THE DEVELOPMENT OF REFRACTORY-METAL BRAZING ALLOYS FOR ELEVATED-TEMPERATURE SERVICE
BS>From Technical Conference on Applied Aspects of Refractory Metals, Los Angeles, Dec. 1963. In order to advance the existing technology of refractorymetal fabrication, a development program is under way to produce brazing alloys for joining the refractory materials for service up to 3500 deg F. The program has been conducted in two phases: the development of brazing alloys for service (1) to 1700 deg F and (2) to 3500 deg F. The first phase of the brazing alloy development program started with the formulation and testing of a large number of zirconium- and titanium-base ternary alloys. After preliminary studies concerned with the alloy wettability and flowability on refractory metals, the most promising alloys were evaluated through thermal cycling and aging tests and mechanical shear strength determinations. The results indicated that the alloy compositions, 48Zr--48Ti--4Be and 75Zr-- 19Cb-6Be (wt%), are particularly promising for a wide variety of joining operations on refractory materials at service temperatures up to 1700 deg F. The second phase of the alloy development program is currentiy in the preliminary stages. Initial investigations indicate that the ternary alloy systems of Cb-- Ta-- V and Ti-- Ta- - V appear very promising for service in the higher temperature range. Current results reveal that alloys from these systems, which melt in the range of 3000 to 3700 deg F, exhibit excellent wettability and flowability on the refractory materials and produce extremely ductile joints at room temperature. Additional testing will be performed to determine the properties of joints brazed with these and other alloys at temperatures up to 3500 deg F. (auth)
- Research Organization:
- Oak Ridge National Lab., Tenn.
- DOE Contract Number:
- W-7405-ENG-26
- NSA Number:
- NSA-18-014421
- OSTI ID:
- 4085435
- Report Number(s):
- CONF-373-4
- Resource Relation:
- Other Information: From Technical Conference on Applied Aspects of Refractory Metals, Los Angeles, Dec. 1963. Orig. Receipt Date: 31-DEC-64
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
BERYLLIUM ALLOYS
BRAZING
DUCTILITY
FABRICATION
HEAT TREATMENTS
HIGH TEMPERATURE
IMPREGNATION
JOINTS
MATERIALS TESTING
MECHANICAL PROPERTIES
MELTING
NIOBIUM ALLOYS
PLANNING
REFRACTORIES
SURFACE TENSION
TANTALUM ALLOYS
TENSILE PROPERTIES
TITANIUM ALLOYS
VANADIUM ALLOYS
ZIRCONIUM ALLOYS