Effect of aging on the general corrosion and stress corrosion cracking of uranium--6 wt % niobium alloy

Technical Report · Sat Nov 01 00:00:00 EST 1975

DOI:https://doi.org/10.2172/4118307· OSTI ID:4118307

Koger, J W; Ammons, A M; Ferguson, J E

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 (Y-12), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-33-012574
• OSTI ID: 4118307
• Report Number(s): Y-1999
• Resource Relation: Other Information: Orig. Receipt Date: 30-JUN-76
• Country of Publication: United States
• Language: English

Related Subjects

N50210* -Metals
Ceramics
& Other Materials-Metals & Alloys-Corrosion & Erosion & Surface Phenomena
N50230 -Metals
Ceramics
& Other Materials-Metals & Alloys-Properties
Structure & Phase Studies
360105* -Materials-Metals & Alloys-Corrosion & Erosion
*NIOBIUM ALLOYS- STRESS CORROSION
*URANIUM BASE ALLOYS- STRESS CORROSION
AGING
AQUEOUS SOLUTIONS
BINARY ALLOY SYSTEMS
CHLORIDES
CRACKS
HIGH TEMPERATURE
TIME DEPENDENCE