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This paper reviews the background to the formation of a Working Group in the United Kingdom concerned with fracture testing of high-strength metallic materials. The results are given of two collaborative test programs designed to familiarize participants with testing techniques based on linear elastic fracture mechanics and interpretation of load-displacement curves.
Results also are presented of specific studies on the influence of fatigue precracking stress intensity and the specimen dimensions such as thickness and crack length on KIc measurement.
The current objectives of the BISRA Fracture Toughness (High Strength steels) Committee are to produce a British standard for plane strain fracture toughness (KIc) testing and prove its workability by a further collaborative test program.
fractures (materials), toughness, fracture strength, interlaboratory tests, evaluation, tests
Head of the Mechanical Testing, The Inter-Group Laboratories of the British Steel Corp. (BISRA), Sheffield,