Texture Evolution During Dynamic Loading of ECAP Tantalum

Abstract

A Taylor Impact experiment was conducted on commercially pure Ta subjected to thermo-mechanical processing that included Equal Channel Angular Pressing (ECAP), forging and annealing. The recovered specimen profile geometry was measured to characterize the extent of plastic anisotropy. Electron Backscattered Diffraction (EBSD) was used to characterize the texture evolution under dynamic loading. The as forged and annealed texture consisted of (111) [1-21] and (111) [-1-12] texture components. A series of EBSD crystal direction maps along the axial length of the specimen revealed that the texture evolution was described by a 19.5 degree rotation about the [-110] and [10-1] axes. This rotation was sufficient to bring {111} texture components of the original disk into alignment with the compression axis of the Taylor Impact specimen.

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Document Details

Document Type
Technical Report
Publication Date
Mar 01, 2011
Accession Number
ADA540396

Entities

People

  • Joel House
  • Philip Flater
  • Richard Harris
  • Robert De Angelis

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Compression
  • Data Sets
  • Engineering
  • Geometry
  • Materials
  • Measurement
  • Mechanical Properties
  • Metals
  • Military Research
  • Munitions
  • Personal Information Managers
  • Physical Properties
  • Rotation
  • Strain Rate
  • Tantalum

Readers

  • Combustion Dynamics and Shock Wave Physics.
  • Materials Science and Engineering.
  • Metallurgy

Technology Areas

  • Microelectronics