Premium
Quantitative δ' Phase Analysis in Al–Li Alloys using the Rietveld Method
Author(s) -
PérezLandazábal J. I.,
Nó M. L.,
Madariaga G.,
San Juan J.
Publication year - 1997
Publication title -
journal of applied crystallography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.429
H-Index - 162
ISSN - 1600-5767
DOI - 10.1107/s0021889896010503
Subject(s) - rietveld refinement , materials science , texture (cosmology) , alloy , phase (matter) , diffraction , mass fraction , powder metallurgy , analytical chemistry (journal) , crystallography , metallurgy , crystal structure , chemistry , microstructure , optics , composite material , physics , computer science , chromatography , artificial intelligence , image (mathematics) , organic chemistry
Powder X‐ray diffraction and the Rietveld method have been exploited to determine quantitatively the mass fraction and the mean size evolution with aging time of the δ ′ precipitates in an Al–Li alloy at 453 K. Although obtaining good refinements is not straightforward, the principal difficulties being the texture of the sample, the small intensities of the δ ′ peaks, the coincidence of the most intensive δ ′ peaks with α peaks, and the determination of several parameters (crystallographic structure, linear absorption, texture, temperature factors) before Rietveld application in order to avoid too many free parameters, this technique has proved to be a very powerful tool in applications in physical metallurgy.