Abstract
A simple and effective approach of employing an abrupt increase in growth velocity is presented to obtain entirely coupled eutectics in directional solidification of off-eutectic alloys. Using the proposed approach, the velocity required for the growth of entirely coupled eutectics in off-eutectic alloys can be increased remarkably. In directionally solidified Al40 wt% Cu hypereutectic alloys with a thermal gradient of 250 K/cm, primary Al 2Cu dendrites appeared at constant growth velocities ranging from 5 to 100 μm/s and entirely coupled eutectics formed at 1 μm/s. Employing the abrupt increase in growth velocity, the growth velocity of purely coupled eutectics could attain 100 μm/s.
Original language | English |
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Pages (from-to) | 279-284 |
Number of pages | 6 |
Journal | Journal of Crystal Growth |
Volume | 314 |
Issue number | 1 |
DOIs | |
State | Published - 1 Jan 2011 |
Keywords
- A1. Directional solidification
- A1. Eutectics
- A2. Bridgman technique
- A2. Growth from melt
- B1. Alloys