Effect of Pre-Strain History on Small Crack Growth under Low Cycle Fatigue for JIS SFVQ1A Steel
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- HASUNUMA Shota
- Graduate School, of Sci. and Eng., Aoyama Gakuin Univ.
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- MIYATA Yohei
- Dept. Mech. Eng., Aoyama Gakuin Univ.
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- SAKAUE Kenichi
- Dept. Mech. Eng., Aoyama Gakuin Univ.
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- OGAWA Takeshi
- Dept. Mech. Eng., Aoyama Gakuin Univ.
Bibliographic Information
- Other Title
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- 低合金鋼SFVQ1Aの低サイクル疲労における微小き裂進展に及ぼす予ひずみ履歴の影響
- テイゴウキン コウ SFVQ1A ノ テイサイクル ヒロウ ニ オケル ビショウ キレツ シンテン ニ オヨボス ヨヒズミ リレキ ノ エイキョウ
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Abstract
Low cycle fatigue tests were performed for a low alloy steel, JIS SFVQ1A, used for pressure vessels of nuclear power plants. The effect of pre-strain history on the small crack initiation and growth was investigated in detail using cellulose acetate replicas. Under the tests in which the total strain range, Δε, is constant, surface crack length, 2c, was smaller for the tests with larger Δε due to the different numbers of small crack initiation and coalescence. The pre-strain histories were applied at Δε of 8 or 16% with its fatigue usage factor, UF, of less than 0.2, followed by fatigue loading at Δε = 2% until fracture. In these tests, the relationships between 2c and UF agreed with each other unless crack coalescence occurred. The scatter in fatigue life was attributed to the coalescences of small cracks. Fracture mechanics approach was applied to predict the fatigue lives and to characterize the growth behavior of small fatigue cracks.
Journal
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- Journal of the Society of Materials Science, Japan
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Journal of the Society of Materials Science, Japan 60 (3), 210-216, 2011
The Society of Materials Science, Japan
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Keywords
Details 詳細情報について
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- CRID
- 1390282680394457472
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- NII Article ID
- 130000673516
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- NII Book ID
- AN00096175
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- COI
- 1:CAS:528:DC%2BC3MXkvVeis7s%3D
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 11043231
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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