Microalloying effect of Sn or Ge (1 at.%) on the microstructure and mechanical properties of the hypo-eutectic Al 86Cu 14 alloy has been investigated. The (Al 86Cu 14) 99(Sn and Ge) 1 alloys exhibit a high fracture strength of 0.85 GPa and a large compressive plastic strain of ∼10% at room temperature. The present results suggest that the minor addition of elements having immiscibility (Sn) or extremely limited solubility (Ge) with the main constituent element (Al) in the Al-Cu based dendrite-ultrafine composites has a strong influence on the microstructural evolution of eutectics such as phase constitution, distribution and colony morphology, leading to improve the compressive plasticity.
Bibliographical noteFunding Information:
This work was supported by Defense Acquisition Program Administration (DAPA) and Agency for Defense Development (ADD), and also supported by the Global Research Laboratory (GRL) Program of Korea Ministry of Science and Technology .
All Science Journal Classification (ASJC) codes
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys
- Materials Chemistry