HIGH AND LOW STRESS LEVEL FATIGUE FRACTURES IN MILD STEEL.

Abstract

Fatigue fractures of mild steel under sinusoidal and random loading conditions have been investigated. The fractures can be divided into two groups; at low stresses the fatigue crack paths are transcrystalline and at high stresses they are both transcrystalline and intercrystalline. The transition occurs over a narrow stress range and is associated with a discontinuity in the S/N curve. This discontinuity involves the onset of yielding at the root of the notched specimens and the yield point in cyclic loading correlates with yielding in monotonic straining. (Author)

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1969
Accession Number
AD0695067

Entities

People

  • Matej Bily
  • Thomas R. G. Williams

Organizations

  • University of Southampton

Tags

DTIC Thesaurus Topics

  • Discontinuities
  • Mechanical Properties
  • Physical Properties
  • Transitions
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Mechanical Engineering/Mechanics of Materials.