2 GPa. This value is in good agreement with the strength derived from the hardness vs. grain-size data. The strength increases steeply during the BCC-hexagonal closed packed (HCP) transition. The strength-pressure data for HCP-iron fit the relation amp;sigma; = 2.9 + 0.028 P, where amp;sigma; and P are the compressive strength and pressure in GPa, respectively. The present results agree well with those obtained from the line shift analysis carried out in earlier studies.

Item Type: Journal Article
Uncontrolled Keywords: X-ray diffraction;Polycrystalline;Grain-size data
Subjects: PHYSICS > Physics(General)
Division/Department: Materials Science Division, Surface Engineering Division, Other, Other
Depositing User: M/S ICAST NAL
Date Deposited: 05 Aug 2008
Last Modified: 24 May 2010 09:54
URI: http://nal-ir.nal.res.in/id/eprint/4064

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