The Equivalence of K(Ic) and J(Ic) Fracture-Toughness Measurements in Ni-Cr-Mo Steels.

Abstract

Several series of fracture toughness measurements were made in 4340 type steels, using both the standard K(Ic) test method and the J(Ic) test method described by Landes and Begley. K(Ic) results and J(Ic) results converted to K(Ic) units are nearly identical for a given steel over a range of specimen size. The fracture toughness of steels produced by vacuum-degassing, remelt, and airmelt processes are compared over a range of yield stress. Simplified J(Ic) test procedures are suggested for use with Ni-Cr-Mo steels within certain ranges of yield stress and specimen geometry.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1979
Accession Number
ADA362970

Entities

People

  • John H. Underwood

Organizations

  • United States Army Armament Research, Development and Engineering Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Crack Tips
  • Cracks
  • Displacement
  • Engineering
  • Engineers
  • Geometry
  • Materials
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Military Research
  • Stresses
  • Test Methods
  • Toughness
  • Weapon Systems
  • Weapons

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy