A micromechanical solidification heat transfer in one dimensional AlAl2O3 composite and its consequence on microstructure evolution
✍ Scribed by C.G. Kang; S. Ray; P.K. Rohatgi
- Publisher
- Elsevier Science
- Year
- 1994
- Tongue
- English
- Weight
- 498 KB
- Volume
- 188
- Category
- Article
- ISSN
- 0921-5093
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✦ Synopsis
One dimensional heat transfer during solidification of aluminum melt, with and without alumina particles, has been investigated by the finite difference technique. The results indicate that in the region surrounding the particle, the temperatures are higher as compared with those in absence of particles. The solidification front slows down considerably in the vicinity of alumina particles.
A larger particle is more effective in slowing down the solidification front than a small particle or a cluster of two smaller particles of the same total length. The slowing down of the solidification front may be responsible for the observation that the alloy around the ceramic dispersoids is the last fraction to freeze.