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.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering