Microstructural Changes Following Superplastic Deformation of Commercially Pure Titanium.

Abstract

Small specimens of commercially pure titanium have been subjected to creep testing in a specially designed furnace at temperatures between 815 and 925 C, followed by rapid cooling to room temperature. The characteristic failure mode was found to be dependent upon temperature and creep stress, at low temperature and/or high stress specimens developed a long diffuse neck whereas at high temperature and/or low stress a short localized neck developed. After testing specimens were examined by optical and electron microscopy. Dynamic recrystallization was observed in some of the former type of test piece. A tentative rationale for the observed behaviour is proposed on the basis of the strain rate sensitivity of the flow stress and the occurrence of grain growth. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Mar 15, 1981
Accession Number
ADA097277

Entities

People

  • Abraham Rosen

Organizations

  • Technion – Israel Institute of Technology

Tags

Communities of Interest

  • Space

DTIC Thesaurus Topics

  • Alloys
  • Creep
  • Creep Tests
  • Electron Microscopy
  • Elongation
  • Engineering
  • Failure Mode And Effect Analysis
  • Grain Growth
  • Grain Size
  • High Temperature
  • Materials
  • Materials Engineering
  • Strain Rate
  • Temperature Gradients
  • Titanium
  • Titanium Alloys
  • Transmission Electron Microscopy

Fields of Study

  • Materials science

Readers

  • Materials Science (Mechanical Engineering).
  • Powder metallurgy of Titanium alloys.
  • Systems Analysis and Design

Technology Areas

  • Microelectronics