Influence of crystal orientation on the processing of copper single crystals by ECAP

Fukuda, P., Furukawa, M., Oh-ishi, K., Horita, Z. and Langdon, T.G. (2007) Influence of crystal orientation on the processing of copper single crystals by ECAP. Journal of Materials Science, 42, (5), 1501-1511. (doi:10.1007/s10853-006-0753-9).


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Single crystals of high-purity copper, having two different orientations, were pressed through one pass in equal-channel angular pressing (ECAP) at room temperature and then examined using several different analytical techniques. For both orientations, it is shown that elongated arrays of cells or subgrains are formed in the first pass with their long axes aligned parallel to the primary (111) [110] slip system. The average width of these subgrains was measured as ?0.2 ?m which is similar to the equilibrium grain size reported in polycrystalline Cu after processing by ECAP. These results confirm earlier observations using an aluminum single crystal except only that the subgrain width in copper is significantly smaller. This difference is attributed to the lower stacking-fault energy in copper and the consequent low rate of recovery.

Item Type: Article
Digital Object Identifier (DOI): doi:10.1007/s10853-006-0753-9
ISSNs: 0022-2461 (print)
Related URLs:
Subjects: T Technology > TP Chemical technology
T Technology > TA Engineering (General). Civil engineering (General)
Divisions : University Structure - Pre August 2011 > School of Engineering Sciences > Engineering Materials & Surface Engineering
ePrint ID: 48887
Accepted Date and Publication Date:
March 2007Published
Date Deposited: 17 Oct 2007
Last Modified: 31 Mar 2016 12:25

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