Fracture and Fatigue-Crack-Propagation Characteristics of 1/4-Inch Mill-Annealed Ti-6Al-4V Titanium Alloy Plate

Abstract

The fracture and fatigue-crack-propagation behavior of central through-the-thickness cracks has been evaluated in 1/4-inch-thick mill-annealed titanium alloy plate. The influence of crack aspect ratio on the fracture or residual strength of three panel widths has been determined. The fatigue-crack- propagation rates for various maximum stresses, stress ratios, and panel widths have been evaluated. It was observed that elastic fractures in the presence of central through-cracks do not occur in panels of this material less than 18 inches wide. Uniform and regular fatigue-crack-propagation behavior is noted. A fatigue-crack-propagation threshold is evident below 3 or 4 ksi/sq in. Power law modeling of rate data, crack life prediction, and interpretive discussions were also considered.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Nov 01, 1971
Accession Number
AD0748644

Entities

People

  • Charles E. Feddersen
  • Walter S. Hyler

Organizations

  • Battelle Memorial Institute

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Aluminum Alloys
  • Aspect Ratio
  • Chemistry
  • Crack Propagation
  • Data Analysis
  • Data Sets
  • Engineering
  • Failure Mode And Effect Analysis
  • Materials
  • Measurement
  • Mechanical Properties
  • Plastic Explosives
  • Stress Intensity Factors
  • Structural Engineering
  • Test And Evaluation
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).