The Effects of Hydrogen on the Mechanical Properties and Fracture of Zr and Refractory Metals.

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Abstract:

The effect of hydrogen on the mechanical properties of zirconium and the refractory metals is reviewed with particular attention to the effects on fracture and ductility. The various mechanisms proposed for the hydrogen embrittlement of these metals is reviewed. Both the effects of hydrogen in solution and in the surrounding gas phase is considered. New results on the embrittlement of Nb and Nb-N alloys obtained using a variety of experimental techniques is presented and discussed relative to the generic embrittlement phenomena in these metals. The relation of the crack propagation mechanism to stress and temperature induced phase changes is discussed and a model of hydrogen embrittlement is put forth. Modified author abstract

Author(s):
Birnbaum, H. K. ; Grossbeck, M. ; Gahr, S.
Author Organization(s):
ILLINOIS UNIV URBANA DEPT OF METALLURGY AND MINING ENGINEERING
Descriptive Note:
Technical rept.,
Pagination:
0027

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Contract/Grant Number(s):
N00014-67-A-0305-0020
 Subject Terms
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*Refractory metals, *Hydrogen embrittlement, *Zirconium, Fracture(Mechanics), Niobium, Tantalum, Vanadium, Molybdenum, Tungsten, Chromium, Hydrogen, Hydrides, Reviews, Crack propagation, Temperature, Stresses
Field(s)/Group(s):
Metallurgy and Metallography
Report Date:
1973 Nov 01