BERYLLIUM JOINING RAD SPONSORED PROGRAM. Period covered: July 1958 to October 1959
New brazing techniques are described for joining Be to itseIf. A Be/sup 20/ at.% Ag brazing alloy is shown to yield joint strengths at room temperature of 60% (30,000 psi) of that of the base metal. At 700 to 1450 deg F, the joint strength is 80% that of the base metal. Twenty-four hour exposures at these temperatures did not affect the room temperature strength. Similar strengths are achieved by brazing with pure Ag, if a continuous interface of Ag in the joint is absent. This is readily accomplished by heat treatment because of the rapid intergranular penetration of Ag into Be. The resulting thick joint is not deleterious, since it is shown that a two phase Ag-Be alloy with a Ag network is ductile. As in the above ease, long time exposure (24 hrs) at temperatures above 1300 deg F did not affect the room temperature joint strength. Spreading of liquid Ag on Be is not appreciable, probably because of its rapid intergranular penetration. (auth)
- Research Organization:
- Avco Corp. Research and Advanced Development Div., Wilmington, Mass.
- DOE Contract Number:
- AF33(616)-5913
- NSA Number:
- NSA-14-018148
- OSTI ID:
- 4147167
- Report Number(s):
- WADC-TR-59-695(Pt.I)
- Resource Relation:
- Other Information: Project title: METALLIC METALS. Task title: BERYLLIUM AND BERYLLIUM ALLOYS. Orig. Receipt Date: 31-DEC-60
- Country of Publication:
- United States
- Language:
- English
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