Stress Corrosion Cracking Facet Crystallography of Ti-8Al-1Mo-1V (Preprint)

Abstract

The spatial and crystallographic orientations of facets formed during stress corrosion cracking of Ti-8Al-1Mo-1V have been characterized using quantitative fractography and electron backscatter diffraction. The results indicate that most facets are formed nearly perpendicular to the loading direction on irrational {hkil} planes. The facets were imaged with high resolution scanning electron microscopy and were found to contain evidence of localized plastic flow despite their "brittle" appearance at moderate magnification. Some fracture planes were related to titanium-hydride habit planes; however, the mechanism of faceted growth does not appear to involve hydride nucleation, growth, and fracture, but rather hydrogen enhanced localized plasticity.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 2011
Accession Number
ADA550536

Entities

People

  • A. H. Young
  • Adam L. Pilchak
  • J. C. Williams

Organizations

  • Air Force Research Laboratory

Tags

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Chemistry
  • Corrosion
  • Crystallography
  • Electron Microscopes
  • Electron Microscopy
  • High Resolution
  • Materials
  • Materials Science
  • Microscopes
  • Microscopy
  • Orientation (Direction)
  • Plastic Flow
  • Scanning Electron Microscopy
  • Stress Corrosion
  • Stress Corrosion Cracking

Fields of Study

  • Materials science

Readers

  • Materials Science and Engineering.
  • Structural Health Monitoring of Composite Structures.

Technology Areas

  • Microelectronics