JRR-3及びJRR-4の気送管設備を用いたα線トラックエッチング法による鋼中ボロンの状態分布観察法の確立と問題点

• 資料種別: 記事
• タイトル: JRR-3及びJRR-4の気送管設備を用いたα線トラックエッチング法による鋼中ボロンの状態分布観察法の確立と問題点
• 著者・編者: 朝倉 健太郎; 小関 敏彦; 川手 稔 他
• 著者標目: 朝倉 健太郎; 小関 敏彦; 川手 稔
• 並列タイトル等: Establishment and problem of the observing system for boron in steels by alpha-particle track etching method using pneumatic tube of JRR-3 and JRR-4
• タイトル（掲載誌）: 鉄と鋼 / 日本鉄鋼協会 編
• 巻号年月日等（掲載誌）: 93(10) 2007
• 掲載巻: 93
• 掲載号: 10
• 掲載ページ: 634～641
• 掲載年月日（W3CDTF）: 2007
• ISSN（掲載誌）: 0021-1575
• ISSN-L（掲載誌）: 0021-1575
• 出版事項（掲載誌）: 東京 : 日本鉄鋼協会
• 出版地（国名コード）: JP
• 本文の言語コード: jpn
• 件名標目: Boron; alpha-particle track etching; ATE; precipitation; segregation; pneumatic tube; thermal neutron flux; cadmium ratio; JRR-3; JRR-4
• NDLC: ZP42
• 対象利用者: 一般
• 所蔵機関: 国立国会図書館
• 請求記号: Z17-356
• 連携機関・データベース: 国立国会図書館 : 国立国会図書館雑誌記事索引; https://ndlsearch.ndl.go.jp
• 書誌ID（NDLBibID）: 8961374; http://id.ndl.go.jp/bib/8961374
• 整理区分コード: 632

• 要約等: The addition of small amount of boron to steel is often employed to improve various properties of steel, but there are still many uncertainties in the behavior of boron in steel. It is necessary to clarify the precipitation and segregation behaviors of boron to develop advanced steels. Alpha-particle track etching (ATE) method is effective to observe the behaviors of boron, but as the irradiation equipment of Japan Atomic Energy Agency (JAEA) has been more intensively used for medical research and treatment purposes recently, time available for the ATE method has been limited. In this study, ATE method using the pneumatic tube is investigated to make the analysis of boron in steel easier under such condition.<br>Results indicate that JRR-3 “PN-3” equipment of JAEA is the most applicable to the ATE method using the pneumatic tube. Since the ratio of cadmium of PN-3 is 290, the thermal neutron flux is sufficiently high with low level of background. Boron containing precipitates can be detected as dark spots and the grain boundary segregation of boron as dark lines. It is found, however, that the size of the spots in ATE images is not exactly the same as that of actual precipitates. When the ATE images are compared with TEM images using carbon extraction replica, borides are exaggerated as about hundred-times larger precipitates in the ATE images.
• DOI: 10.2355/tetsutohagane.93.634
• オンライン閲覧公開範囲: インターネット公開
• 連携機関・データベース: 科学技術振興機構 : J-STAGE; http://www.jstage.jst.go.jp

• 要約等: The addition of small amount of boron to steel is often employed to improve various properties of steel, but there are still many uncertainties in the behavior of boron in steel. It is necessary to clarify the precipitation and segregation behaviors of boron to develop advanced steels. Alpha-particle track etching (ATE) method is effective to observe the behaviors of boron, but as the irradiation equipment of Japan Atomic Energy Agency (JAEA) has been more intensively used for medical research and treatment purposes recently, time available for the ATE method has been limited. In this study, ATE method using the pneumatic tube is investigated to make the analysis of boron in steel easier under such condition.<br>Results indicate that JRR-3 “PN-3” equipment of JAEA is the most applicable to the ATE method using the pneumatic tube. Since the ratio of cadmium of PN-3 is 290, the thermal neutron flux is sufficiently high with low level of background. Boron containing precipitates can be detected as dark spots and the grain boundary segregation of boron as dark lines. It is found, however, that the size of the spots in ATE images is not exactly the same as that of actual precipitates. When the ATE images are compared with TEM images using carbon extraction replica, borides are exaggerated as about hundred-times larger precipitates in the ATE images.
• DOI: 10.2355/tetsutohagane.93.634; https://doi.org/10.2355/tetsutohagane.93.634
• 関連情報（URI）: http://id.ndl.go.jp/bib/8961374; https://ndlsearch.ndl.go.jp/books/R000000004-I8961374; http://www.jstage.jst.go.jp/article/tetsutohagane/93/10/93_10_634/_pdf
• 参照: １２Ｃｒ系耐熱鋳鋼の長時間クリープ破断強度に及ぼすＣｏおよびＢの効果; https://cir.nii.ac.jp/crid/1390001205127116672; ボロン含有１０Ｃｒ系耐熱鋼の長時間クリープ破断強度に及ぼすＣ，ＮおよびＮｉの効果; https://cir.nii.ac.jp/crid/1390001205127779968; 高Ｃｒフェライト系耐熱鋼の組織，逆Ｓ字クリープ破断強度に及ぼすＣｒ，Ａｌ，Ｎｉの影響; https://cir.nii.ac.jp/crid/1390001206487217664; 鋼中ボロン分析への飛行時間型二次イオン質量分析法の適用; https://cir.nii.ac.jp/crid/1390008998107623168
• 参照: Grain boundary segregation of boron during continuous cooling; https://cir.nii.ac.jp/crid/1360011143536805504; The non-equilibrium segregation of boron during the recrystalization of Nb-treated HSLA steels; https://cir.nii.ac.jp/crid/1362825896049028608; α線トラックエッチング法における推奨フィルムの探索; https://cir.nii.ac.jp/crid/1390001205182661504; 原研炉を用いたα線トラックエッチング法による鋼中ボロンの状態分布観察システムの確立; https://cir.nii.ac.jp/crid/1390282680159371520
• 連携機関・データベース: 国立情報学研究所 : CiNii Research; https://cir.nii.ac.jp/
• 提供元機関・データベース: Japan Link Center; https://japanlinkcenter.org/top; 雑誌記事索引データベース; https://ndlsearch.ndl.go.jp; Crossref; https://www.crossref.org; CiNii Articles
• 書誌ID（NDLBibID）: 8961374; http://id.ndl.go.jp/bib/8961374
• NII論文ID: 110006402806