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In-situ scanning electron microscope studies of crack growth in an aluminum metal-matrix compositeEdge-notched specimens of a cast and extruded Al alloy-based, alumina particulate-reinforced composite in the annealed condition were tested in situ in a SEM apparatus equipped with a deformation stage permitting the direct observation of crack growth phenomena. Fracture in this composite is seen to proceed by initiation of microcracks ahead of the macrocrack; as deformation proceeds, the microcracks lengthen, and crack propagation occurs when the region of intense plastic straining becomes comparable to the macrocrack-microcrack distance. The sequence is then repeated.
Document ID
19910033834
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Authors
Manoharan, M.
(Case Western Reserve Univ. Cleveland, OH, United States)
Lewandowski, J. J.
(Case Western Reserve University Cleveland, OH, United States)
Date Acquired
August 15, 2013
Publication Date
December 1, 1990
Publication Information
Publication: Scripta Metallurgica et Materialia
Volume: 24
ISSN: 0956-716X
Subject Category
Composite Materials
Accession Number
91A18457
Funding Number(s)
CONTRACT_GRANT: NAGW-1193
Distribution Limits
Public
Copyright
Other

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