Interphase boundary precipitation in liquid phase sintered W-Ni-Fe and W-Ni-Cu alloys

Journal Article · Fri Jun 01 04:00:00 EDT 1984 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02644702· OSTI ID:6511156

Muddle, B C

A serious potential of embrittlement in liquid-phase sintered, tungsten-based heavy alloys is related to the precipitation of a brittle third phase along tungsten-matrix interphase boundaries. The present investigation is concerned with the identification of the phase observed to form at the tungsten-matrix interphase within a commercial W-Ni-Fe alloy containing a weight fraction Ni:Fe of 1:1. A severely embrittled sample of a commercial W-4.5 wt pct Ni-4.5 wt pct Fe alloy and heat treated specimens of a W-7.2 wt pct Ni-2.4 wt pct Cu alloy were used in a study of interphase boundary precipitation. It was possible to identify the embrittling interphase boundary precipitate formed in commercial W-4.5 wt pct Ni-4.5 wt pct Fe alloy. The interphase boundary precipitation of an intermetallic phase in W-7.2 wt pct Ni-2.4 wt pct Cu alloy under controlled conditions of heat treatment could also be confirmed. 34 references.

• Research Organization: Monash Univ., Clayton, Victoria, Australia
• DOE Contract Number: AC02-76ER01198
• OSTI ID: 6511156
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 15A; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
COPPER ALLOYS
CRYSTAL STRUCTURE
EMBRITTLEMENT
FABRICATION
GRAIN BOUNDARIES
HARDENING
IRON ALLOYS
MECHANICAL PROPERTIES
METALLURGY
MICROSTRUCTURE
NICKEL ALLOYS
POWDER METALLURGY
PRECIPITATION HARDENING
SINTERING
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS