PROCESSING AND EVALUATION OF PRE-PRODUCTION QUANTITIES OF COLUMBIUM ALLOY SHEET. Final Report, January 24, 1963-January 15, 1964

Technical Report · Mon Jan 20 04:00:00 EST 1964

OSTI ID:4038861

Nadler, R A

Single 300-lb, 6-in. dia ingots of FS-85 (Nb-27Ta-10W1Zr) and B-66 (Nb- 5Mo-5V-1Zr) were converted to 0.050 in. by 18 in. wide sheet and evaluated with respect to mechanical properties and weldability. The yields from ingot to sheet were 46% for B-66 and 50% for FS-85. FS-85 was judged to be the more fabricable alloy and this was attributed to its lower strength. The quality of the sheet produced was equivalent for the two alloys except that better flatness was achieved for FS-85. The tensile strengih and stress-rupture behavior of B-66 was superior to that of FS-85 up to 2400 deg F. This superiority is greatly magnified when comparisons are made on a strength: density basis, as FS-85 is 25% more dense than B-66. Base metal bendability was less than 1T for both alloys. FS-85 had a 4T bend transition temperature of -250 deg F as compared to - 100 deg F for B-66. The as-welded ductility of FS-85 was superior to that of B-66, although welds of the latter alloy had good ductility at room temperature for the high strengths exhibited by the alloy. Despite diffe rences in base metal transition temperature, both alloys had a weld metal transition temperature of 50 deg F. Post-weld anneals reduced the bend transition temperature of FS-85 to 0 to - 100 deg F, but progressively raised the transition temperature for B-66, apparently as a consequence of aging during annealing. (auth)

• Research Organization: Westinghouse Electric Corp. Materials Mfg. Div., Blairsville, Penna.
• NSA Number: NSA-18-018292
• OSTI ID: 4038861
• Report Number(s): N63-20341
• Country of Publication: United States
• Language: English

Related Subjects

ANNEALING
DUCTILITY
FAILURES
HEAT TREATMENTS
HIGH TEMPERATURE
LOW TEMPERATURE
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NIOBIUM ALLOYS
SHEETS
STRESSES
TANTALUM ALLOYS
TEMPERATURE
TENSILE PROPERTIES
TUNGSTEN ALLOYS
VANADIUM ALLOYS
WELDING
WELDS
ZIRCONIUM ALLOYS