Correlation of Microstructures with Fracture Toughness Properties in Metals

Abstract

Ti-6Al-4V alloy was studied in three mill product forms for the purpose of establishing a correlation between microstructure and fracture toughness. Tension test, fracture toughness, and crack growth rate properties were determined. Light microscopy, scanning electron microfractography, and transmission electron microscopy were the metallographic means employed. A key factor in the microstructural and fracture toughness differences is cooling rate. The fatigue crack propagation rate was found to vary widely among the different microstructures. There was some correlation between microfractographic modes and fracture toughness.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Sep 30, 1973
Accession Number
AD0772103

Entities

People

  • Frank A. Crossley
  • Richard E. Lewis

Organizations

  • Lockheed Martin Missiles and Space

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Aircrafts
  • Airframes
  • Aluminum Alloys
  • Chemistry
  • Electron Microscopy
  • Fast Fractures
  • Materials
  • Materials Processing
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Phase Transformations
  • Reduction Of Area
  • Stress Intensity Factors
  • Tensile Properties
  • Tensile Strength

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics