Measurement and Interpretation of Flow Stress Data for the Simulation of Metal-Forming Processes

Abstract

Slip activity, Burgers vector populations, and dislocation densities were determined by X-ray line-profile analysis of peaks from individual grains in a bulk polycrystalline sample. The method was tested at the focused X-ray beamline ID11 at the European Synchrotron Research Facility (ESRF) in Grenoble, France and was applied to a bulk commercial purity titanium specimen for which slip activity was determined for 49 single grains. The most-active slip systems were of <a> and <c+a> type, and the orientation of the stresses acting on these slip systems revealed a spread due to the effect of neighborhood grains on plastic response. The new x-ray method can provide input for crystal-plasticity analyses and permits experimental verification of the results of numerical calculations which was not possible before.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2010
Accession Number
ADA522175

Entities

People

  • Sheldon Lee Semiatin
  • T. Altan

Organizations

  • Air Force Research Laboratory

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Force
  • Air Force Research Laboratories
  • Cold Working
  • Crystal Lattices
  • Crystal Structure
  • Crystals
  • Grain Size
  • Hot Working
  • Manufacturing
  • Materials
  • Measurement
  • Mechanical Working
  • Metals
  • Metalworking
  • Research Facilities
  • Stress Strain Relations
  • Stresses

Readers

  • Materials Science and Engineering.