巻号一覧
61 巻 (2023)
- 6 号 p. 258-
- 5 号 p. 219-
- 4 号 p. 160-
- 3 号 p. 116-
- 2 号 p. 64-
- 1 号 p. 4-
前身誌
61 巻, 6 号
選択された号の論文の3件中1～3を表示しています
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論文
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土田 豊, 山村 実早保, 大村 朋彦2023 年 61 巻 6 号 p. 258-270
発行日: 2023年
公開日: 2023/12/28
ジャーナル フリーPeak separation on the TDA desorption curves was performed using the Gaussian distribution function. The amount of hydrogen at various traps was quantitatively evaluated for CrMo steel (JIS SCM435) and two types of CrMoV steel with different tempering temperatures. The pre-straining increases the density of dislocation, and causes the increment of the hydrogen trapped by dislocation (A1 hydrogen). The A1 hydrogen content becomes proportional to the amount of hydrogen trapped either by cementite (A0), dislocations (A1), grain boundaries (A2), and two kinds of V carbides (V1, V2), regardless the amount of pre-strain. Thus, the pre-strain affects non-explicitly on each amount of trapped hydrogen. It is also true for different hydrogen charging condition. The A1 hydrogen depends only on the dislocation density, meaning that the number density of dislocation is decisive. On the other hands, the amount of hydrogen at the other traps depends not on number densities but on the trapping efficiency of the trap sites. The vacancy, vacancy cluster and micro-void (B, C and D defects respectively) are formed by hydrogen charge after pre-straining, and behave differently from the A0, A1, A2, V1 and V2 traps; the amount of hydrogen trapped by these sites can be expressed as proportional to the product of the amount of pre-strain and the amount of A1 hydrogen for no pre-straining.抄録全体を表示PDF形式でダウンロード (1297K) -
富士 彰夫, 木原 重光, 小林 大祐2023 年 61 巻 6 号 p. 271-277
発行日: 2023年
公開日: 2023/12/28
ジャーナル フリーRBM (Risk-Based Maintenance) has been widely applied as a reasonable management system of maintenance and inspection planning for various facility or equipment. Regarding the RBM, the risk assessment was intended as practical use for static components such as many pressure vessels and piping system etc. However, various dynamic and functional component composed of a factory have been applied a different maintenance system.
In this study, RBM estimation method based on bathtub diagram and Weibull distribution concept is developed. It is composed the basic accumulated failure probability diagram, adjustment of scale parameter η and inspection confidence factor. As results, the RBM suggests the possibility of reasonable and comprehensive inspection and maintenance system.抄録全体を表示PDF形式でダウンロード (1858K)
解説
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吉田 聖一2023 年 61 巻 6 号 p. 278-289
発行日: 2023年
公開日: 2023/12/28
ジャーナル 認証ありThe author has reported incidents of storage facilities for energy products at the EST-1 Committee of High Pressure Institute of Japan. The information was obtained from the internet when the incidents occurred. In this paper, 40 incidents of storage facilities for energy products which occurred overseas in the first half of 2023 are reported.抄録全体を表示PDF形式でダウンロード (2426K)
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