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Plane strain fracture toughness tests on 2.4 and 3.9-inch-thick maraging steel specimens at various yield strength levels.Tests of bend and compact specimens were conducted according to ASTM Tentative Method E 399-70T on a 200 grade maraging steel over a range of yield strengths from 123 to 234 ksi. The toughness of any given yield strength level was greater for the overaged condition than for the underaged. Some results which met the specimen size requirements of the method were distinctly lower than corresponding results from larger specimens. Inconsistencies in both validation and invalidation of results by the requirement for linearity of the test record were also noted.
Document ID
19720049651
Document Type
Reprint (Version printed in journal)
Authors
Fisher, D. M.
Repko, A. J. (NASA Lewis Research Center Strength of Materials Branch, Cleveland, Ohio, United States)
Date Acquired
August 6, 2013
Publication Date
June 1, 1972
Publication Information
Publication: Journal of Materials
Volume: 7
Subject Category
MATERIALS, METALLIC
Distribution Limits
Public
Copyright
Other