第10回
ステンレス鋳鋼の熱時効脆化推定法の検討
著者:
野際 公宏,Kimihiro NOGIWA,鬼塚 貴志,Takashi ONITSUKA,阿部 輝宜,Teruyoshi ABE,中村 孝久,Takahisa NAKAMURA,榊原 安英,Yasuhide SAKAKIBARA
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キーワードタグ:
Thermal embrittlement of cast austenitic stainless steel components from the decommissioned advanced thermal prototype reactor Fugen has been characterized. Cast stainless steel materials were obtained from recirculation pump casing. The actual time at temperature for the materials was 138,000 h at 275 oC. The “Fugen” material show modest decrease in Charpy-impact properties and a small increase in micro-Vickers hardness in ferrite phase because of thermal aging at relatively low service temperatures. ...
英字タイトル:
Research of Estimation Method of Thermal Aging Embrittlement on Cast Austenitic Stainless Steel
第15回
ナノインデンテーション硬さ試験と微細組織観察を用いたZr中へのδ水素化物発生に伴う硬化量評価
著者:
東郷 広一,鬼塚 貴志,福元 謙一,宇埜 正美,(福井大),牟田 浩明,(大阪大)
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In order to investigate that the hardening with δ hydrides generation in Zr was influenced by the relationship between the slip plane of dislocation and the habit plane of δ hydride, the EBSD analysis, the nano-indentation hardness test and the in-situ TEM observation during tensile test were performed. In the case when the δ hydrides of crystal orientation relationship (habit plane) of (0001)α plane//{111}δ plane and <2-1-10>α direction//<110>δ direction were precipitated in the Zr sample, the hardening of...
英字タイトル:
The hardening amount evaluation with δ hydrides generation in Zr by using the nano-indentation hardness test and microstructure observation
第15回
高クロム鋼の微細構造変化に与える熱時効と電子線照射の影響に関する基礎的研究
著者:
鬼塚 貴志,福元 謙一,(福井大),佐藤 紘一,(鹿児島大),Qui XU,薮内 敦,木野村 淳,(京都大)
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The phase decomposition behaviour of an experimental High-chromium Ferritic steel containing 40 wt.% chromium (Fe-40Cr) irradiated with 8 MeV electrons was studied by positron annihilation lifetime (PAL) measurements and coincidence Doppler broadening (CDB) of positron annihilation radiation measurements. Electron irradiation at 100 and at 475 ?C were performed on the specimens to nominally 0.03 to 0.3X10-3 dpa. The rapid increase of W-parameter obtained from the specimen irradiated at 100 ?C is most like...
英字タイトル:
Effect of Thermal Aging and Electron Irradiation on Microstructure Changes of High Chromium Steels