Measuring Ti-7Al slip system strengths at elevated temperature using high-energy X-ray diffraction

Darren C. Pagan, Joel V. Bernier, Darren Dale, J. Y.Peter Ko, Todd J. Turner, Basil Blank, Paul A. Shade

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Full stress tensors of over four hundred individual grains in a titanium alloy specimen (Ti-7Al) are tracked during continuous uniaxial deformation through the elasto-plastic transition at 355°C. The experiment is facilitated by a unique radiative heating furnace and load frame designed for in-situ high-energy X-ray diffraction measurements. Average strengths of multiple slip system families are calculated directly from the ensemble grain stress data. Results show that elevated temperature lowers the strength of basal slip systems relative to prismatic slip systems, reduces the degree of flow softening due to precipitate shearing, and decreases the first-order pyramidal slip system work-hardening rate.

Original languageEnglish (US)
Pages (from-to)96-100
Number of pages5
JournalScripta Materialia
Volume142
DOIs
StatePublished - Jan 1 2018

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys

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