THE TENSILE PROPERTIES OF NIOBIUM
Technical Report
·
OSTI ID:4331787
The tensile properties of 1/8-in. thick annealed niobium sheet were measured over the temperature range 20 to 500 deg C. Strip. 0.04-in. thick, obtained by cold rolling 1/8-in. thick annealed niobium sheet, was tensile tested in the cold-worked and annealed conditions. Results show that niobium retains its strength up to 500 deg C, while the eloagation deereases to a minunum at 500 deg C. It was found that production niobium is susceptible to strain aging at temperatures above 350 deg C. The effect of surface oxidation oa the ultimate tensile strength of niobium was examined and results reported on the tensile properties of niobium-oxygen alloys. Surface oxidation, at the times and temperatures considered, does not alter the room-temperature tensile strength, while oxygen in solution in niobium increases the ultimate tensile strength and emphasizes the brittle nature of fracture at 500 deg C. (auth)
- Research Organization:
- United Kingdom Atomic Energy Authority. Industrial Group. Culcheth Labs., Culcheth, Lancs, England
- NSA Number:
- NSA-13-000753
- OSTI ID:
- 4331787
- Report Number(s):
- IGR-TN/C-583
- Country of Publication:
- Country unknown/Code not available
- Language:
- English
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