SYMPOSIA PAPER Published: 01 January 1993

Fracture Toughness Evaluation of Neutron-Irradiated Composites by a Miniaturized Charpy Test


The impact properties of advanced metal matrix composites (MMCs) such as unidirectionally reinforced silicon carbide (SiC)/aluminum (Al) and C/Al have been investigated based on recent improvements in their mechanical properties. This paper details the effects of test temperature and neutron irradiation on the fracture toughness of these MMCs. The materials used were sheets of PCS-SiC/Al and PAN-C/Al. Miniaturized Charpy V-notched specimens were tested in an instrumented Charpy impact tester. Neutron irradiation was performed in the Japanese Materials Testing Reactor (JMTR), a light water reactor (LWR) at Oarai. The fracture energy increased with increasing test temperature and with neutron irradiation. SiC/Al was rather more insensitive to neutron fluence than C/Al, which was related to the difference in interfacial structure between the two systems.

Author Information

Hamada, K
The University of Tokyo, Tokyo, Japan
Sato, S
The University of Tokyo, Tokyo, Japan
Kohyama, A
The University of Tokyo, Tokyo, Japan
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Developed by Committee: E10
Pages: 77–89
DOI: 10.1520/STP12722S
ISBN-EB: 978-0-8031-5250-2
ISBN-13: 978-0-8031-1869-0