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Anisotropic microstrain broadening in cementite, Fe 3 C, caused by thermal microstress: comparison between prediction and results from diffraction‐line profile analysis
Author(s) -
Leineweber A.
Publication year - 2012
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/s0021889812036862
Subject(s) - cementite , anisotropy , materials science , crystallite , diffraction , thermal , shrinkage , x ray crystallography , line (geometry) , powder diffraction , composite material , crystallography , optics , metallurgy , thermodynamics , microstructure , chemistry , geometry , austenite , physics , mathematics
X‐ray powder diffraction data of an Fe 3 C powder consisting of polycrystalline particles shows pronouncedly anisotropic microstrain broadening of the Bragg reflections. The extent and anisotropy of the broadening can quantitatively be attributed to thermal microstresses induced by anisotropic thermal shrinkage from the preparation temperature of 873 K to the ambient analysis temperature, in conjunction with the elastic anisotropy of Fe 3 C.