Microalloying effect on the microstructure and mechanical properties in Al-Cu based dendrite-ultrafine composites

作者：Sohn S W; Park J M; Kim W T; Kim D H^*

来源：Journal of Alloys and Compounds, 2012, 541: 14-17.

DOI：10.1016/j.jallcom.2012.06.127

• Dendrite-ultrafine composites
• Microstructure
• Mechanical properties
• Heterogeneity

Microalloying effect of Sn or Ge (1 at.%) on the microstructure and mechanical properties of the hypoeutectic Al86Cu14 alloy has been investigated. The (Al86Cu14)(99)(Sn and Ge)(1) alloys exhibit a high fracture strength of 0.85 GPa and a large compressive plastic strain of similar to 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.

• 出版日期2012-11-15