Microstructural Evolution During Friction Stir Welding of Near-Alpha Titanium

Abstract

The microstructural evolution occurring around the tool was investigated in friction stir welds of the near-alpha alloy, Ti-5111. Specifically, the purpose of this investigation was to determine how the material ahead of the tool was influenced by the rotating tool to produce the refined grain structure observed adjacent to the tool and in the tool wake. This involved characterizing the base plate microstructure to show the original beta grain structure and its decomposition to form specific combinations of alpha lath orientations. The microstructure and texture of the final refined grain structure near the tool and in the deposited weld is also discussed.

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Document Details

Document Type
Technical Report
Publication Date
Feb 01, 2009
Accession Number
ADA536081

Entities

People

  • K. E. Knipling
  • R. W. Fonda

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Air Platforms

DTIC Thesaurus Topics

  • Alloys
  • Aluminum Alloys
  • Crystal Structure
  • Friction
  • Friction Stir Welding
  • High Temperature
  • Materials
  • Metals
  • Microstructure
  • Orientation (Direction)
  • Personal Information Managers
  • Phase Transformations
  • Titanium
  • Titanium Alloys
  • Transitions
  • Welding
  • Welds

Fields of Study

  • Materials science

Readers

  • Database Systems and Applications
  • Metallurgy
  • Powder metallurgy of Titanium alloys.