2011 Fiscal Year Final Research Report
Measurement of three-dimensional geometry of creep void, and new method for residual life prediction by void volume ratio
| Project/Area Number |
21360048
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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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 | The University of Tokyo |
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Principal Investigator |
SAKAI Shinsuke 東京大学, 大学院・工学系研究科, 教授 (80134469)
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| Co-Investigator(Kenkyū-buntansha) |
IZUMI Satoshi 東京大学, 大学院・工学系研究科, 准教授 (30322069)
HARA Shotaro 東京大学, 大学院・工学系研究科, 特任講師 (10401134)
YAMAGIWA Kenta 独立行政法人労働安全衛生総合研究所, 主任研究員 (90371096)
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| Project Period (FY) |
2009 – 2011
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| Keywords | 材料設計 / プロセス / 物性 / 評価 |
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| Research Abstract |
Creep is one of the failure mode of high temperature equipment. Residual life is estimated by statistic analysis using feature of creep void that is small vacancy. Previously, the two dimensional analysis for void is used. In this research, method for measurement of three-dimensional geometry of void is developed by combining 3D-EBSD method and SEM images. The method enabled three-dimensional analysis of void. The method is applied to Chrome Molybdenum Steel that has been creep damaged. In the results, the void volume ratio, the variation of geometry by time and the relationship between grain boundary with void and stress direction are clarified.
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