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In-situ deformation studies of an aluminum metal-matrix composite in a scanning electron microscopeTensile specimens made of a metal-matrix composite (cast and extruded aluminum alloy-based matrix reinforced with Al2O3 particulate) were tested in situ in a scanning electron microscope equipped with a deformation stage, to directly monitor the crack propagation phenomenon. The in situ SEM observations revealed the presence of microcracks both ahead of and near the crack-tip region. The microcracks were primarily associated with cracks in the alumina particles. The results suggest that a region of intense deformation exists ahead of the crack and corresponds to the region of microcracking. As the crack progresses, a region of plastically deformed material and associated microcracks remains in the wake of the crack.
Document ID
19900023357
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 14, 2013
Publication Date
October 1, 1989
Publication Information
Publication: Scripta Metallurgica
Volume: 23
ISSN: 0036-9748
Subject Category
COMPOSITE MATERIALS
Report/Patent Number
AD-A219388
Funding Number(s)
CONTRACT_GRANT: NAGW-1193
Distribution Limits
Public
Copyright
Other