Energy calibration and full-pattern refinement for strain analysis using energy-dispersive and monochromatic X-ray diffraction

Journal article

Precise channel-to-energy conversion is very important in full-pattern refinement in energy-dispersive X-ray diffraction. Careful examination shows that the channel-to-energy conversion is not entirely linear, which presents an obstacle to obtaining accurate quantitative data for lattice strains by pattern refinement. In order to establish an accurate quadratic channel-to-energy conversion function, a Matlab program was written to find the best quadratic coefficient and hence the whole energy conversion function. Then this energy conversion function was used to perform a whole-pattern fitting of the energy-dispersive X-ray diffraction pattern of a Ti64 sample. The strain across the Ti64 bar calculated from the fitting results has been compared with values obtained by single-wavelength X-ray diffraction utilizing a Laue monochromator. © 2005 International Union of Crystallography.

Authors: Liu, J; Kim, K; Golshan, M; Laundy, D; Korsunsky, A

• Publication status: Published
• Peer review status: Peer reviewed
• Publisher: Wiley-Blackwell
• Journal: JOURNAL OF APPLIED CRYSTALLOGRAPHY
• Volume: 38
• Issue: 4
• Pages: 661-667
• Publication date: 2005-08-01
• DOI: 10.1107/S0021889805016663
• ISSN: 0021-8898
• Language: English
• Keywords: strain analysis; full-pattern refinement; energy conversion; energy-dispersive X-ray diffraction; alloys
• Subjects: Engineering and allied sciences