9th Symposium on Space Nuclear Power Systems, Albuqerque, NM

Conference · Tue Jan 01 04:00:00 EST 1991

OSTI ID:6012420

English, R E

Available creep data for the refractory-metal alloys C-103 (Nb/10 percent Hf/1 percent Ti/0.7 percent Zr), ASTAR-811C (Ta/8 percent W/1 percent Re/0.7 percent Hf/0.025 percent C), W-5Re (W/5 percent Re), and W-25Re (W/25 percent Re) were correlated by the Orr-Sherby-Dorn method and extrapolated to 1 percent creep over 10 years. Useful life was specified to be 2 standard estimates of error below the mean surface through the data. Over the temperature range of 1200 to 1800 K, ASTAR-811C was found to be the strongest of these alloys. In particular, ASTAR-811C was found to have at 1800 K the same creep strength as W-25Re at 1420 K. The difference between these results and those of Horak and Booker likely devolves from the comparative lack of long-time data on tungsten alloys.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
• OSTI ID: 6012420
• Report Number(s): N-91-32165; NASA-TM--105228; E--6551; NAS--1.15:105228; CONF-920104--
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CREEP
HAFNIUM ALLOYS
MECHANICAL PROPERTIES
NIOBIUM ALLOYS
NIOBIUM BASE ALLOYS
RHENIUM ALLOYS
TANTALUM ALLOYS
TANTALUM BASE ALLOYS
TEMPERATURE EFFECTS
TITANIUM ALLOYS
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS
ZIRCONIUM ALLOYS