Foreword
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Foreword
There has been a considerable interest in developing new high-temperature materials in recent years. Almost all of the new material systems under current development exhibit limited ductility and low fracture toughness at ambient temperature. As a result, research activities in the area of brittle materials have grown considerably. These activities are concerned with the physics, mechanics, or material aspects of brittle fracture in ambient or aggressive environments. The Quasi-Brittle Fracture Symposium was organized to provide a f o r u m for the exchange of scientific views across the various disciplines dealing with fracture of low ductility materials. The four-session symposium was held in conjunction with the 1991 Fall Meeting of The Minerals, Metals, and Materials Society in Cincinnati, under the joint sponsorship of the A S M / M S D Flow and Fracture Committee and the TMS Mechanical Metallurgy Committee. Twenty-six presentations were given a t the symposium. To encourage discussion on work in progress, publication in the conference proceedings was not required for participation in the symposium. The nine articles published in this proceedings are good indicators of the focused areas covered in the symposium, which include fracture mechanisms, dislocation mechanisms, toughe n i n g mechanisms, interfacial and dynamic fracture, and environmental effects in brittle fracture.
Kwai S. Chan Southwest Research Institute
William W. Gerberich University of Minnesota Symposium Organizers
METALLURGICAL TRANSACTIONS A
VOLUME 24A, MARCH 1993--521
