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Residual Stress and Grain Deformation in Extruded Polyerystalline BeO Ceramics
Author(s) -
SMITH DEANE K.,
WEISSMANN SIGMUND
Publication year - 1968
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1968.tb15948.x
Subject(s) - materials science , ceramic , residual stress , grain size , thermal expansion , deformation (meteorology) , anisotropy , grain boundary , dislocation , composite material , residual , mineralogy , stress (linguistics) , metallurgy , microstructure , geology , optics , linguistics , physics , philosophy , algorithm , computer science
Residual strain measurements on a series of sintered BeO tubes indicate that significant stresses developed during processing from the thermal expansion anisotropy. X‐ray topographic studies show that the resulting strains are preferentially located near grain and subgrain boundaries. Fine‐grained samples, 20μ and less, do not show pronounced subgrain structure and exhibit lower dislocation densities in the grain interiors than do coarse‐grained samples.