DELAYED FAILURE HYDROGEN EMBRITTLEMENT OF ZIRCONIUM. Quarterly Report No. 3, March 15, 1962-June 14, 1962

Technical Report · Sun Jul 01 04:00:00 EDT 1962

DOI:https://doi.org/10.2172/4827173· OSTI ID:4827173

Weinstein, D; Holtz, F C

An investigation was made to determine the extent to which zirconium and zirconium alloys exhibit delayed failure (static fatigue) as caused by a combination of absorbed hydrogen and applied stress. Evaluation of susceptibility to time-dependent fracture was performed on an experimental Zr-- Al-- Sn-- Mo alloy containing 500 ppm hydrogen and the Canadian Zr-2.5Nb cladding material, as well as unalloyed zirconium and Zircaloy-2. For unalloyed zirconium and Zircaloy-2 containing up to 500 ppm hydrogen, no time-dependent fracture was observed which could be attributed to the delayed failure phenomenon; an increased grain size or 20% prior reduction by cold rolling did not significantly affect this behavior. The curve of applied stress versus time to failure for the high-strength Zr--Al-Sn-- Mo alloy containing 500 ppm hydrogen indicated susceptibility to time-dependent fracture due to hydrogen absorption. Short-time data for Zr-<2.5Nb>2 in the heat-treated condition and containing 500 ppm hydrogen indicated that this material is insensitive to delayed failure. (auth)

• Research Organization: Illinois. Inst. of Tech., Chicago. Armour Research Foundation
• NSA Number: NSA-16-025746
• OSTI ID: 4827173
• Report Number(s): ARF-2230-9
• Country of Publication: United States
• Language: English

Related Subjects

ALUMINUM ALLOYS
CANNING
COLD WORKING
DIAGRAMS
FAILURES
HEAT TREATMENTS
HYDROGEN
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
REDUCTION
ROLLING
SUSCEPTIBILITY
TENSILE PROPERTIES
TIN ALLOYS
ZIRCALOY
ZIRCONIUM
ZIRCONIUM ALLOYS