Accession Number : ADA321866

Title :   Corrosion Fatigue of AerMet 100 Steel.

Descriptive Note : Rept. from Oct 94-Mar 96,

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

Personal Author(s) : Lee, Eun U.

PDF Url : ADA321866

Report Date : 09 JUL 1996

Pagination or Media Count : 29

Abstract : This study was undertaken to characterize and understand the fatigue behavior of AerMet 100 steel under loading with stress ratio 0.1 and load frequencies of 0.1, 1, and 10 Hz in gaseous dry nitrogen, distilled water, and aqueous 3.5% NaCI solution at ambient temperature. The influence of environmental factor on near-threshold crack growth was also investigated. The environment assisted fatigue crack growth was faster for a more aggressive environment and a lower load frequency in high AK region. The environment induced crack closure was greater and the fatigue crack growth was slower for a more aggressive environment in low AK or near-threshold crack growth region. The corrosion fatigue crack path was partly intergranular and partly transgranular.

Descriptors :   *CRACKS, *STEEL, *FATIGUE(MECHANICS), *STRESS CORROSION, TEMPERATURE, CLOSURES, ENVIRONMENTS, THRESHOLD EFFECTS, PATHS, REGIONS, NITROGEN, GASES, CRACK PROPAGATION, DRY MATERIALS, LOW FREQUENCY, DISTILLED WATER, SOLUTION HEAT TREATMENT.

Subject Categories : Properties of Metals and Alloys
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE