TY - JOUR
T1 - Low-temperature superplasticity in a Cu-Zn-Sn alloy processed by severe plastic deformation
AU - Neishi, K.
AU - Uchida, T.
AU - Yamauchi, A.
AU - Nakamura, K.
AU - Horita, Z.
AU - Langdon, T. G.
PY - 2001/6/15
Y1 - 2001/6/15
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=0035877319&partnerID=8YFLogxK
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U2 - 10.1016/S0921-5093(00)01970-5
DO - 10.1016/S0921-5093(00)01970-5
M3 - Article
AN - SCOPUS:0035877319
SN - 0921-5093
VL - 307
SP - 23
EP - 28
JO - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
JF - Materials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
IS - 1-2
ER -