Adding small amounts of Si or Ga (3 at.%) to the eutectic Al 83Cu17 alloy yields an ultrafine bimodal eutectic composite microstructure upon solidification. The as-solidified alloys exhibit a distinct microstructural length-scale hierarchy leading to a high fracture strength of around 1 GPa combined with a large compressive plastic strain of up to 30% at room temperature. The present results suggest that the mechanical properties of the ultrafine bimodal eutectic composites are strongly related to their microstructural characteristics, namely phase evolution, length-scales, and distribution of the constituent phases.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics