Creep Damage Assessment of High Chromium Steel Forging through EBSD Method and Hardness Measurement
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- FUJIYAMA Kazunari
- Department of Mechanical Engineering, Meijo University
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- MORI Keita
- 名城大学大学院理工学研究科
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- KANEKO Daisuke
- 名城大学大学院理工学研究科
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- MATSUNAGA Takahide
- Department of Mechanical Engineering, Meijo University
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- KIMACHI Hirohisa
- Department of Mechanical Engineering, Meijo University
Bibliographic Information
- Other Title
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- EBSD法と硬さ計測による高Cr鍛鋼のクリープ損傷評価
- 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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Description
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.
Journal
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- TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A
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TRANSACTIONS OF THE JAPAN SOCIETY OF MECHANICAL ENGINEERS Series A 74 (739), 323-328, 2008
The Japan Society of Mechanical Engineers
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Details 詳細情報について
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- CRID
- 1390001204479291392
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- NII Article ID
- 110006643453
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- NII Book 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 BIB ID
- 9437772
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed