Crack Propagation of Corona 5.

Abstract

This report includes mechanical property data for two heats of Corona-5(Ti-4.5AL-5Mo-1.5Cr), containing 0.1 and 0.2 wt% oxygen, respectively. The materials were finish forged below the beta transus and followed by a high strength heat treatment, which produced tensile yield strengths from 132 to 162 ksi and ultimate strengths from 146 to 177 ksi. Fatigue life at 70F and 600F was found to increase with increasing tensile strength. Fatigue crack growth rate data at 70F for the various microstructural conditions were grouped into a narrow band, with the higher strength conditions slightly more resistant to crack growth than the lower strength conditions. Also included are fatigue crack growth rate data as a function of R-ratio and temperature. Fractographic observations on two high strength conditions at 70F and 600F comparing R-ratio and temperature effects are presented. A report for effort on the effect of processing variables on grain size and mechanical properties of cold rolled Corona-5 sheet is appended.

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Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1986
Accession Number
ADA173778

Entities

People

  • J. C. Chestnutt

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Annealing
  • Classification
  • Contracts
  • Crack Propagation
  • Fatigue Life
  • Grain Size
  • Heat Treatment
  • Materials
  • Mechanical Properties
  • Mechanical Working
  • Microstructure
  • Plastic Explosives
  • Tensile Properties
  • Tensile Strength
  • Toughness
  • Yield Strength

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Metallurgy