Crack Growth Characteristic and Damage Evaluation under Creep-Fatigue Interactive Condition for W-Added High-Cr Steel
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- Matsuzaki Takashi
- Graduate School of Engineering, Tohoku University
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- Sugiura Ryuji
- Graduate School of Engineering, Tohoku University
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- Nagumo Yoshiko
- Graduate School of Engineering, Tohoku University
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- Yokobori, Jr. A. Toshimitsu
- Graduate School of Engineering, Tohoku University
Bibliographic Information
- Other Title
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- 高 Cr フェライト系耐熱鋼のクリープ・疲労条件下におけるき裂成長特性と損傷評価
- コウCr フェライトケイ タイネツコウ ノ クリープ ・ ヒロウ ジョウケン カ ニ オケル キレツ セイチョウ トクセイ ト ソンショウ ヒョウカ
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Abstract
Crack growth characteristic under the conditions of high temperature creep and fatigue interaction is dominated by cyclic dependent mechanism due to fatigue and time dependent mechanism due to the time of load application (creep). For many cases, this characteristic changes from the cyclic dependent to the time dependent mechanisms through an unstable transition region induced by creep and fatigue competitive mechanisms. To understand the physical mechanism of the interactive effects of creep and fatigue, it is important to clarify the damage mechanics around the crack. In the present study, the experiments of creep-fatigue crack growth tests and the quantitative analysis of damage by measuring Vickers hardness were conducted to understand the interactive effects of creep and fatigue on the crack growth characteristic. Additionally, by observing the material microstructure using EBSD, damage mechanisms were clarified. As a result, creep effect contributed to the expansion of damage region and fatigue effect increased the degree of damage. Interaction of these effects resulted in the occurrence of unstable transition region on the characteristic of creep-fatigue life.<br>
Journal
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- Journal of the Japan Institute of Metals and Materials
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Journal of the Japan Institute of Metals and Materials 76 (11), 624-633, 2012
The Japan Institute of Metals and Materials
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Keywords
Details 詳細情報について
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- CRID
- 1390001206482594176
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- NII Article ID
- 10031129950
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- NII Book ID
- AN00187860
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- ISSN
- 18806880
- 24337501
- 00214876
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- NDL BIB ID
- 024079425
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- Text Lang
- ja
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
- KAKEN
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- Abstract License Flag
- Disallowed