| Budget Amount *help |
¥45,500,000 (Direct Cost: ¥35,000,000、Indirect Cost: ¥10,500,000)
Fiscal Year 2014: ¥14,690,000 (Direct Cost: ¥11,300,000、Indirect Cost: ¥3,390,000)
Fiscal Year 2013: ¥14,560,000 (Direct Cost: ¥11,200,000、Indirect Cost: ¥3,360,000)
Fiscal Year 2012: ¥16,250,000 (Direct Cost: ¥12,500,000、Indirect Cost: ¥3,750,000)
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| Outline of Final Research Achievements |
Effect of liquid particles on grain growth in multi-phase structure was investigated. The following results were obtained.
(1) The grain growth of monotectic-type Fe-Bi, Zn-Bi and Al-Bi alloys was retarted by the dispersion of liquid particles with the formation of precipitation-free zones (PFZs) and large Bi particles located on the grain boundaries. (2) The grain growth characteristics of the liquid Bi particles dispersion structure of the two-phase (ferrite ((α) + liquid or austenite ((γ) +liquid) and the triple-phase (α+γ+liquid) in Fe-Mn-Al-Bi alloys show that when the matrix in the two- or triple-phase structures was the α phase, the fine Bi particles were dispersed within the α grain together with the formation of PFZs, while the matrix in the two- or triple-phase structures was the γ phase, most of the Bi particles were basically located on the grain boundaries.
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