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Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation

Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation
Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation
A copper alloy containing 38% Zn and 3% Sn was subjected to severe plastic deformation at a temperature of 400°C using the procedure of equal-channel angular pressing (ECAP). The microstructures produced by ECAP were relatively heterogeneous with areas of both recrystallized and unrecrystallized grains. Within the recrystallized areas, the average grain size was 1.5?m. Tensile testing after ECAP revealed the occurrence of superplasticity with elongations up to 900%. Superplastic ductilities were recorded at temperatures as low as 300°C corresponding to an homologous temperature of 0.51Tm, where Tm is the absolute melting temperature of the alloy. These results demonstrate the potential for achieving low temperature superplasticity in this alloy through ECAP. As in conventional superplastic Cu-based alloys, specimens failed because of the development of internal cavities.
23-28
Neishi, K.
329e3a20-a14f-44e7-aef8-825a47da065e
Uchida, T.
1c1bcfef-9a83-4e91-8186-931e30f8abbd
Yamauchi, A.
2f7754e6-e97b-4bb6-b573-bc4d131fcb43
Nakamura, K.
3788fb40-df62-428d-b81f-c46c4db0849d
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86
Neishi, K.
329e3a20-a14f-44e7-aef8-825a47da065e
Uchida, T.
1c1bcfef-9a83-4e91-8186-931e30f8abbd
Yamauchi, A.
2f7754e6-e97b-4bb6-b573-bc4d131fcb43
Nakamura, K.
3788fb40-df62-428d-b81f-c46c4db0849d
Horita, Z.
84a80017-cbaf-4713-8346-6f69ac7ea63e
Langdon, T.G.
86e69b4f-e16d-4830-bf8a-5a9c11f0de86

Neishi, K., Uchida, T., Yamauchi, A., Nakamura, K., Horita, Z. and Langdon, T.G. (2001) Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation. Materials Science and Engineering, 307 (1-2), 23-28. (doi:10.1016/S0921-5093(00)01970-5).

Record type: Article

Abstract

A copper alloy containing 38% Zn and 3% Sn was subjected to severe plastic deformation at a temperature of 400°C using the procedure of equal-channel angular pressing (ECAP). The microstructures produced by ECAP were relatively heterogeneous with areas of both recrystallized and unrecrystallized grains. Within the recrystallized areas, the average grain size was 1.5?m. Tensile testing after ECAP revealed the occurrence of superplasticity with elongations up to 900%. Superplastic ductilities were recorded at temperatures as low as 300°C corresponding to an homologous temperature of 0.51Tm, where Tm is the absolute melting temperature of the alloy. These results demonstrate the potential for achieving low temperature superplasticity in this alloy through ECAP. As in conventional superplastic Cu-based alloys, specimens failed because of the development of internal cavities.

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Published date: 2001

Identifiers

Local EPrints ID: 23410
URI: http://eprints.soton.ac.uk/id/eprint/23410
PURE UUID: 59ac59f2-5cbb-44ed-84a7-653ee8ba33ff
ORCID for T.G. Langdon: ORCID iD orcid.org/0000-0003-3541-9250

Catalogue record

Date deposited: 23 Mar 2006
Last modified: 16 Mar 2024 03:27

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Contributors

Author: K. Neishi
Author: T. Uchida
Author: A. Yamauchi
Author: K. Nakamura
Author: Z. Horita
Author: T.G. Langdon ORCID iD

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