Phase Transformations in the Oxygen-Enriched Case Layer of Beta Titanium Alloys Formed During Oxidation (Preprint)

Abstract

The formation of an oxide layer along together with alpha precipitation in the subsurface oxygenenriched zone, during the oxidation of a Beta-Ti alloy, has been investigated using SEM, (S)TEM, and nanoindentation. Just below the nanocrystalline oxide layer, a two-phase mixture consisting of nanoscale equiaxed alpha grains and rutile grains is formed. Further below, the morphology of the alpha precipitates transitions to more lath-like with their size-scale, nucleation density, and the volume fraction of Beta progressively changing with increasing depth.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Aug 01, 2012
Accession Number
ADA564292

Entities

People

  • Amit Behera
  • Hooman Mohseni
  • J. Tiley
  • K. Mahdak
  • R. Banerjee
  • S. Nag

Organizations

  • University of North Texas

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Alloys
  • Chemical Reactions
  • Diffraction
  • Electron Microscopy
  • Hardness
  • Materials
  • Materials Science
  • Mechanical Properties
  • Microscopy
  • Oxidation
  • Phase Transformations
  • Precipitation
  • Titanium
  • Titanium Alloys
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Powder metallurgy of Titanium alloys.
  • Thin Film Deposition Science.