DEVELOPMENT OF NIOBIUM-BASE ALLOYS FOR USE IN A NUCLEAR SUPERHEATER. Quarterly Progress Report, October-December 1962
The development and evaluation of niobium-base alloys resistant to 1000 to 1300 deg F steam for structural or cladding applications in a nuclear superheater are discussed. Thirty-nine experimental alloys containing aluminum, iron, molybdenum, titanium, vanadium, and zirconium were exposed to 1000 deg F 1500-psi steam for 56 days. The addition of titanium and vanadium appeared to be beneficial to corrosion resistance while aluminum, iron, molybdenum, and zirconium were not. The value of the addition of chromium was uncertain. A second series of binary niobium alloys containing titanium and vanadium, and of ternary and quaternary alloys containing chromium, molybdenum, titanium, and vanadium were prepared and are currently being tested. Comparison of the corrosion behavior of cold-worked and annealed alloys indicated that cold work (90 per cent reduction in thickness) increases the corrosion resistance of niobium alloys. The addition of either molybdenum or vanadium to niobium appeared beneficial when the alloys are cold worked. For cold-worked alloys containing vanadium and/or titanium, the addition of 6 to 9 at. % chromium appeared to impart improved corrosion resistance. One alloy (niobium-21 at. % titanium-12 at. % vanadium-9 at. % chromium) exhibited a weight gain of only 116 mg per dm/sup 2/ after 56 days of exposure to 1000 deg F steam. Sixteen additional alloys containing chromium, molybdenum, titanium, and vanadium were prepared to study the effects of these additions on the corrosion resistance of niobium more fully. (auth)
- Research Organization:
- Battelle Memorial Inst., Columbus, Ohio
- DOE Contract Number:
- W-7405-ENG-92
- NSA Number:
- NSA-17-014764
- OSTI ID:
- 4756982
- Report Number(s):
- BMI-X-10030; EURAEC-546
- Resource Relation:
- Other Information: Work Performed under United States-Euratom Joint Research and Development Program. Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
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DEVELOPMENT OF NIOBIUM-BASE ALLOYS FOR USE IN A NUCLEAR SUPERHEATER. Quarterly Progress Report for October-December 1963
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Related Subjects
ALUMINUM ALLOYS
CHROMIUM ALLOYS
COATING
COLD WORKING
CORROSION
HIGH TEMPERATURE
IRON ALLOYS
MACHINE PARTS
MATERIALS TESTING
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
PREPARATION
REACTORS
STABILITY
STEAM
SUPERHEATING
TITANIUM ALLOYS
VANADIUM ALLOYS
WEIGHT
ZIRCONIUM ALLOYS