書誌事項
- タイトル別名
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- Creep Damage Assessment of High Chromium Steel Forging through EBSD Method and Hardness Measurement
- EBSDホウ ト カタサ ケイソク ニ ヨル コウCr タンコウ ノ クリープ ソンショウ ヒョウカ
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10Cr-1Mo-1W-VNbN steel forging was observed through TEM, SEM with EBSD method and tested through nano-indentation tester to investigate the microstructural change during creep damage process. Long term creep rupture and interrupted creep test samples were investigated and effective damage parameters were selected. IPF map showed apparent boundaries within prior austenite grain boundaries, which corresponded to block boundaries. Area averaged KAM value KAMave was shown to be effective parameter for evaluating dislocation microstructural changes during creep. Nano-indentation tests were conducted at the same point of EBSD measurement, which showed good correlation between hardness value and the square root of KAMave. The differential equation of dislocation density with creep exposure time was applied to estimate the relationship between mean KAMave and creep exposure time through the relationship between hardness and dislocation density. The creep damage estimation curves were obtained from the the integrated form of the equation. As the KAMave showed substantial inclination plotted against time fraction in the primary creep stage, it could be used as the steady state creep characterization of the material and the rupture time. The statistical distribution characteristics of KAMave during creep damage process were also discussed.
収録刊行物
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- 日本機械学会論文集Ａ編
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日本機械学会論文集Ａ編 74 (739), 323-328, 2008
一般社団法人 日本機械学会
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詳細情報 詳細情報について
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- CRID
- 1390001204479291392
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- NII論文ID
- 110006643453
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- NII書誌ID
- AN0018742X
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- COI
- 1:CAS:528:DC%2BD1cXntValsr0%3D
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- ISSN
- 18848338
- 03875008
- http://id.crossref.org/issn/03875008
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- NDL書誌ID
- 9437772
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- 本文言語コード
- ja
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- データソース種別
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- 抄録ライセンスフラグ
- 使用不可