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論文
ウォータジェットピーニング施工材の実機環境下における残留応力緩和挙動 ― Ni 基合金に対する応力改善効果の長期安定性評価(第 1 報)―
著者:
于 麗娜,Lina YU,才田 一幸,Kazuyoshi SAIDA,西本 和俊,Kazutoshi NISHIMOTO,千種 直樹,Naoki CHIGUSA
発刊日:
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In order to prevent primary water stress corrosion cracking (PWSCC), water jet peening (WJP) has been used on the welds of Ni-based alloys in pressurized water reactors (PWRs). However, the compressive residual stresses induced by WJP might be relaxed during the actual operation because of the elevated temperature environment. Therefore, the stability of the compressive residual stresses caused by WJP has been investigated during thermal aging. The result shows that the compressive residual stresses has...
英字タイトル:
Relaxation behavior of residual stress generated by water jet peening under operation temperature environment ― Evaluation for long term stability of residual stress improving treatment on Ni base alloy (report 1) ―
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論文
各種残留応力改善工法による効果の安定性に関する速度論的検討 ― Ni 基合金に対する応力改善効果の長期安定性評価(第2報)―
著者:
于 麗娜,Lina YU,才田 一幸,Kazuyoshi SAIDA,西本 和俊,Kazutoshi NISHIMOTO,千種 直樹,Naoki CHIGUSA
発刊日:
公開日:
キーワードタグ:
Stress corrosion cracking (SCC) is one of serious aging degradation problems for the Alloy 600 components of pressurized water reactors (PWRs). In order to prevent SCC, various methods such as water jet peening (WJP), laser peening (LP), surface polishing have been used to introduce compressive stresses at the surfaces of the PWR components. However, it has been reported that such compressive residual stress introduced by these methods might be relaxed during the practical operation, because of high te...
英字タイトル:
Kinetic analysis on the long term stability of the effect obtained by various residual stress improvement methods ― Evaluation for long term stability of residual stress improving treatment on Ni base alloy (report 2) ―
論文
表面加工による残留応力改善の長期信頼性評価について
著者:
瀬良 健彦,Takehiko SERA,平野 伸朗,Shinro HIRANO,千種 直樹,Naoki CHIGUSA,岡野 成威,Shigetaka OKANO,才田 一幸,Kazuyoshi SAIDA,望月 正人,Masahito MOCHIZUKI,西本 和俊,Kazutoshi NISHIMOTO
発刊日:
公開日:
キーワードタグ:
Abstract Surface finishing methods, such as Water Jet Peening (WJP), have been applied to welds in some major components of nuclear power plants as a counter measure to Primary Water Stress Corrosion Cracking (PWSCC). In addition, the methods of surface finishing (buffing treatment) is being standardized, and thus the buffing treatment has been also recognized as the well-established method of improving stress. On the other hand, the long-term stability of peening techniques has been confirmed by acc...
英字タイトル:
Prediction method of long-term reliability in improving residual stresses by means of surface finishing