Accession Number : AD0283058

Title :   CONTROL SURFACES - LOW TEMPERATURE BRAZE MATERIAL - EVALUATION OF

Corporate Author : GENERAL DYNAMICS/FORT WORTH TEX

Personal Author(s) : PRATT,W.M.

Report Date : JUL 1962

Pagination or Media Count : 1

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)

Descriptors :   *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

Distribution Statement : APPROVED FOR PUBLIC RELEASE