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Avoiding cracks and inhomogeneities in billets processed by ECAP

Avoiding cracks and inhomogeneities in billets processed by ECAP
Avoiding cracks and inhomogeneities in billets processed by ECAP
Although equal-channel angular pressing (ECAP) is now an established technique for producing bulk ultrafine-grained metallic materials, processing difficulties may arise because of the occurrence of cracking or inhomogeneities. This problem is examined with reference to experimental data for aluminum and magnesium alloys and a Pb–Sb alloy. It is shown that effective procedures are available for avoiding the development of inhomogeneities and the cracking of billets during ECAP: these procedures include introducing a pre-deformation of the as-cast material prior to ECAP, decreasing the strain produced in each ECAP pass by using dies with angles higher than 90°, and controlling the rotation of the billets between sequential passes.
0022-2461
4561-4570
Cetlin, Paulo R.
6fe5efb8-7976-4d56-8aae-08cbf76b9628
Aguilar, Maria Teresa P.
a3ec56c8-460d-4932-abde-b4f281fa5c4c
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Cetlin, Paulo R.
6fe5efb8-7976-4d56-8aae-08cbf76b9628
Aguilar, Maria Teresa P.
a3ec56c8-460d-4932-abde-b4f281fa5c4c
Figueiredo, Roberto B.
2e0060b8-6368-4d87-825a-c3cb90e92145
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Cetlin, Paulo R., Aguilar, Maria Teresa P., Figueiredo, Roberto B. and Langdon, Terence G. (2010) Avoiding cracks and inhomogeneities in billets processed by ECAP. Journal of Materials Science, 45 (17), 4561-4570. (doi:10.1007/s10853-010-4384-9).

Record type: Article

Abstract

Although equal-channel angular pressing (ECAP) is now an established technique for producing bulk ultrafine-grained metallic materials, processing difficulties may arise because of the occurrence of cracking or inhomogeneities. This problem is examined with reference to experimental data for aluminum and magnesium alloys and a Pb–Sb alloy. It is shown that effective procedures are available for avoiding the development of inhomogeneities and the cracking of billets during ECAP: these procedures include introducing a pre-deformation of the as-cast material prior to ECAP, decreasing the strain produced in each ECAP pass by using dies with angles higher than 90°, and controlling the rotation of the billets between sequential passes.

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More information

Published date: 2010
Organisations: Engineering Mats & Surface Engineerg Gp

Identifiers

Local EPrints ID: 170681
URI: https://eprints.soton.ac.uk/id/eprint/170681
ISSN: 0022-2461
PURE UUID: fcbe2f81-7075-40e5-8fea-c192ed1dd69e
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 11 Jan 2011 10:10
Last modified: 19 Jul 2019 00:59

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