Mechanism-Dependent Fractal Character of Fracture Surfaces in High Strength and Toughness ASTM A723 Steels

Abstract

The fractal character of fracture surfaces of thick-walled pressure vessels produced in the final fast fracture that terminates low cycle fatigue tests is compared with that of fracture surfaces produced in Charpy impact tests in samples of the same high strength and toughness steel (ASTM A723) alloy. Slit island analysis yielded fractal dimensions near 1.25 for the Charpy specimens, which is typical of high strength steel alloys previously studied, however, extremely high fractal dimensions near 1.40 were determined for the low cycle fatigue specimens. The distributions of island and lake areas and of island and lake perimeters on random sections exhibit hyperbolic distributions analogous to those found for geographic islands and lakes. Hyperbolic distributions, Fractal dimension, Slit Island method, Fracture steel.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1993
Accession Number
ADA268956

Entities

People

  • Lawrence V. Meisel
  • Paul J. Cote
  • Peter Mcanulty

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Air Force
  • Charpy Impact Tests
  • Engineering
  • Fast Fractures
  • Fatigue Tests (Mechanics)
  • Ferrium
  • Fracture (Mechanics)
  • Impact Tests
  • Information Security
  • Mechanics
  • Military Research
  • New York
  • Personality
  • Pressure Vessels
  • Steel
  • Toughness

Readers

  • Materials Science (Mechanical Engineering).