Microhardness and EBSD microstructure mapping in partially-pressed Al and Cu through 90 degrees ECAP die
Microhardness and EBSD microstructure mapping in partially-pressed Al and Cu through 90 degrees ECAP die
Equal-channel angular pressing (ECAP) is widely recognized as an effective method for processing ultrafine-grained and even nanostructured materials. Important details on processes occurring in the die intersections can be obtained by mapping the microhardness and EBSD microstructures in partially-pressed aluminum and copper through the 90º die of ECAP. Precise measurements were made using grids of partially-pressed Al and Cu and detailed color maps were plotted and compared with EBSD maps. A narrow region along the bisector of two channels reflects altering in microhardness level of the material subjected to simple shear. The microstructural evolution suggests significant refining of the grain structure but there is noticeable inhomogeneity in the microhardness and microstructure for both materials. Factors contributing to the inhomogeneous hardness distribution include the coarse initial grain size, and inhomogeneous deformation across the plane of the die channel intersection due to die wall friction and the formation of a dead zone at the outer corner
equal channel angular pressing, microstructure, ebsd, aluminium, copper
586-591
Zhilyaev, Aleander P.
d053e518-1976-4633-8953-e8f34b9b7c44
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
May 2013
Zhilyaev, Aleander P.
d053e518-1976-4633-8953-e8f34b9b7c44
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Zhilyaev, Aleander P. and Langdon, Terence G.
(2013)
Microhardness and EBSD microstructure mapping in partially-pressed Al and Cu through 90 degrees ECAP die.
Materials Research, 16 (3), .
(doi:10.1590/S1516-14392013005000037).
Abstract
Equal-channel angular pressing (ECAP) is widely recognized as an effective method for processing ultrafine-grained and even nanostructured materials. Important details on processes occurring in the die intersections can be obtained by mapping the microhardness and EBSD microstructures in partially-pressed aluminum and copper through the 90º die of ECAP. Precise measurements were made using grids of partially-pressed Al and Cu and detailed color maps were plotted and compared with EBSD maps. A narrow region along the bisector of two channels reflects altering in microhardness level of the material subjected to simple shear. The microstructural evolution suggests significant refining of the grain structure but there is noticeable inhomogeneity in the microhardness and microstructure for both materials. Factors contributing to the inhomogeneous hardness distribution include the coarse initial grain size, and inhomogeneous deformation across the plane of the die channel intersection due to die wall friction and the formation of a dead zone at the outer corner
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Published date: May 2013
Keywords:
equal channel angular pressing, microstructure, ebsd, aluminium, copper
Organisations:
Engineering Mats & Surface Engineerg Gp
Identifiers
Local EPrints ID: 359493
URI: http://eprints.soton.ac.uk/id/eprint/359493
ISSN: 1516-1439
PURE UUID: cc5f2217-a078-4796-823c-becf58e38806
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Date deposited: 04 Nov 2013 16:24
Last modified: 15 Mar 2024 03:13
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Author:
Aleander P. Zhilyaev
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