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Crystallographic Orientation Relationship with Geometrically Necessary Dislocation Accumulation During High-Temperature Deformation in RR1000 Nickel-Based Superalloy / Soran, Birosca

Metallurgical and Materials Transactions A, Volume: 50, Issue: 2, Pages: 534 - 539

Swansea University Author: Soran, Birosca

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...

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Published in: Metallurgical and Materials Transactions A
ISSN: 1073-5623 1543-1940
Published: 2019
Online Access: Check full text

URI: https://cronfa.swan.ac.uk/Record/cronfa45993
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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.
College: College of Engineering
Issue: 2
Start Page: 534
End Page: 539