Strength of iron under pressure up to 55 GPa from X-ray diffraction line-width analysis
- NAL
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 1.1 {+-} 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 {sigma} = 2.9+0.028P, where {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.
- Research Organization:
- Argonne National Lab. (ANL), Argonne, IL (United States). Advanced Photon Source (APS)
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 1007730
- Journal Information:
- J. Phys. Chem. Solids, Vol. 67, Issue (9-10) ; 2006; ISSN 0022-3697
- Country of Publication:
- United States
- Language:
- ENGLISH
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