The Investigation of the Fracture of Titanium Alloys by In-Situ and Analytical Microstructural Techniques

Abstract

To study the effects of microstructures on crack propagation in titanium and titanium alloys was the prime objective of this project. The initial phase consisted of producing and characterizing microstructures in Ti- 8Mn and in Ti-10V-2Fe-3Al. Other preliminary work was concerned with a determination of void initiation sites in C.P. titanium. The discovery that fracture surfaces exhibited limited areas with unusual dimple features, interpreted to have been caused by high temperatures, led to research on the temperature rise of moving crack tips. Experimentally, this entailed mechanical measurements using strain rates, the determination of stress intensity rates, straining in vacuum, measurement of fracture topographies by stereophotogrammetry, and the recording of light emission during fracture. Keywords: Polycrystalline titanium, Titanium alloys, Manganese alloys, Iron, Aluminum.

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Document Details

Document Type
Technical Report
Publication Date
Jun 01, 1988
Accession Number
ADA197514

Entities

People

  • Heinz G. Wilsdorf

Organizations

  • University of Virginia

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Cellular Structures
  • Crystal Structure
  • Electron Microscopes
  • Electron Microscopy
  • Finite Element Analysis
  • Geography
  • High Temperature
  • Materials
  • Materials Science
  • Mechanics
  • Melting Point
  • Microscopy
  • Stress Strain Relations
  • Tensile Properties
  • Thermal Conductivity
  • Three Dimensional
  • Two Dimensional

Readers

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