Accession Number : ADA310966

Title :   Surface Treatment Effects on Aermet 100 Steel: Part 1. Shot Peening Effect on Corrosion and Fatigue of Aermet 100 Steel.

Descriptive Note : Technical rept. Oct 94-Feb 96,

Corporate Author : NAVAL AIR WARFARE CENTER AIRCRAFT DIV PATUXENT RIVER MD

Personal Author(s) : Lee, Eun U. ; Tenney, Darrel R., Jr

PDF Url : ADA310966

Report Date : 12 APR 1996

Pagination or Media Count : 26

Abstract : This study was conducted to identify the effect of shot peening on the corrosion and fatigue behavior of AerMet 100 steel. The specimens were shot-peened with hard cast steel shot, and the induced residual stress profile was determined with the aid of X-ray diffraction. Subsequently, the specimens were undergone to direct tension stress corrosion and immersion corrosion in an aqueous 3.5% NaC1 solution, salt spray corrosion in two separate fog chambers for atomized aqueous 5% NaC1 solution with and without SO2 gas, and fatigue test in a laboratory environment. The shot peening induced a residual compressive stress 1,130 MPa at 0.03 mm depth in the specimen. The shot peening did not change the susceptibility of AerMet 100 steel to stress corrosion, but reduced the resistance to immersion corrosion and salt spray corrosion. This unfavorable effect is associated with the surface cold work and greater exposure area generated by the shot peening process. On the other hand, the shot peening extended the fatigue life of AerMet 100 steel.

Descriptors :   *CORROSION, *SURFACE FINISHING, *STEEL, *FATIGUE(MECHANICS), *SHOT PEENING, ENVIRONMENTS, EXPOSURE(GENERAL), X RAY DIFFRACTION, PROFILES, SURFACE PROPERTIES, FOG, TENSION, STRESS CORROSION, SODIUM CHLORIDE, IMMERSION, CHAMBERS, FATIGUE TESTS(MECHANICS), CASTINGS, COMPRESSIVE PROPERTIES, SALT WATER, COLD WORKING, SALT SPRAY TESTS.

Subject Categories : Fabrication Metallurgy
      Inorganic Chemistry
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE