An Investigation of Mechanisms Effecting Environmental Stress Cracking in Titanium Alloy,

Abstract

The Acoustic Emission System has been able to detect and record crack growth in a titanium alloy (Ti6Al4V) under a less than critical stress intensity (K sub 1) in a methanol environment. The fracture mechanics concept was applied to the data obtained on the 25.4mm (1 inch) modified wedge-open-load (WOL) specimen with a constant-open-displacement (COD) crack. A closed-loop environment system contained the specimen, methanol and piezoelectric transducer for the duration of the crack propagation under the sustained load. The crack growth to cumulative emissions count (da/dn) shows a decreasing linear relationship to the stress intensity (K sub 1). (Author)

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Document Details

Document Type
Technical Report
Publication Date
Jan 20, 1979
Accession Number
ADA069669

Entities

People

  • Ira J. Graham

Organizations

  • Southern University

Tags

Communities of Interest

  • Air Platforms
  • Counter IED
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Emissions
  • Acoustic Signals
  • Alcohols
  • Amplitude
  • Crack Propagation
  • Cracks
  • Emission
  • Engineering
  • Environmental Stress Cracking
  • Fracture (Mechanics)
  • Intensity
  • Mechanical Engineering
  • Mechanics
  • Piezoelectric Transducers
  • Stress Cracking
  • Titanium
  • Titanium Alloys

Readers

  • Materials Science (Mechanical Engineering).