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Role of Hf and Zr in the hydrogen embrittlement of Ta and Cb alloysThe hydrogen embrittlement of aged T-111 and similar Ta and Cb alloys is characterized and the mechanisms believed responsible for the increased sensitivity of T-111 to low temperature hydrogen embrittlement after aging for 1000 hours or longer near 1040 C are described. A total of eight Ta base alloys and two Cb base alloys were investigated. The effects of pre-age annealing temperature, aging time, temperature and environment, and alloy composition on the susceptibility to hydrogen embrittlement were investigated. The primary method of determining the effects of these variables on the ductility of T-111 was by bend testing at 25 and -196 C. Fractured specimens were examined by the scanning electron microscope, electron microprobe, metallography and X-ray diffration.
Document ID
19730078854
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Stephens, J. R. (NASA Lewis Research Center Cleveland, OH, United States)
Date Acquired
September 2, 2013
Publication Date
January 1, 1973
Subject Category
Materials, Metallic
Report/Patent Number
NASA-TM-X-68293
Accession Number
73N29525
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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