Elevated Temperature Crack Growth in Titanium Aluminides

Abstract

Crack growth of Titanium intermetallics at elevated temperatures has been studied. Based on limited amount of test data available in the literature, it is concluded that, for Titanium aluminides at temperatures over 700 C, Ct correlates better with da/dt than the LEFM parameter K. An alternative definition of Ct has also been derived in this study. The new Ct definition is based on a line integral along the outer boundary of the whole structure. Such an alternative definition hsa made it easier to calculate Ct for structural components. Keywords: Titanium aluminides, Creep, Fracture mechanics, Crack growth, High temperature, Alloys. (js)

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1990
Accession Number
ADA227700

Entities

People

  • An-yu Kuo
  • Ashok Saxena
  • J. P. Gallagher
  • K. L. Chen
  • M. Khobaib

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Computers
  • Creep
  • Fracture (Mechanics)
  • High Temperature
  • Literature Surveys
  • Low Temperature
  • Materials
  • Mechanical Properties
  • Mechanics
  • Modulus Of Elasticity
  • Stress Intensity Factors
  • Stresses
  • Structural Components
  • Test And Evaluation
  • Thermal Stresses
  • Yield Strength

Readers

  • Materials Science (Mechanical Engineering).
  • Surface Engineering/Surface Coating Technology.
  • Systems Analysis and Design