The significance of grain boundary sliding in the superplastic Zn–22% Al alloy after processing by ECAP
The significance of grain boundary sliding in the superplastic Zn–22% Al alloy after processing by ECAP
Specimens of the superplastic Zn–22% Al eutectoid alloy were processed by equal-channel angular pressing (ECAP) through a total of eight passes at 473 K. Tensile specimens were cut from the as-pressed billets and tested at two different strain rates at 473 K under conditions where there is superplastic flow. Marker lines were placed on the polished surfaces of the specimens prior to testing and these lines were used to take measurements of the grain boundary sliding offsets at elongations of ~30%. The measurements are used to estimate the contribution of sliding to the total strain and they show that grain boundary sliding is the dominant deformation mechanism under these conditions.
deformation mechanisms, equal-channel angular pressing, grain boundary sliding, superplasticity
447-450
Kumar, Praveen
6061332b-68e8-46ec-92ce-8ec6025748af
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
2005
Kumar, Praveen
6061332b-68e8-46ec-92ce-8ec6025748af
Xu, Cheng
af526865-aee4-4ef6-8174-def5c38149a2
Langdon, Terence G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Kumar, Praveen, Xu, Cheng and Langdon, Terence G.
(2005)
The significance of grain boundary sliding in the superplastic Zn–22% Al alloy after processing by ECAP.
Materials Science and Engineering: A, 410-411, .
(doi:10.1016/j.msea.2005.08.092).
Abstract
Specimens of the superplastic Zn–22% Al eutectoid alloy were processed by equal-channel angular pressing (ECAP) through a total of eight passes at 473 K. Tensile specimens were cut from the as-pressed billets and tested at two different strain rates at 473 K under conditions where there is superplastic flow. Marker lines were placed on the polished surfaces of the specimens prior to testing and these lines were used to take measurements of the grain boundary sliding offsets at elongations of ~30%. The measurements are used to estimate the contribution of sliding to the total strain and they show that grain boundary sliding is the dominant deformation mechanism under these conditions.
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Published date: 2005
Additional Information:
The Langdon Symposium: Flow and forming of Crystalline Materials
Keywords:
deformation mechanisms, equal-channel angular pressing, grain boundary sliding, superplasticity
Organisations:
Engineering Sciences
Identifiers
Local EPrints ID: 23827
URI: http://eprints.soton.ac.uk/id/eprint/23827
ISSN: 0921-5093
PURE UUID: 3a669b52-5423-43f5-ae44-5e8cfe208708
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Date deposited: 22 Mar 2006
Last modified: 16 Mar 2024 03:28
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Author:
Praveen Kumar
Author:
Cheng Xu
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