Phase Transformations and Tensile Properties of Ti-10V-2Fe-3Al

Abstract

The effect of heat treatment on the microstructure of the metastable beta alloy Ti-10V-2Fe-3Al has been studied using light and electron metallography, analytical electron microscopy, and X-ray diffraction. A limited survey of the effect of microstructure on tensile properties of the alloy also has been conducted. It has been found that the alloy contains inclusions which are rich in Ti, S, Si, and P. The alloy has been shown to form the omega phase both athermally and isothermally. The isothermal omega can have either an ellipsoidal or a cuboidal morphology. The reasons for this are enumerated. The formation of the equilibrium alpha phase has been studied, and three distinct modes of formation are described. A stress induced orthorhombic martensite also has been observed. The effect of this stress induced product on tensile behavior is discussed. The relative roles of inclusions and alpha phase precipitates on tensile fracture also have been examined.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1979
Accession Number
ADA074093

Entities

People

  • G. T. Terlinde
  • J. C. Williams
  • T. W. Duerig

Organizations

  • Carnegie Mellon University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Chemistry
  • Electron Microscopes
  • Electron Microscopy
  • Grain Boundaries
  • Heat Energy
  • Materials
  • Materials Science
  • Mechanical Properties
  • Microscopes
  • Microscopy
  • Phase Transformations
  • Solid Solutions
  • Stress Strain Relations
  • Stresses
  • Tensile Properties
  • Transitions
  • X Rays

Fields of Study

  • Materials science

Readers

  • Mechanical Engineering/Mechanics of Materials.
  • Powder metallurgy of Titanium alloys.
  • Theoretical Analysis.

Technology Areas

  • Microelectronics