Influence of gaseous hydrogen on Inconel 718The embrittlement of Inconel 718 by exposure to 34.5 MN/sq m hydrogen at ambient temperature was found to be a function of both forming operation and heat treatment. The embrittlement, as measured by reduction of notch strength in hydrogen as compared to helium, was decreased by a fine-grain size and was most severe for coarse-grained structures containing a continuous or nearly continuous precipitate tentatively identified as Ni3Cb. Tests performed on unnotched specimens showed that the strain at which surface cracks initiate in 34.5 MN/sq m hydrogen was approximately 3% and was independent of prior forming operation or heat treatment.
Document ID
19740057324
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Walter, R. J.
Chandler, W. T. (Rockwell International Corp. Rocketdyne Div., Canoga Park, Calif., United States)
Date Acquired
August 7, 2013
Publication Date
January 1, 1974
Subject Category
Materials, Metallic
Meeting Information
Meeting: International Conference on the Effects of Hydrogen on Materials Properties and Selection and Structural Design