Accession Number : AD0456365


Title :   HIGH FREQUENCY FATIGUE OF METALS AND THEIR CAVITATION DAMAGE RESISTANCE


Corporate Author : HYDRONAUTICS INC LAUREL MD


Personal Author(s) : Thiruvengadam, A


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/456365.pdf


Report Date : Dec 1964


Pagination or Media Count : 55


Abstract : In order to verify the strain rate effects on the correlation between strain energy of metals and their cavitation damage resistance, high frequency fatigue tests at 14.2 kcs were conducted using a magnetostriction oscillator. Utilizing Morrow's theory, it was shown that fatigue at this frequency can be quantitatively predicted if a 15% reduction in static strain hardening factor is made. This result shows that strain rate effects are relatively small when plastic strain energy is used as a criterion. Experiments on corrosion showed fatigue strength can be reduced significantly for SAE 1020 steel in 3% NaCl solution even at high frequencies.


Descriptors :   *FATIGUE(MECHANICS) , *CAVITATION , OSCILLATORS , HIGH FREQUENCY , CORROSION , ALUMINUM ALLOYS , NICKEL ALLOYS , BRONZE , MAGNETOSTRICTION , RESISTANCE , STAINLESS STEEL , STEEL , PLASTIC PROPERTIES


Subject Categories : Properties of Metals and Alloys
      Fluid Mechanics
      Mechanics


Distribution Statement : APPROVED FOR PUBLIC RELEASE