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Processing of a low-carbon steel by equal-channel angular pressing

Fukuda, Y., Oh-ishi, K., Horita, Z. and Langdon, T.G. (2002) Processing of a low-carbon steel by equal-channel angular pressing Acta Materialia, 50, (6), pp. 1359-1368. (doi:10.1016/S1359-6454(01)00441-4).

Record type: Article

Abstract

A low-carbon steel containing 0.08% C was processed by Equal-Channel Angular Pressing (ECAP) with the sample rotated by 90° in the same direction between each pass in processing route BC. Samples were pressed through a total of three passes at room temperature. The results reveal an evolution in the microstructure with increasing strain from an array of elongated subgrains separated by boundaries having low angles of misorientation to an array of reasonably equiaxed grains separated by high-angle boundaries. The average grain size after three passes was 0.2 ?m. Processing by ECAP increases the 0.2% proof stress and the ultimate tensile strength (UTS) but there is a corresponding decrease in the elongation to failure. A comparison with earlier published results obtained using processing routes A (no rotation between passes) and C (rotation of 180° between passes) suggests that route BC is preferable because these samples exhibit an extensive region of strain hardening and a reasonably high elongation in tensile testing at room temperature. This difference is attributed to the greater microstructural homogeneity that is achieved when using processing route BC.

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More information

Published date: 2002
Keywords: equal-channel angular pressing, low temperature mechanical properties, microstructure, steels

Identifiers

Local EPrints ID: 23807
URI: http://eprints.soton.ac.uk/id/eprint/23807
ISSN: 1359-6454
PURE UUID: 2900060a-4286-4335-9d75-265b5ff4a715
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 30 Mar 2006
Last modified: 17 Jul 2017 16:16

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Contributors

Author: Y. Fukuda
Author: K. Oh-ishi
Author: Z. Horita
Author: T.G. Langdon ORCID iD

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