CONTROL SURFACES - LOW TEMPERATURE BRAZE MATERIAL - EVALUATION OF

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Abstract:

An investigation was made to select a brazing alloy for use in the repair brazing of 17-7 PH honeycomb sandwich panels and to determine the extent of damage to the strength of the heat treated panels, caused by the localized repair brazing temperature. A brazing alloy consisting of 97 Ag and 3 Li, Ni plated, gave the most satisfactory brazed joints. The use of this brazing alloy, with the repair method developed, enabled reproducible repairs to be made on 17-7 PH honeycomb sandwich panels. The yield strength of heat treated 17-7 PH stainless steel in the area of the braze was reduced to approximately 40 to 45 of the original TH 1050 value, and the ultimate strength was reduced to 65 to 70. The elongation was almost doubled. Preliminary tests indicate this strength loss may be partly offset by other factors and scheduled testing will determine the extent of damage to the repair area. Author

Author(s):
Pratt, W. M.
Author Organization(s):
GENERAL DYNAMICS/FORT WORTH TEX
Pagination:
0001

Security Markings

DOCUMENT & CONTEXTUAL SUMMARY

Distribution:
Approved For Public Release

RECORD

Collection: TR
Identifying Numbers
Report Number(s):
FGT 2088
Contract/Grant Number(s):
AF 33(600)-36200, AF 33(657)-7248
 Subject Terms
Joint Capability Areas:
JCA_4.3_Maintain
Communities of Interest:
No COI(s) Identified
Descriptor(s):
*STAINLESS STEEL, CALIFORNIUM, CONTROL SURFACES, ELASTIC PROPERTIES, FOILS(MATERIALS), HEAT TREATMENT, HONEYCOMB CORES, LITHIUM ALLOYS, MAINTENANCE, MECHANICAL PROPERTIES, PROCESSING, SANDWICH PANELS, SILVER ALLOYS, SILVER SOLDERS, TENSILE PROPERTIES
Keyword(s):
*STEEL 1050
Report Date:
1962 Jul 01