Rhenium alloying of tungsten heavy alloys

Technical Report · Sun Jan 01 04:00:00 EST 1989

OSTI ID:5422762

German, R M; Bose, A; Jerman, G

Alloying experiments were performed using rhenium additions to a classic 90 mass % tungsten heavy alloy. The mixed-powder system was liquid phase sintered to full density at 1500 C in 60 min The rhenium-modified alloys exhibited a smaller grain size, higher hardness, higher strength, and lower ductility than the unalloyed system. For an alloy with a composition of 84W-6Re-8Ni-2Fe, the sintered density was 17, 4 Mg/m{sup 3} with a yield strength of 815 MPa, tensile strength of 1180 MPa, and elongation to failure of 13%. This property combination results from the aggregate effects of grain size reduction and solid solution hardening due to rhenium. In the unalloyed system these properties require post-sintering swaging and aging; thus, alloying with rhenium is most attractive for applications where net shaping is desired, such as by powder injection molding.

• Research Organization: Rensselaer Polytechnic Inst., Troy, NY (USA). Dept. of Materials Engineering
• OSTI ID: 5422762
• Report Number(s): AD-A-211099/7/XAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CHEMICAL REACTIONS
CRYSTAL STRUCTURE
DENSITY
DISPERSIONS
DUCTILITY
ELONGATION
FABRICATION
GRAIN SIZE
HARDENING
HARDNESS
MECHANICAL PROPERTIES
METALLURGY
MICROSTRUCTURE
MIXING
MIXTURES
PHYSICAL PROPERTIES
POWDER METALLURGY
POWDERS
REDUCTION
RHENIUM ALLOYS
SHAPE
SINTERING
SIZE
SOLID SOLUTIONS
SOLUTIONS
TENSILE PROPERTIES
TUNGSTEN ALLOYS