Effect of aging on the general corrosion and stress corrosion cracking of uranium--6 wt % niobium alloy
Mechanical properties of the uranium-6 wt percent niobium alloy change with aging time and temperature. In general, the ultimate tensile strength and hardness reach a peak, while elongation becomes a minimum at aging temperatures between 400 and 500$sup 0$C. The first optical evidence of a second phase was in the 400$sup 0$C-aged alloy, while complete transformation to a two-phase structure was seen in the 600$sup 0$C-aged alloy. The maximum-strength conditions correlate with the minimum stress corrosion cracking (SCC) resistance. The maximum SCC resistance is found in the as-quenched and 150, 200, and 600$sup 0$C-aged specimens. The as-quenched and 300$sup 0$C-aged specimens had the greatest resistance to general corrosion in aqueous chloride solutions; the 600$sup 0$C-aged specimen had the least resistance. (auth)
- Research Organization:
- Oak Ridge Y-12 Plant, Tenn. (USA)
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-33-012574
- OSTI ID:
- 4118307
- Report Number(s):
- Y--1999
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
*URANIUM BASE ALLOYS-- STRESS CORROSION
360105* --Materials--Metals & Alloys--Corrosion & Erosion
AGING
AQUEOUS SOLUTIONS
BINARY ALLOY SYSTEMS
CHLORIDES
CRACKS
HIGH TEMPERATURE
N50210* --Metals
Ceramics
& Other Materials--Metals & Alloys--Corrosion & Erosion & Surface Phenomena
N50230 --Metals
Ceramics
& Other Materials--Metals & Alloys--Properties
Structure & Phase Studies
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