Hot Straining Embrittlement and Material Assessment of 50 kg/mm<SUP>2</SUP> High Strength Steel
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- Satoh Kunihiko
- 大阪大学工学部
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- Toyoda Masao
- 大阪大学工学部
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- Kawaguchi Yoshiaki
- 住友金属工業 (株) 中央技術研究所
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- Arimochi Kazushige
- 住友金属工業 (株) 中央技術研究所
Bibliographic Information
- Other Title
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- 50キロ高張力鋼の溶接熱ひずみ脆化と材質評価法の検討
- 50キロ コウチョウリョク コウ ノ ヨウセツ ネツ ヒズミ ゼイカ ト ザイ
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Abstract
It is known that the remarkable effect of the pre-existing defect on the brittle fracture initiation characteristics of welded joint is mainly caused by the interaction between the residual stress and the deterioration of the fracture toughness due to the weld thermal strain cycles at the tip of the defect, so called the hot straining embrittlement. This embrittlement is not always accompanied with the change of metallurgical structures and moreover the region of the embrittlement is limited only in the very vicinity of the tip of the defect. Nevertheless it is clear that this embrittlement is one of the most important factors which cause the low stress brittle fracture initiation even in the service temperature in the case of the mild steel and 50 kg/mm2class high strength steel.<BR>In the present paper, various factors which have considerable effects on the hot straining embrittlement are extracted and effect of the temperature and the amount of the strain at the tip of the defect on the deterioration of fracture toughness are quantitatively evaluated. A simple testing method which uses a small size COD specimen prestrained at 250°C is developed to evaluate the susceptibility to the hot straining embrittlement. A mechanism of the hot straining embrittlement is studied by the results of this testing method, so called PBCT (Pre-compression Bending COD Test).
Journal
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- Journal of the Society of Naval Architects of Japan
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Journal of the Society of Naval Architects of Japan 1977 (142), 173-181, 1977
The Japan Society of Naval Architects and Ocean Engineers
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Details 詳細情報について
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- CRID
- 1390001204092430336
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- NII Article ID
- 110003878182
- 110003878151
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- NII Book ID
- AN00194094
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- ISSN
- 18842070
- 05148499
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- NDL BIB ID
- 1919869
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- Data Source
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- JaLC
- NDL
- Crossref
- NDL-Digital
- CiNii Articles
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- Abstract License Flag
- Disallowed