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Conference Article: Fracture toughness of Alloy 800 H at room temperature

Krompholz, K.; Ullrich, G.; Alder, H.P. (Paul Scherrer Inst. (PSI), Wuerenlingen (Switzerland)); Gnirss, G. (Asea Brown Boveri AG, Mannheim (Germany, F.R.)); Huthmann, H. (Internationale Atomreaktorbau GmbH (INTERATOM), Bergisch Gladbach (Germany, F.R.)); Roedig, M.; Schubert, F. (Kernforschungsanlage Juelich GmbH (Germany, F.R.). Inst. fuer Reaktorwerkstoffe)

Abstract

The objective of this work is to compare and assess equipment, test methods, and evaluation procedures being used for J-integral fracture mechanics testing. Long-range objectives are to recommend testing procedures, to improve confidence in test data, and to provide a basis for future programs. From the point of view that single specimen techniques revealed relatively large scatter by comparing test data from different laboratories, in this contribution an evaluation according to the multi specimen technique is presented applying different evaluation procedures. These results are compared with those obtained by the single specimen techniques (d.c. potential drop technique). From that a recommendation for the application of the ASTM designations to the J-R curve for Alloy 800 H is presented.

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key words: Gas Cooled Reactor, Nuclear Technology
Reference:
High temperature metallic materials for gas-cooled reactors. Proceedings of a specialists meeting held in Cracow, 20-23 June 1988
International Atomic Energy Agency, Vienna (Austria). International Working Group on Gas-Cooled Reactors
IWGGCR--18, pp:153-162