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JAEA Reports

Measurement of sorption, diffusion and pore physicality for granite sample

Kunimaru, Takanori; Morikawa, Keita; Tachi, Yukio; Kuno, Yoshio*; Hosoya, Shinichi*; Shimoda, Satoko*; Kato, Hiroyasu*; Nakazawa, Toshiyuki*; Ikuse, Hiroyuki*; Kubota, Masako*

JAEA-Data/Code 2012-013, 96 Pages, 2012/07

JAEA-Data-Code-2012-013.pdf:7.41MB
JAEA-Data-Code-2012-013(errata).pdf:0.13MB

For the purpose to understand the relationship between characteristic of mass transport and characteristic of fracture, the following experiments were carried out using core sample, which was sampled from the -300 m Stage. This paper compiled the results of these experiment. (1) Diffusion experiments of Cs, Sr, I and uranin in granite samples (2) Sorption experiments of Cs and Sr on crushed granite (3) Measurement of pore physicality by Mercury Intrusion and water saturation

Journal Articles

Influence of heat treatment on long term creep properties of 9Cr-W-Mo-V-Nb steel

Obara, Satoshi; Wakai, Takashi; Asayama, Tai; Yamada, Yoshiyuki*; Nakazawa, Takanori*; Yamazaki, Masayoshi*; Hongo, Hiromichi*

Tetsu To Hagane, 96(4), p.172 - 181, 2010/04

This paper describes the effect of heat treatment on mechanical properties of 9Cr-W-Mo-V-Nb steel as a part of development of high Cr steel for fast breeder reactor (FBR). The effects of normalizing temperature and tempering temperature and time on creep properties were investigated from the viewpoint of microstructures. Creep strength increased with increase in normalizing temperature from 950$$^{circ}$$C to 1200$$^{circ}$$C. The microstructural factors that improve creep strength are increased amount of MX which precipitated during tempering process and increased dislocation density. In addition, coarsening of prior austenite grain size also contribute to increasing creep strength. Although creep rupture time of 780$$^{circ}$$C-1h tempering specimen was greater than that of 700$$^{circ}$$C-1h and 750$$^{circ}$$C-1h tempering specimen in a long-term region exceeding 20000h at 650$$^{circ}$$C, creep ductility and reduction of area of the former remarkably degraded compared to those of the latter.

Journal Articles

Influence of heat treatments on high temperature tensile properties and toughness of 9Cr-W-Mo-V-Nb steel

Obara, Satoshi; Wakai, Takashi; Asayama, Tai; Yamada, Yoshiyuki*; Nakazawa, Takanori*

Tetsu To Hagane, 95(5), p.417 - 425, 2009/05

 Times Cited Count:6 Percentile:42.8(Metallurgy & Metallurgical Engineering)

This paper describes the effect of heat treatment on mechanical properties of high chromium (Cr) ferritic steel 9Cr-W-Mo-V-Nb steel as a part of development of high Cr steel for fast breeder reactor (FBR). The effects of normalizing temperature and tempering temperature and time on high temperature tensile properties and Charpy impact properties were investigated from the viewpoint of microstructures.

Oral presentation

Effect of heat treatment on precipitation behavior of 9Cr steel

Kimura, Kenichi*; Mogi, Satoshi*; Nakazawa, Takanori*; Wakai, Takashi

no journal, , 

This paper describes the effect of normalizing and tempering conditions on precipitation behavior in a 9Cr alloy. It is supposed that normalizing process at 1373K followed by water quenching is adequate to achieve an ideal microstructure after tempering. Fine and densely distributed precipitates can be obtained by double tempering process at 823K and 1023K.

Oral presentation

Effect of heat treatment on high temperature tensile property and toughness in 9Cr-W-Mo-V-Nb steel

Obara, Satoshi; Yamada, Yoshiyuki*; Nakazawa, Takanori*

no journal, , 

This presentation shows the effect of heat treatment on high tensile property and toughness in W added high Cr ferritic heat resistant steel with several heat treatments. In the tensile test at evaluated temperature, the tensile strength was increased with increasing normalizing temperature. On the contrary, the tensile strength was decreased with increasing tempering temperature and time. In the Charpy impact test, fracture appearance transition temperature (FATT) was increased and upper shelf energy (USE) was decreased with increasing normalizing temperature. On the contrary, the FATT was decreased and USE was increased with increasing tempering temperature and time.

Oral presentation

Effect of heat treatment on high temperature strength of 9Cr-W-Mo-V-Nb steel

Obara, Satoshi; Yamada, Yoshiyuki*; Nakazawa, Takanori*; Yamazaki, Masayoshi*; Hongo, Hiromichi*

no journal, , 

no abstracts in English

Oral presentation

Effect of heat treatment on the creep properties of 9Cr-W-Mo steel

Miyashita, Yuta*; Nakazawa, Takanori*; Obara, Satoshi; Yamazaki, Masayoshi*; Hongo, Hiromichi*

no journal, , 

no abstracts in English

Oral presentation

Influence of alloying elements on creep properties of 9Cr steels

Obara, Satoshi; Wakai, Takashi; Asayama, Tai; Mogi, Masaru*; Miyashita, Yuta*; Nakazawa, Takanori*

no journal, , 

no abstracts in English

Oral presentation

Effect of heat treatment on long term creep properties of ASME grade 92 steel

Obara, Satoshi; Wakai, Takashi; Asayama, Tai; Yamada, Yoshiyuki*; Nakazawa, Takanori*; Yamazaki, Masayoshi*; Hongo, Hiromichi*

no journal, , 

no abstracts in English

Oral presentation

Effects of heat treatments on long term creep properties of 9Cr-W-Mo-V-Nb steel

Obara, Satoshi; Wakai, Takashi; Asayama, Tai; Yamada, Yoshiyuki*; Nakazawa, Takanori*; Yamazaki, Masayoshi*; Hongo, Hiromichi*

no journal, , 

This paper describes the effect of heat treatment on long-term creep properties of 9Cr-W-Mo-V-Nb steel which in the specification of ASME Grade 92 as a part of development of high Cr steel for fast breeder reactor (FBR). The effects of normalizing temperature and tempering temperature and time on long-term creep properties were investigated from the viewpoint of microstructures.

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