Thermomechanical processing of tantalum alloy ASTAR-811C

Conference · Fri Jan 01 04:00:00 EST 1988

OSTI ID:6887899

Sikka, V K

This paper presents preliminary results of the thermomechanical processing of scaled-up quantities of the high-strength tantalum alloy, ASTAR-811C, for the production of seamless tubing. The ASTAR-811C alloy has a nominal composition (weight percent) of W = 8, Hf = 0.75, Re = 1, and C = 0.025 with balance Ta. The alloy was developed in the 1960s at Westinghouse Electric Corporation. At the time of original development, plate and sheet were fabricated from small heats. Scale-up of ASTAR-811C to 36- and 138-kg ingots has been carried out in the past. However, no tubing was fabricated. The purpose of the present investigation was to produce scaled-up quantities of ASTAR-811C and to fabricate tubing. Melting scale-up was performed at Cabot Corporation and the Oak Ridge National Laboratory (ORNL), and the tube fabrication from scaled-up heats was carried out at ORNL. 2 refs., 3 figs., 1 tab.

• Research Organization: Oak Ridge National Lab., TN (USA)
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6887899
• Report Number(s): CONF-890103-2; ON: DE89002216
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
CARBON ADDITIONS
CHEMICAL COMPOSITION
FABRICATION
HAFNIUM ADDITIONS
HAFNIUM ALLOYS
HEAT TREATMENTS
MATERIALS WORKING
RHENIUM ALLOYS
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
THERMOMECHANICAL TREATMENTS
TUBES
TUNGSTEN ALLOYS