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

K. Neishi, T. Uchida, A. Yamauchi, K. Nakamura, Z. Horita, T. G. Langdon

Research output: Contribution to journalArticle

59 Citations (Scopus)

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 ~ 1.5μm. 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.

Original languageEnglish
Pages (from-to)23-28
Number of pages6
JournalMaterials Science and Engineering A
Volume307
Issue number1-2
DOIs
Publication statusPublished - Jun 15 2001

Fingerprint

superplasticity
Equal channel angular pressing
Superplasticity
pressing
plastic deformation
Plastic deformation
Temperature
temperature
copper alloys
Copper alloys
Tensile testing
ductility
elongation
Melting point
Ductility
Elongation
grain size
melting
occurrences
microstructure

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

Cite this

Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation. / Neishi, K.; Uchida, T.; Yamauchi, A.; Nakamura, K.; Horita, Z.; Langdon, T. G.

In: Materials Science and Engineering A, Vol. 307, No. 1-2, 15.06.2001, p. 23-28.

Research output: Contribution to journalArticle

Neishi, K, Uchida, T, Yamauchi, A, Nakamura, K, Horita, Z & Langdon, TG 2001, 'Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation', Materials Science and Engineering A, vol. 307, no. 1-2, pp. 23-28. https://doi.org/10.1016/S0921-5093(00)01970-5
Neishi, K. ; Uchida, T. ; Yamauchi, A. ; Nakamura, K. ; Horita, Z. ; Langdon, T. G. / Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation. In: Materials Science and Engineering A. 2001 ; Vol. 307, No. 1-2. pp. 23-28.
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