| Project/Area Number |
22760547
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
Structural/Functional materials
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| Research Institution | National Institute for Materials Science |
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Principal Investigator |
SAWADA Kota 独立行政法人物質・材料研究機構, 材料信頼性評価ユニット, 主任研究員 (00354225)
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| Project Period (FY) |
2010 – 2011
|
| Project Status |
Completed (Fiscal Year 2011)
|
| Budget Amount *help |
¥3,900,000 (Direct Cost: ¥3,000,000、Indirect Cost: ¥900,000)
Fiscal Year 2011: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
Fiscal Year 2010: ¥1,950,000 (Direct Cost: ¥1,500,000、Indirect Cost: ¥450,000)
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| Keywords | 火力発電プラント / 配管 / クリープ強度 / 材質劣化 / 有害析出相 / 改良9Cr-1Mo鋼 / 長時間クリープ / 長時間強度低下 / Z相 / MX炭窒化物 / クリープ強度低下 |
|---|
| Research Abstract |
It is necessary for pipes of thermal power plants to resist steam with high temperature and pressure for several tens of years. However, harmful precipitates form after operating of power plants for several years, leading to degradation of materials. Changes of number density and size of harmful precipitates during using of pipes were investigated. It was clear that the formation of harmful precipitates was pronounced after about six years. Applied stress due to the steam with high temperature and pressure promoted the formation of harmful precipitates.
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