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The resistance of selected high strength alloys to embrittlement by a hydrogen environmentSelected high strength iron base and cobalt base alloys with yield strengths in the range from 1233 to 2129 MN per sq m (179 to 309 KSI) were resistant to degradation of mechanical properties in a one atmosphere hydrogen environment at ambient temperature. These alloys were strengthened initially by cold working which produced strain induced epsilon prime-hcp martensite and fcc mechanical twins in an fcc matrix. Heat treatment of the cobalt base alloy after cold working produced carbide precipitates with retention of an hcp epsilon phase which increased the yield strength level to a maximum of 2129 MN per sq m (309 KSI). High-strength alloys can be produced which have some resistance to degradation of mechanical properties by a hydrogen environment under certain conditions.
Document ID
19740057308
Acquisition Source
Legacy CDMS
Document Type
Conference Proceedings
Authors
Benson, R. B., Jr.
(North Carolina State University Raleigh, N.C., 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
Location: Champion, PA
Start Date: September 23, 1973
End Date: September 27, 1973
Accession Number
74A40058
Funding Number(s)
CONTRACT_GRANT: NGR-34-002-175
Distribution Limits
Public
Copyright
Other

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