Mechanical-Electrochemical Interaction Mechanism for the Effect of Elastic-Plastic Anisotropy on Stress Corrosion Cracking in High Temperature Water
| Project/Area Number |
20560063
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Materials/Mechanics of materials
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| Research Institution | Tohoku University |
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Principal Investigator |
LU Zhanpeng 東北大学, 大学院・工学研究科, 准教授 (30419999)
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| Co-Investigator(Kenkyū-buntansha) |
SHOJI Tetsuo 東北大学, 大学院・工学研究科, 教授 (80091700)
TAKEDA Yoichi 東北大学, 大学院・工学研究科, 助教 (40374970)
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| Project Period (FY) |
2008 – 2010
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| Project Status |
Completed (Fiscal Year 2010)
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| Budget Amount *help |
¥4,680,000 (Direct Cost: ¥3,600,000、Indirect Cost: ¥1,080,000)
Fiscal Year 2010: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2009: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2008: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 環境強度 / 応力腐食割れ / 弾塑性異方性 / 高温水 / 電気化学 / 構造材料 / 軽水炉 |
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| Research Abstract |
Stress corrosion cracking (SCC)of austenitic alloys in simulated boiling water reactor (BWR)environments and pressurized water reactor (PWR)environments are measured. The effects of mechanical anisotropy and environmental parameters were investigated by experimental and theoretical methods. In a simulated PWR primary water, a significantly higher growth rate was observed in a 1-D rolled 316L stainless steel (SS)than those in a 3-D rolled 316L SS. SCC growth rates of 304NG SS after 1-D rolling are higher in the T-L orientation than those in the L-T orientation in both oxygenated and hydrogenated water at 288 oC. The mild inhibiting effect of decreasing electrode potential on crack growth of cold-rolled SSs is analyzed. Microstructure and local misorientation in 316NG SS weld heat-affected zones were measured and correlated to SCC in high temperature water.
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Report
(4 results)
Research Products
(37 results)
