HIGH FREQUENCY FATIGUE OF METALS AND THEIR CAVITATION DAMAGE RESISTANCE

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.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1964
Accession Number
AD0456365

Entities

People

  • A. Thiruvengadam

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Civil Engineering
  • Contracts
  • Corrosion
  • Fatigue Tests (Mechanics)
  • Frequency
  • Hydrodynamics
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Notch Sensitivity
  • Physics Laboratories
  • Resistance
  • Resonant Frequency
  • Ship Model Basins
  • Strain Hardening
  • Strain Rate
  • Tensile Strength

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Microwave Engineering.