| Budget Amount *help |
¥24,830,000 (Direct Cost: ¥19,100,000、Indirect Cost: ¥5,730,000)
Fiscal Year 2018: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2017: ¥13,000,000 (Direct Cost: ¥10,000,000、Indirect Cost: ¥3,000,000)
Fiscal Year 2016: ¥10,140,000 (Direct Cost: ¥7,800,000、Indirect Cost: ¥2,340,000)
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| Outline of Final Research Achievements |
In order to clarify the hydrogen embrittlement mechanism, many studies are performed focused on each hydrogen embrittlement fundamental processes. For example, atomic simulation revealed that the dislocation mobility alter depending on mechanical conditions and hydrogen concentration. This trend is also confirmed by nano-indentation tests; metals show hardened characteristic under higher hydrogen concentration, however, the characteristic change to softening under low hydrogen concentration conditions. This experimental results are qualitatively in good agreement with atomic simulation results. In addition, it is also confirmed that these tendency definitely occur under actual hydrogen embrittlement crack growth process. Based on those studies, the base of the fundamental process model of hydrogen embrittlement is constructed.
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