Effect of extrusion parameters on consolidation of tungsten-hafnium and tungsten-steel powders [electronic resource].
- Washington, D.C. : United States. Dept. of Defense, 1994.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
- Physical Description:
- 24 pages : digital, PDF file
- Additional Creators:
- Oak Ridge National Laboratory, United States. Department of Defense, and United States. Department of Energy. Office of Scientific and Technical Information
- Restrictions on Access:
- Free-to-read Unrestricted online access
- Purpose of this study was to evaluate the fabrication of tungsten-steel and tungsten-hafnium composite materials by hot extrusion of canned powders. The W-28 wt % Hf composite was consolidated by extrusion of blended powders with preheat temperatures over the temperature range of 1100 to 1400 C. Materials were fully dense and exhibited substantial elongation of the tungsten phase within the hafnium matrix, which was further elongated by re-extrusion. The flow stress, as characterized by the extrusion constant, decreased with increasing temperature up to 1300 C and increased substantially at 1400 C as significant quantities of intermetallic phase were formed during preheating. A mixture of tungsten powder with 10 wt % steel powder was consolidated to full density by hot extrusion at a 1600 C preheat temperature and a reduction ratio of 4.2. Microstructures were found to be essentially fully recrystallized at 1300 C preheat and to be partially recrystallized at lower preheat temperatures.
- Report Numbers:
- E 1.99:conf-940521--1
- Published through SciTech Connect.
International mining trade show and 96th annual meeting of the Canadian Institute of Mining, Metallurgy and Petroleum, Toronto, ON (Canada), 1-4 May 1994.
E. K. Ohriner; V. K. Sikka; D. Kapoor.
- Funding Information:
View MARC record | catkey: 24505724