Accession Number : AD0480836

Title :   EVALUATION OF FATIGUE LIFE OF CHROME-ITE PLATED SPECIMENS.

Descriptive Note : Final rept. for period ending 20 Aug 65,

Corporate Author : GENERAL DYNAMICS SAN DIEGO CA CONVAIR DIV

Personal Author(s) : Smith, Clarence R.

Report Date : DEC 1965

Pagination or Media Count : 33

Abstract : Test data are presented comparing fatigue lives of notched and unnotched aluminum alloy specimens with and without being coated by a thin electrodeposited coating called Chrome-ite. Data indicate that a substantial improvement in fatigue strength can be attained through use of Chrome-ite if cyclic stressing is confined to regions well below the proportional limit of the material. High preloads or cycling at high stresses might eliminate benefits altogether or cause detrimental effects in some cases. The fact that losses are not always accompanied by high loading indicates the need for further research on the Chrome-ite process. (Author)

Descriptors :   *COATINGS), (*CHROMIUM, (*ELECTRODEPOSITION, CHROMIUM), ALUMINUM ALLOYS, STRESSES, FATIGUE(MECHANICS), PERFORMANCE(ENGINEERING), DENSITY, THICKNESS, STRAIN(MECHANICS), TEST EQUIPMENT, SALT SPRAY TESTS, TENSILE PROPERTIES, NOTCH SENSITIVITY, CORROSION INHIBITION, HARDNESS, PHOTOMICROGRAPHY, EXPERIMENTAL DATA, TABLES(DATA).

Subject Categories : Coatings, Colorants and Finishes
      Properties of Metals and Alloys

Distribution Statement : APPROVED FOR PUBLIC RELEASE