Development of the weld--braze joining process
A joining process, designated weld-brazing, was developed which combines resistance spot welding and brazing. Resistance spot welding is used to positlon and align the parts, as well as to establish a suitable faying-surface gap for brazing. Fabrication is then completed at elevated temperature by capillary flow of the braze alloy into the joint. The process was used successfully to fabricate Ti-6 Al-4 V alloy joints by using 3003 aluminium braze alloy and should be applicable to other metal-braze systems. Test results obtained on single- overlap and hat-stiffened panel specimens show that weld-brazed joints were superior in tensile shear, stress rupture, fatigue, and buckling compared with joints fabricated by conventional means. Another attractive feature of the process is that the brazed joint is hermetically sealed by the braze material, which may eliminate many of the sealing problems encountered with riveted or spot welded structures. The relative ease of fabrication associated with the weldbrazing process may make it cost effective over conventional joining techniques. (STAR)
- Research Organization:
- National Aeronautics and Space Administration, Langley Station, Va. (USA). Langley Research Center
- NSA Number:
- NSA-29-016216
- OSTI ID:
- 4365990
- Report Number(s):
- N-73-24573; NASA-TN-D-7281; L-8784
- Resource Relation:
- Other Information: Orig. Receipt Date: 30-JUN-74
- Country of Publication:
- United States
- Language:
- English
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