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Hot crack susceptibility in multi-pass welds of reduced activation ferritic/martensitic steel F82H
https://repo.qst.go.jp/records/74711
https://repo.qst.go.jp/records/7471105ae65fd-0f26-4913-9898-a5cc3536918c
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2019-03-14 | |||||
| タイトル | ||||||
| タイトル | Hot crack susceptibility in multi-pass welds of reduced activation ferritic/martensitic steel F82H | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Mori, H.
× Mori, H.× Tanimura, H.× Kiyoku, R.× Fujiwara, M.× 加藤, 太一朗× 廣瀬, 貴規× 谷川, 博康× Kato, Taichiro× Hirose, Takanori× Tanigawa, Hiroyasu |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | The research and development of nuclear fusion reactors are going on conducting to acquire a next-generation energy source. It is supposed to be that the reduced activation ferritic/martensitic (RAFM) steel F82H is adopted as a strcutural material of the blanket module, which is the device set on the inner wall of fusion reactors. As welding for thicker plates of F82H, multi-pass welding will be adopted to the joints. In the case of multi-pass welding, hot cracking is one of serious defects in welds and is concerned in welds reheated by following weld passes. Therefore, the objectives of this study are to evaluate hot crack susceptibility in multi-pass welds of F82H and to clarify the cause of hot cracking in multi-pass welds of F82H. The hot crack susceptibility in multi-pass welds is evaluated by the longitudinal Varestraint test with double-bead and triple-bead types. From the observation of fractures surface occured in welds of F82H after the Varestraint test, the crack is identified as ductility-dip crack. The cause of hot crack in multi-pass welds of F82H is clarified by Vickers hardness test, SEM microstructure observations and X-ray diffraction pattern analyses. Based on these tests, when multi-pass welding is conducted for the F82H steels with high Ta contents, it should be considered to control welding conditions for prevention of hot cracking in weld metal as well as high strength martensitic steels. These results suggest that the cause of the crack is intragranular hardening by the precipitation of TaN during welding thermal cycles. | |||||
| 書誌情報 |
Journal of Nuclear Materials 巻 511, p. 556-559, 発行日 2018-06 |
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| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0022-3115 | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.jnucmat.2018.06.016 | |||||
| 関連サイト | ||||||
| 識別子タイプ | URI | |||||
| 関連識別子 | https://www.sciencedirect.com/science/article/pii/S0022311517316999 | |||||
