| Budget Amount *help |
¥26,780,000 (Direct Cost: ¥20,600,000、Indirect Cost: ¥6,180,000)
Fiscal Year 2014: ¥1,430,000 (Direct Cost: ¥1,100,000、Indirect Cost: ¥330,000)
Fiscal Year 2013: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2012: ¥7,150,000 (Direct Cost: ¥5,500,000、Indirect Cost: ¥1,650,000)
Fiscal Year 2011: ¥14,820,000 (Direct Cost: ¥11,400,000、Indirect Cost: ¥3,420,000)
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| Outline of Final Research Achievements |
It is important to predict the mechanical behavior of metals under hydrogen environments for the safe usage of hydrogen. In this study, we investigated the influences of material, mechanical, and environmental factors on the fracture mechanism of metals by the use of both analytical and experimental approaches. Major achievements are as follows: (a)The dominant hydrogen effect changes depending on the boundary conditions. (b)The mechanisms which increase the concentration of lattice defects were revealed. (c)The plastic-strain rate at localized area is rapidly increased immediately prior to fracture initiation by hydrogen.
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