The Microstructure of Titanium Alloys as Influenced by Thin-Foil Artifacts,

Abstract

The occurrence of a variety of thin foil artifacts which form during preparation of electron microscope thin foils from Ti alloys have been described in the literature. These artifacts severely complicate the study of phase transformations and microstructure/property relations in Ti alloys. This paper illustrates several examples of such artifacts which occur in a wide range of alloys and show how their presence can be bothersome and, in some instances, grossly misleading. Examples include 'spontaneous relaxation' in beta-phase alloys, reversion of martensite and modification of omega-phase precipitates. An ion-thinning technique has been developed which suppresses the occurrence of thin foil artifacts, thereby permitting examination of alloys and microstructures which previously have not been analyzed. The structures of ion-thinned samples are illustrated and compared to the structures observed in conventionally thinned samples. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1974
Accession Number
AD0782596

Entities

People

  • C. G. Rhodes
  • J. C. Williams
  • R. A. Spurling

Tags

DTIC Thesaurus Topics

  • Alloys
  • Artifacts
  • Beta Testing
  • Buildings And Structures
  • Electron Microscopes
  • Electrons
  • Literature
  • Martensite
  • Microscopes
  • Microstructure
  • Phase Transformations
  • Precipitates
  • Titanium
  • Titanium Alloys

Fields of Study

  • Materials science

Readers

  • Educational Psychology
  • Powder metallurgy of Titanium alloys.

Technology Areas

  • Microelectronics
  • Microelectronics - Graphene