Correlation of Two Fracture Toughness Tests for Titanium and Ferrous Alloys

Abstract

High-strength ferrous and titanium alloys are of interest for use in complex structures; a knowledge of the notch fracture toughness of these alloys is necessary to preclude catastrophic failure. A previously established relationship between the dynamic tear test energy and the explosion tear test performance provides reliable fracture-toughness information of those alloys characterized by a toughness level requiring plastic deformation to propagate fracture. This analysis has not been extended to the ultrahigh-strength alloys in which fracture can propagate catastrophically at elastic stress levels. For these alloys, the analytical methods of linear elastic fracture mechanics provide the required elastic stress level and flaw-size relationship for fracture. This report deals with a 'marriage' of the two approaches--the engineering and the analytical--by correlative techniques.

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Document Details

Document Type
Technical Report
Publication Date
Jan 16, 1969
Accession Number
AD0683659

Entities

People

  • C. N. Freed
  • Robert J. Goode

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Calorific Value
  • Chemistry
  • Crack Tips
  • Electron Beams
  • Ferrium
  • Fracture (Mechanics)
  • Heat Treatment
  • Iron Alloys
  • Materials
  • Measurement
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Stress Intensity Factors
  • Titanium Alloys
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design