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Damage Mechanisms around Hardness Indentations in Ti 3 SiC 2
Author(s) -
ElRaghy Tamer,
Zavaliangos Antonios,
Barsoum Michel W.,
Kalidindi Surya R.
Publication year - 1997
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.1151-2916.1997.tb02861.x
Subject(s) - indentation , materials science , composite material , vickers hardness test , indentation hardness , deflection (physics) , scanning electron microscope , microstructure , nanoindentation , optics , physics
Microstructural observations of damage around indentations in Ti 3 SiC 2 are presented. The Vickers hardness decreased with increasing load and asymptotically approached 4 GPa at the highest loads. No indentation cracks were observed even at loads as high as 300 N. Preliminary strength versus indentation plots indicate that, at least for the large‐grained material (is approximately100 μm) studied here, Ti 3 SiC 2 is a damage‐tolerant material able to contain the extent of microdamage to a small area around the indent. The following multiple energy‐absorbing mechanisms have been identified from scanning electron micrographs of areas in the vicinity of the indentation: diffuse microcracking, delamination, crack deflection, grain push‐out, grain pull‐out, and the buckling of individual grains.