Crystallographic orientation relationship with geometrically necessary dislocation accumulation during high-temperature deformation in RR1000 nickel-based superalloy

Soran Birosca*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

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Abstract

In the current study, it is demonstrated that soft grains along 〈100〉 fiber provided a pure shear condition for easy dislocation movement leading to a relatively low dislocation density. The hard grains along the 〈111〉 fiber, however, were not favorably oriented for slip system activation and caused high dislocation accumulation. It is concluded that the average overall dislocation density does not provide a meaningful value, as it is largely dependent on the original material crystallographic texture, the numbers of hard and soft grains in the electron backscatter diffraction (EBSD) mapped area, and the grain size factor.

Original languageEnglish
Pages (from-to)534-539
Number of pages6
JournalMetallurgical and Materials Transactions A: Physical Metallurgy and Materials Science
Volume50
Issue number2
Early online date3 Dec 2018
DOIs
Publication statusPublished - 15 Feb 2019

Keywords

  • RCUK
  • EPSRC
  • EP/H500383/1
  • EP/H022309/1

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