Microbeam X-ray diffraction studies of structural properties of polycrystalline metals by means of synchrotron radiation

T. Ungár, J. I. Langford, R. J. Cernik, G. Vörös, R. Pflaumer, G. Oszlányi, I. Kovács

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

A 100 μm×4 mm fine beam was applied at the 9.1 high resolution powder diffraction (HRPD) station of the CLRC Daresbury Laboratory to scan an individual grain from grain-boundary to grain-boundary in a tensile deformed coarse grain copper specimen. Diffraction profiles (θ-2θ) and rocking curves enabled a comprehensive analysis to be made of the intensity distribution around a fundamental Bragg reflection as a function of position in the specimen. The dislocation densities were found to be larger near the grain-boundary region than in the central parts of the grain. The dislocation-arrangement parameter M was found to be smaller in the grain-boundary region than in the centre of the grain, indicating an increased dipole character in the grain-boundary region. The rocking curves were wider near the grain boundaries than in the central region indicating larger misorientations between subgrains in this region at the strain level investigated here.

Original languageEnglish
Pages (from-to)81-87
Number of pages7
JournalMaterials Science and Engineering A
Volume247
Issue number1-2
Publication statusPublished - Jun 1998

Fingerprint

microbeams
Synchrotron radiation
Structural properties
synchrotron radiation
Grain boundaries
grain boundaries
Metals
X ray diffraction
diffraction
metals
x rays
curves
misalignment
Copper
stations
Diffraction
dipoles
copper
high resolution
profiles

Keywords

  • Defect structure
  • Line-profile analysis
  • Microdiffraction
  • Plastic deformation
  • X-ray peak-profile analysis

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Microbeam X-ray diffraction studies of structural properties of polycrystalline metals by means of synchrotron radiation. / Ungár, T.; Langford, J. I.; Cernik, R. J.; Vörös, G.; Pflaumer, R.; Oszlányi, G.; Kovács, I.

In: Materials Science and Engineering A, Vol. 247, No. 1-2, 06.1998, p. 81-87.

Research output: Contribution to journalArticle

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AU - Pflaumer, R.

AU - Oszlányi, G.

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