Addition of AlTi alloy refiners into an Al melt induces grain refinement of α-Al grains in as-cast pure Al. In this study, the effects of cold rolling for the AlTi alloy refiners on the grain refinement of as-cast pure Al were investigated. The Al3Ti particles in the refiners, which act as nuclei for the α-Al grains, were fragmented by cold rolling. Grain size of the α-Al grains is decreased as increasing the reduction ratio of the refiners. This decrease in grain size is due to the increase in the number of Al3Ti particles in the refiners. The mechanical properties of the as-cast pure Al are also improved as a result of its grain refinement. In particular, the wear properties of the as-cast pure Al were drastically improved. It is concluded that the cold rolling for the refiners is an effective process to enhance its grain refinement ability.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering