Characterization of Creep Crack Growth Rate at the Early Stage and Estimation of Creep Crack Initiation Life for High Cr Steels and Their Weldments
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- SUGIURA Ryuji
- Tohoku Univ.
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- YOKOBORI, Jr. A. Toshimitsu
- Tohoku Univ.
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- SATO Kazuto
- Tohoku Univ.
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- TABUCHI Masaaki
- National Inst. for Materials Sci.
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- KOBAYASHI Kenichi
- Chiba Univ.
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- YATOMI Masataka
- Research Laboratory, IHI Co. Ltd.
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- NIKBIN Kamran
- Dept. of Mech. Eng., Imperial College
Bibliographic Information
- Other Title
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- 高Cr鋼溶接継手材の初期クリープき裂成長速度特性とき裂発生寿命評価
- コウCrコウ ヨウセツ ツギテザイ ノ ショキ クリープ キレツ セイチョウ ソクド トクセイ ト キレツ ハッセイ ジュミョウ ヒョウカ
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Abstract
Most boiler component structures are mainly fabricated by welding which are likely to be regions of crack initiation and propagation. In such weldment, it is known that the multi-axial stress fields appear due to the plastic constraint induced by the differences in material micro-structure between the weld metal, heat affected zone and base metal. Additionally, the technique of predicting the life of creep crack initiation and growth have not been clearly developed for weldments of high Cr steels due to many factors such as the variation in micro-structure and the residual stresses caused by welding and thermal cycles. The present paper indicates that in order to predict the total fracture life for weldment of high Cr steels, it is important to clarify the incubation process and path on a structural mechanical basis in order correctly determine the incubation time of creep crack growth. It may be useful to look at the role of Q* as correlating parameters to identify how best to rationalize the correlating parameter that can be used to predict both creep crack initiation and growth in weldments.
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 62 (2), 68-74, 2013
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
- 1390282680422587264
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- NII Article ID
- 130003367138
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- NII Book ID
- AN00096175
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- ISSN
- 18807488
- 05145163
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- NDL BIB ID
- 024295692
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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