Interfacial embrittlement in liquid-phase sintered tungsten heavy alloys

Journal Article · Wed Feb 28 23:00:00 EST 1979 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02658336· OSTI ID:6381997

Edmonds, D V ^[1]; Jones, P N

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1. Univ. of Cambridge, England

The variations in toughness of the liquid-phase sintered heavy alloys W--Ni--Fe and W--Ni--Cu have been examined. Toughness was found to be controlled primarily by the strength of the tungsten particle-matrix interfaces, which is sensitive to the rate of cooling from the sintering temperature. Furnace-cooling led to the embrittlement of these interfaces; in the case of W--Ni--Fe transmission electron microscopy identified interfacial precipitation of a W(NiFe) intermetallic compound, and in W--Ni--Cu Auger electron spectroscopy indicated interfacial segregation of the trace elements phophorus and sulfur. This embrittlement was effectively reduced by solution treating beneath the sintering temperature and quenching.

• OSTI ID: 6381997
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 10:3; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
654002 -- Radiation & Shielding Physics-- Shielding Calculations & Experiments-- (-1987)
73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ALLOYS
CHARPY TEST
CHEMICAL COMPOSITION
COPPER ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
EMBRITTLEMENT
FABRICATION
FRACTURE PROPERTIES
HEAT TREATMENTS
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NONMETALS
PHOSPHORUS
SEGREGATION
SHIELDING
SINTERING
SULFUR
SURFACES
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS