Vacuum brazing beryllium to Monel

Conference · Fri Oct 01 04:00:00 EDT 1982 · Weld. J. (Miami); (United States)

OSTI ID:6528655

Glenn, T G; Grotsky, V K; Keller, D L

The tensile strength of beryllium to Monel vacuum furnace brazed joints was studied. The filler used was the 72% Ag-28%Cu(BAg-8) alloy. The strength of these joints, which require the use of a titanium hydride powder or physical vapor deposited titanium wetting agent on the beryllium, was found to approach the yield strength of the base metals. Strength was found to be reduced by the interaction of increased titanium hydride quantity and brazing time. Metallographic and scanning electron microscope (SEM) studies correlated these effects with microstructure. The formation of the brittle copper-beryllium delta phase was found to require conditions of high brazing temperature and the presence of a reservoir of the copper-containing filler such as found in fillet areas. Two other filler metals: pure silver, and a 60% Ag-30% Cu-10%Sn (BAg-17) alloy were shown to be acceptable alternatives to the BAg-8 alloy in cases where the filler metal can be preplaced between the base metal surfaces.

• Research Organization: Rockwell International Corp., Rocky Flats Plant, Golden, CO
• OSTI ID: 6528655
• Report Number(s): CONF-820449-
• Conference Information: Journal Name: Weld. J. (Miami); (United States) Journal Volume: 61
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101 -- Metals & Alloys-- Preparation & Fabrication
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
BERYLLIUM ALLOYS
BRAZING
COPPER ALLOYS
CRYSTAL STRUCTURE
FABRICATION
FURNACES
JOINING
MECHANICAL PROPERTIES
MICROSTRUCTURE
MONEL
NICKEL ALLOYS
NICKEL BASE ALLOYS
TENSILE PROPERTIES
VACUUM FURNACES
WELDING