Tensile properties of tungsten-3. 6% rhenium-0. 4% hafnium carbide above 0. 5 T/sub m/

Journal Article · Wed Mar 01 04:00:00 EST 1989 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(89)90389-X· OSTI ID:5764924

Luo, A; Jacobson, D L; Shin, K S

In recent years, there has been a renewal of interest in the development of tungsten-base alloys and fibers as future aerospace propulsion and space power systems place over increasing demands on materials with high-temperature capability. For example, tungsten-base alloys are expected to be used as emitter materials in a future space power system and tungsten fiber-reinforced composites are being developed for future aerospace systems. Among various alloying elements for tungsten, rhenium has been found to be one of the most effective alloying elements because the addition of rhenium to tungsten increases not only high-temperature strength but low-temperature ductility. It has been reported that the optimum concentration of rhenium in tungsten is about 4 at.% or greater than 20 at.% to provide optimum ductilizing effect. In order to improve high-temperature strength, second-phase strengthening has also been utilized in the development of tungsten-base alloys. Among various potential second-phase particles, hafnium carbide (HfC) was found to be one of the most effective particles to improve high-temperature strength of tungsten because of its high melting temperature and thermodynamic stability. The main objective of the present paper is to report the tensile properties of a W-3.6 at.% Re-0.4 mol % HfC alloy for a wide temperature range above 0.5 T/sub m/ (melting temperature in Kelvin) and examine the strengthening effect of HfC.

• Research Organization: Arizona Univ., Tucson, AZ (USA). Dept. of Chemical Engineering
• OSTI ID: 5764924
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 23:3; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360103 -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
360204 -- Ceramics
Cermets
& Refractories-- Physical Properties
ALLOYS
CARBIDES
CARBON
CARBON COMPOUNDS
DUCTILITY
ELEMENTS
FABRICATION
HAFNIUM CARBIDES
HAFNIUM COMPOUNDS
HIGH TEMPERATURE
MECHANICAL PROPERTIES
MELTING POINTS
METALS
NESDPS Office of Nuclear Energy Space and Defense Power Systems
NONMETALS
PHASE STUDIES
PHYSICAL PROPERTIES
REFRACTORY METAL COMPOUNDS
RHENIUM
TENSILE PROPERTIES
THERMODYNAMIC PROPERTIES
THERMODYNAMICS
TRANSITION ELEMENT COMPOUNDS
TRANSITION ELEMENTS
TRANSITION TEMPERATURE
TUNGSTEN ALLOYS