Accession Number:

AD0272091

Title:

MATERIALS-SANDWICH, BRAZED PH 15-7MO STAINLESS STEEL, EVALUATION OF

Descriptive Note:

Corporate Author:

GENERAL DYNAMICS/FORT WORTH TEX

Personal Author(s):

Report Date:

1962-01-17

Pagination or Media Count:

1.0

Abstract:

A study was made of the response of PH15-7 Mo to the phases of the heat treatment making up a brazing cycle for honeycomb sandwich panels. The austenite conditioning temperature was predetermined by the brazing alloy, sterling Ag plus 0.2 Li, which brazes in the 1640 to 1690 F range. The data indicated that some loss in ductility was associated with slower cooling rates. Satisfactory tensile properties were obtained by refrigeration at -20 F for 60 min. Aging precipitation hardening response was determined to be most satisfactory at 950 F for 60 min. The tensile properties resulting from this heat treatment are reported. The thicker gages, 0.020 to 0.320 in., had somewhat lower strengths and higher elongation. The converse was found for thinner gages, 0.016 to 0.005 in. The tension-tension fatigue strength of PH15-7 Mo - RH95OM compared favorably with 17-7PH - TH1050. The mechanical properties were determined for honeycomb test panels brazed with production equipment. The average results for the 0.008 in. gage skin panels were reported. Author

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Distribution Statement:

APPROVED FOR PUBLIC RELEASE