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Five-parameter grain boundary distribution of commercially grain boundary engineered nickel and copper / V Randle, G.S Rohrer, H.M Miller, M Coleman, G.T Owen, Valerie Randle, Mark Coleman

Acta Materialia, Volume: 56, Issue: 10, Pages: 2363 - 2373

Swansea University Authors: Valerie Randle, Mark Coleman

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Abstract

The five-parameter grain boundary distributions of grain boundary engineered nickel and copper specimens have been analyzed in detail. The relative areas of {1 1 1} planes in the entire population did not increase as a result of grain boundary engineering (GBE) and, in the Σ3-excluded population, de...

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Published in: Acta Materialia
ISSN: 1359-6454
Published: 2008
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URI: https://cronfa.swan.ac.uk/Record/cronfa5522
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Abstract: The five-parameter grain boundary distributions of grain boundary engineered nickel and copper specimens have been analyzed in detail. The relative areas of {1 1 1} planes in the entire population did not increase as a result of grain boundary engineering (GBE) and, in the Σ3-excluded population, decreased after GBE. This decrease occurred because the majority of the newly generated Σ3 grain boundaries were not coherent twins with {1 1 1} grain boundary plane orientations. GBE increased the proportion of Σ3 boundary length that was vicinal-to-{1 1 1} and the proportion of asymmetrical 〈1 1 0〉 tilt boundaries. There was a clear propensity for selection of particular planes or plane combinations which were associated with low energy. These plane types were analyzed in some detail, and it was shown that many of these boundaries were asymmetrical tilts comprising (or vicinal to) at least one low-index plane.
Item Description: This work, which was part funded by EPSRC grant EP/C51260X, represents part of an ongoing international collaboration with Professor Rohrer at Carnegie Mellon University, USA. The work, which was published in an IF 3.76 journal and has 35 citations so far, makes a significant contribution to understanding the microstructure of grain boundary engineered material in commercially available products. This was achieved by the novel ‘five-parameter’ methodology. It has led to a new EPSRC research grant, ‘Extension of the five-parameter grain boundary stereological method to textured alloys’, EP/F030819/1, also in collaboration with Professor Roher (rohrer@cmu.edu).
Keywords: Grain boundary; Grain boundary twin; Electron backscatter diffraction; Grain boundary plane
College: College of Engineering
Issue: 10
Start Page: 2363
End Page: 2373