論文
SUS304鋼の高温疲労損傷初期段階における磁気特性変化
著者:
高屋 茂,Shigeru TAKAYA,永江 勇二,Yuji NAGAE
発刊日:
公開日:
キーワードタグ:
Developing a precise nondestructive estimation method of material degradation before crack initiation will contribute to enhancement of safety and economical efficiency of a fast breeder reactor plant. Magnetic property is expected to be an effective indicator. In this study, fatigue tests on SUS304 stainless steel at 650°C were conducted until transition hardening region, 25% and 50% of the number of cycles to fracture and the distribution of magnetic flux density from each sample was measured to r...
英字タイトル:
Magnetic Property Change of SUS304 Stainless Steel at Initial State of Fatigue Damage in High Temperature Environment
会員のみダウンロード可能

論文
「もんじゅ」点検期間長期化の課題の分析から学ぶ次世代高速炉の保全合理化案の提案(1)~低温停止中の「もんじゅ」のプラント工程の分析~
著者:
橋立 竜太,Ryuta HASHIDATE 豊田 晃大,Kodai TOYOTA 高橋 慧多,Keita TAKAHASHI 矢田 浩基,Hiroki YADA 高屋 茂,Shigeru TAKAYA
発刊日:
公開日:
キーワードタグ:
本論文では、点検自体の期間も長く、その遅延が直接プラント工程に影響を及ぼすクリティカルパスの点検に着目し、もんじゅの点検に要する期間が長期化した要因を分析する。この要因に対し、次世代高速炉における合理的な保全を実現し、稼働率を向上させることを目的とした、次世代高速炉の設計や運用に反映すべき対策を検討した。...
英字タイトル:
Proposal of Maintenance Rationalization for Next-Generation Fast Reactors based on the Analysis of the Prolonged Maintenance of the Prototype Fast-Breeder Reactor in Japan, “Monju”  (1) ~Analysis of Plant Schedule of “Monju” in Cold Shutdown~
論文
オーステナイト系ステンレス鋼溶接継手の金属組織と 残留応力に及ぼす実機での高温長時間使用および補修溶接の影響
著者:
小原 智史,Satoshi OBARA,高屋 茂,Shigeru TAKAYA,若井 隆純,Takashi WAKAI,浅山 泰,Tai ASAYAMA,鈴木 裕士,Hiroshi SUZUKI,齊藤 徹,Toru SAITOH,Laurent MARTIN
発刊日:
公開日:
キーワードタグ:
For the commercialization of fast breeder reactors (FBR), it is essential to enhance the economic competitiveness by reduction of total cost by elongation of plant service period. In this point of view, it is important to establish the assessment method of integrity of aged weld joint and repair welding for the components of future long life FBR. In the present study, evolution of microstructure is evaluated for the 304SS-304SS weld joint which was used for 88,000h at 526-545°C in the French proto-typ...
英字タイトル:
Influence of FBR plant service and repair welding on microstructure and residual stress of austenitic stainless steel weld joint
論文
照射損傷評価のための遠隔操作式振動試料型磁力計の開発
著者:
高屋 茂,Shigeru TAKAYA,山県 一郎,Ichiro YAMAGATA,市川 正一,Shoichi ICHIKAWA,永江 勇二,Yuji NAGAE,若井 栄一,Eiichi WAKAI
発刊日:
公開日:
キーワードタグ:
The remote operated vibrating sample magnetometer (VSM) for neutron irradiated samples has been developed. The maximum range of applied magnetic field is more than ±0.5/?0 A/m, and the resolution of magnetic moment is higher than 5 ×10-8 A?m2. The hysteresis loops of neutron irradiated samples were measured by this VSM, and the relationships between dose, which is one of epresentative irradiation parameter, and magnetic properties such as magnetic coercive force were examined. As result, it was revealed tha...
英字タイトル:
Development of Remote Operated Vibrating Sample Magnetometer for Evaluation of Irradiation Damage
論文
磁気的手法による応力腐食割れの初期劣化評価
著者:
高屋 茂,Shigeru TAKAYA,鈴木 隆之,Takayuki SUZUKI,松本 善博,Yoshihiro MATSUMOTO,出町 和之,Kazuyuki DEMACHI,上坂 充,Mitsuru UESAKA
発刊日:
公開日:
キーワードタグ:
Two magnetic methods are proposed for the evaluation of initial degradations of type 304 stainless steel in stress corrosion cracking (SCC). The first one is the measurement of the distribution of chromium depletion by means of a magnetic force microscope (MEM). MEM observations are performed for some samples sensitized in various conditions, and the obtained results coincide with the expected ones from the chromium behavior. Moreover, the phase distributions in the solution-annealed and sensitized states a...
英字タイトル:
Evaluation of Initial Degradation in Stress Corrosion Cracking by Magnetic Methods
論文
高速炉用 9Cr フェライト系耐熱鋼における溶接 HAZ 部の組織解析
著者:
岩田 満直,Mitsunao IWATA,杉山 雄一,Yuichi SUGIYAMA,村田 純教,Yoshinori MURATA,高屋 茂,Shigeru TAKAYA
発刊日:
公開日:
キーワードタグ:
State of microstructure in metallic materials can be expressed as numerical values based on a concept of system free energy, and the energy value is used as a measure of damage analysis of the materials. In this study, change in the system free energy of the FG-HAZ in 9Cr heat resistant ferritic steels during creep is evaluated as summation of chemical free energy, strain energy and surface energy, which are obtained by a series of experiments, i.e., chemical analysis using extracted residues, X-ray d...
英字タイトル:
Microstructural analysis of HAZ in the welded joints of 9Cr heat resistant ferritic steels for fast reactor