| Budget Amount *help |
¥18,720,000 (Direct Cost: ¥14,400,000、Indirect Cost: ¥4,320,000)
Fiscal Year 2013: ¥3,510,000 (Direct Cost: ¥2,700,000、Indirect Cost: ¥810,000)
Fiscal Year 2012: ¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2011: ¥10,530,000 (Direct Cost: ¥8,100,000、Indirect Cost: ¥2,430,000)
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| Research Abstract |
This study investigates the possibility of nondestructive evaluation of structural changes by creep damage of Mod. 9Cr-1Mo steel which is used for structural material of the Japanese demonstration reactor of fast breeder, JSFR. For the purpose, dislocation density and precipitations of creep specimens were quantitatively analyzed, and frequency response of dynamic magnetization process were evaluated by the magneto-optical Kerr effect measurements and the FEM analysis of electromagnetic field. Through these investigations, the relation between structural change of creep specimens and dynamic response of magnetization were organized and the mechanism was discussed. Based on the measuring principle, the creep specimens of Mod. 9Cr-1Mo steel were evaluated by the non-linear eddy current method and the feasibility of evaluating structural change by creep damage was demonstrated.
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