Creep Property Assessment of 9Cr Steel Boiler Piping by Small Punch Test
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- KOMAZAKI Shin-ichi
- Research Field in Engineering, Science and Engineering Area, Research and Education Assembly, Kagoshima University
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- OBATA Keisuke
- Graduate School of Science and Engineering, Kagoshima University
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- YAGUCHI Masatsugu
- Central Research Institute of Electric Power Industry
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- KANAI Masayuki
- Central Research Institute of Electric Power Industry
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- TOMOBE Masato
- Kobe Material Testing Laboratory Co., Ltd.
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- KUMADA Akihiro
- Kobe Material Testing Laboratory Co., Ltd.
Bibliographic Information
- Other Title
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- スモールパンチ試験法による9Cr鋼ボイラ配管のクリープ特性評価
- スモールパンチ シケンホウ ニ ヨル 9Crコウ ボイラ ハイカン ノ クリープ トクセイ ヒョウカ
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Abstract
<p>The small punch (SP) creep testing technique was applied to five heats of Gr.91 steel, which had been actually used for boiler pipings in the different USC power plants for long periods of time. As a result, it was found that the difference in creep strength between the heats, that is, the heat-to-heat variation, was well reflected in the SP creep property. In addition, the conventional SP test was carried out at room temperature and 650°C to obtain the load/stress conversion coefficient (F/σ) which is necessary for the conversion of SP creep rupture data to the uniaxial ones. The F/σ for each heat was estimated by the displacement to maximum load (um) using the correlation of F/σ = um h0/0.320. The experimental results revealed that the F/σ showed no significant change and it was 2.4-2.5 irrespective of heats. It was also found that the SP creep rupture data were relatively well converted to the uniaxial one with those coefficients.</p>
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 70 (2), 125-132, 2021-02-15
The Society of Materials Science, Japan
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Details 詳細情報について
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- CRID
- 1390568617214933376
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- NII Article ID
- 130007988325
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- NII Book ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 031307420
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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