Investigation of High Temperature Ductility Losses in Alpha-Beta Titanium Alloys

Abstract

Under certain conditions, alpha-beta titanium alloys can show severely reduced high-temperature ductility. These conditions consist of loading in tension during cooling from a thermal excursion to above the beta transus. A model for this behavior, which relates the ductility loss to the volumetric incompatibility between the beta and alpha lattices during the beta to alpha transformation, has been previously proposed. This model was developed and investigated as part of an overall investigation of the ductility loss with respect to several metallurgical variables. It was found that the high- temperature ductility loss is ubiquitous in alpha-beta titanium alloys, but could not be directly related to lattice incompatibility. It was instead found that the ductility loss resulted from gross localized deformation within a particular microstructural component, lamellar Widmanstatten colonies.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1988
Accession Number
ADA196834

Entities

People

  • B. B. Rath
  • B. K. Damkroger
  • G. R. Edwards

Organizations

  • Colorado School of Mines

Tags

Communities of Interest

  • Air Platforms
  • Biomedical
  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Space

DTIC Thesaurus Topics

  • Chemistry
  • Computer Programs
  • Computers
  • Crystal Structure
  • Failure Mode And Effect Analysis
  • Materials
  • Materials Science
  • Materials Testing
  • Measurement
  • Mechanical Properties
  • Mechanical Working
  • Mechanics
  • Modulus Of Elasticity
  • Phase Transformations
  • Solid Solutions
  • Stress Strain Relations
  • Tensile Strength

Readers

  • Mathematics or Statistics
  • Powder metallurgy of Titanium alloys.