Tensile and creep rupture behavior of P/M processed Nb-base alloy, WC-3009

Conference · Thu Sep 01 00:00:00 EDT 1988

OSTI ID:5576317

Hebsur, M G; Titran, R H

Due to its high strength at temperatures up to 1600 K, fabrication of niobium base alloy WC-3009 (Nb30Hf9W) by traditional methods is difficult. Powder metallurgy (P/M) processing offers an attractive fabrication alternative for this high strength alloy. Spherical powders of WC-3009 produced by electron beam atomizing (EBA) process were successfully consolidated into a one inch diameter rod by vacuum hot pressing and swaging techniques. Tensile strength of the fully dense P/M material at 300-1590 K were similar to the arc-melted material. Creep rupture tests in vacuum indicated that WC-3009 exhibits a class 1 solid solution (glide controlled) creep behavior in the 1480 to 1590 K temperature range and stress range of 14 to 70 MPa. The creep behavior was correlated with temperature and stress using a power law relationship. The calculated stress exponent n, was about 3.2 and the apparent activation energy, Q, was about 270 kJ/mol. The large creep ductility exhibited by WC-3009 was attributed to its high strain rate sensitivity.

• Research Organization: National Aeronautics and Space Administration, Cleveland, OH (USA). Lewis Research Center
• OSTI ID: 5576317
• Report Number(s): N-89-19371; NASA-TM-101954; E-4311; NAS-1.15:101954; CONF-8809322-; TRN: 89-028840
• Resource Relation: Conference: TMS fall meeting, Chicago, IL (USA), 25-30 Sep 1988
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
HAFNIUM ALLOYS
FABRICATION
TENSILE PROPERTIES
NIOBIUM BASE ALLOYS
TUNGSTEN ALLOYS
CREEP
EXPERIMENTAL DATA
HOT PRESSING
POWDER METALLURGY
STRAIN RATE
ALLOYS
DATA
INFORMATION
MATERIALS WORKING
MECHANICAL PROPERTIES
METALLURGY
NIOBIUM ALLOYS
NUMERICAL DATA
PRESSING
360103* - Metals & Alloys- Mechanical Properties