| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
Fiscal Year 2009: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2008: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Research Abstract |
So as to improve the helium-embrittlement-resistance of candidate structural materials for innovative nuclear fission reactors and fusion ones, such as Fe-Ni-Cr austenitics and reduced activation ferritic steels, the evolution of helium bubble microstructure has been investigated under the stress at high temperatures. The embrittlement seemed to occur as described by critical bubble theory. It has been elucidated that the prevention of bubble growth at grain boundaries should be effective to the suppression of the embrittlement while helium capturing on intragranular precipitates provides little advantage.
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