Fracture Extension Resistance (R-Curve) Characteristics for Three High-Strength Steels

Abstract

The fracture extension resistance curve (R curve), which delineates the increasing rate of plastic work needed to cause crack propagation in nonbrittle metals, is determined by using Dynamic Tear (DT) test procedures. The resistance parameter is the slope of the R curve. The effect of specimen thickness on the R-curve slope was investigated for three high-strength steels of high, intermediate, and low resistance to ductile fracture. R curves were determined for each steel in the full thickness (1 in.) and for thicknesses of 0.625 and 0.325 in.

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Document Details

Document Type
Technical Report
Publication Date
Dec 30, 1971
Accession Number
AD0737192

Entities

People

  • Ralph W. Judy Jr.
  • Robert J. Goode

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Bone Fractures
  • Chemical Composition
  • Crack Tips
  • Cracks
  • Ferrium
  • Fracture (Mechanics)
  • Geometry
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Metals
  • Resistance
  • Steel
  • Stresses
  • Test Methods
  • Thickness
  • Transitions

Readers

  • Materials Science (Mechanical Engineering).