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Microstructural evolution in a spray-cast aluminum alloy during equal-channel angular pressing

Microstructural evolution in a spray-cast aluminum alloy during equal-channel angular pressing
Microstructural evolution in a spray-cast aluminum alloy during equal-channel angular pressing
A spray-cast Al-7034 alloy was processed by equal-channel angular pressing (ECAP) to a total of 8 passes at 473 K and the pressed samples were examined using transmission electron microscopy, differential scanning calorimetry and electron back-scatter diffraction. It is shown that the grain size of the alloy is reduced to ~0.3 µm by ECAP and the high pressures associated with ECAP lead to a fragmentation of the rod-like eta-phase. The high temperature of ECAP also produces a precipitation of eta-phase. There is an increase in the fraction of high-angle boundaries during the initial passes of ECAP but the fraction of low-angle boundaries remains high even after 8 passes.
equal-channel angular pressing, grain boundary misorientation, precipitation, thermal processes, ultrafine grains
0921-5093
303-307
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Furukawa, Minoru
1ff823a3-0407-4215-889d-92fb66f8915c
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Gao, Nong
9c1370f7-f4a9-4109-8a3a-4089b3baec21
Starink, Marco J.
fe61a323-4e0c-49c7-91f0-4450e1ec1e51
Furukawa, Minoru
1ff823a3-0407-4215-889d-92fb66f8915c
Horita, Zenji
011521b8-3b29-494b-bf3f-346827ddbcce
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Gao, Nong, Starink, Marco J., Furukawa, Minoru, Horita, Zenji, Xu, Cheng and Langdon, Terence G. (2005) Microstructural evolution in a spray-cast aluminum alloy during equal-channel angular pressing. Materials Science and Engineering: A, 410-411 (11), 303-307. (doi:10.1016/j.msea.2005.08.075).

Record type: Article

Abstract

A spray-cast Al-7034 alloy was processed by equal-channel angular pressing (ECAP) to a total of 8 passes at 473 K and the pressed samples were examined using transmission electron microscopy, differential scanning calorimetry and electron back-scatter diffraction. It is shown that the grain size of the alloy is reduced to ~0.3 µm by ECAP and the high pressures associated with ECAP lead to a fragmentation of the rod-like eta-phase. The high temperature of ECAP also produces a precipitation of eta-phase. There is an increase in the fraction of high-angle boundaries during the initial passes of ECAP but the fraction of low-angle boundaries remains high even after 8 passes.

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Mat_Sci_Eng_410-2005-303.pdf - Accepted Manuscript
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More information

Published date: 2005
Keywords: equal-channel angular pressing, grain boundary misorientation, precipitation, thermal processes, ultrafine grains
Organisations: Engineering Sciences

Identifiers

Local EPrints ID: 19165
URI: http://eprints.soton.ac.uk/id/eprint/19165
ISSN: 0921-5093
PURE UUID: ad0a034e-2776-4169-a520-269b8af4afda
ORCID for Nong Gao: ORCID iD orcid.org/0000-0002-7430-0319
ORCID for Terence G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 16 Jan 2006
Last modified: 16 Mar 2024 03:27

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Contributors

Author: Nong Gao ORCID iD
Author: Minoru Furukawa
Author: Zenji Horita
Author: Cheng Xu

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