| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2015: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2014: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
Fiscal Year 2013: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
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| Outline of Final Research Achievements |
Fractal dimensions of dendrites were measured at the transverse, longitudinal and oblique cross sections in unidirectionally solidified Al base alloys. Fractal dimension of dendrites at each section with same local solidification time showed same values. This result enables to estimate the cooling rate easily from the observed dendrite structures. Furthermore, a dimensionless perimeter was also examined as another parameter for expressing the complexity of dendrites.Tension test was carried out for the specimens having the structures with different fractal dimension and dimensionless perimeter. Along with increase in fractal dimension and dimensionless perimeter, tensile strength increased. Permeability of solid-liquid coexisting zone with the fraction of solid at the start of eutectic reaction can be estimated.
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