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Fracture toughness of Al4%Mg/Al2O3pcomposites

Authors
Journal
Materials Science and Engineering A
0921-5093
Publisher
Elsevier
Publication Date
Volume
189
Identifiers
DOI: 10.1016/0921-5093(94)90396-4

Abstract

Abstract Fracture toughness tests were carried out on Al4%Mg/Al 2O 3 p composites containing different sizes and volume fractions of alumina particulates. The results indicated that the fracture toughness was dependent on the interparticle spacing provided the particulate size was below a critical size. The critical particle size corresponds to the situation wherein the energy release rate on particulate cracking is sufficient to trigger dynamic unstable crack extension.

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