Abstract
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 widemore » temperature range above 0.5 T/sub m/ (melting temperature in Kelvin) and examine the strengthening effect of HfC.« less
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.