Effects of irradiation on mechanical properties of HIP-bonded reduced-activation ferritic/martensitic steel F82H first wall

Furuya, Kazuyuki; Wakai, Eiichi; Miyamoto, Kenji*; Akiba, Masato; Sugimoto, Masayoshi

Journal of Nuclear Materials, 367-370(1), p.494 - 499, 2007/08

https://doi.org/10.1016/j.jnucmat.2007.03.011

A partial mock-up of a breeding blanket structure made of F82H steel has been successfully fabricated. In this study, microstructural observation and EDX analysis of the HIP interfaces were performed, and effects of irradiation on mechanical properties of the HIP-bonded region were also examined. Neutron irradiation was performed up to about 2 dpa at about 523 K. After the irradiation, tensile test was performed at temperatures of 295 and 523 K. The HIP interfaces possessed many precipitates, and enriched peak spectrum of chromium was detected from the precipitates. In addition, aspect of the spectrum was qualitatively equivalent to that of MC in grain boundaries of F82H steel. In result, the HIP boundary has many MC which were generally seen in grain boundaries of F82H steel. Rupture did not occur in the HIP interface. In result, it can be mentioned that bondability is maintained under the irradiation and testing conditions. The strength and elongation of the HIP-bonded region decreased somewhat in comparison with the results of an IEA standard steel.

Fabrication of SiC fiber reinforced SiC composite by chemical vapor infiltration for excellent mechanical properties

Igawa, Naoki; Taguchi, Tomitsugu; Nozawa, Takashi*; Snead, L. L.*; Hinoki, Tatsuya*; McLaughlin, J. C.*; Kato, Yutai*; Jitsukawa, Shiro; Koyama, Akira*

Journal of Physics and Chemistry of Solids, 66(2-4), p.551 - 554, 2005/02

https://doi.org/10.1016/j.jpcs.2004.06.030

Silicon carbide is an important engineering ceramic because of its high strength and stability at high temperature and low induced radioactivity after neutron irradiation. Though monolithic SiC is brittle and low toughness, SiC fiber reinforced SiC matrix composites significantly improve these properties and therefore are attractive candidate materials for fusion reactor structural applications. Recently, stoichiometric SiC fibers with superior mechanical properties have been produced. We carried out the optimization of interface and composite fabrication using the chemical vapor infiltration, which is the one of the best techniques to fabricate the SiC composite. The composite with higher density and homogeneous matrix was obtained by the optimization of materials and carrier gas flow rate. The porosity was decreased with increasing the fiber volume fraction. We adopted the carbon or carbon/SiC interface between fiber and matrix and we found that the dependence of interface thickness on the tensile properties was small in the interface thickness from 50 to 300 nm.

Development of Be/DSCu HIP bonding and thermo-mechanical evaluation

Hatano, Toshihisa; Kuroda, Toshimasa*; Barabash, V.*; Enoeda, Mikio

Journal of Nuclear Materials, 307-311(2), p.1537 - 1541, 2002/12

https://doi.org/10.1016/S0022-3115(02)01071-1

no abstracts in English

High heat flux test of a HIP-bonded first wall panel of reduced activation ferritic steel F-82H

Hatano, Toshihisa; Suzuki, Satoshi; Yokoyama, Kenji; Kuroda, Toshimasa*; Enoeda, Mikio

Journal of Nuclear Materials, 283-287(1), p.685 - 688, 2000/12

https://doi.org/10.1016/S0022-3115(00)00230-0

no abstracts in English

Radiation effects on fiber-reinforced plastics

Udagawa, Akira

Hihakai Kensa, 45(4), p.270 - 275, 1996/00

http://ci.nii.ac.jp/naid/10001775420

no abstracts in English

High dose irradiation effects of aromatic polymer materials

*; *; Morita, Yosuke; Yagi, Toshiaki; Seguchi, Tadao

Denki Gakkai Yuden, Zetsuen Zairyo Kenkyukai Shiryo; DEI-94-91, 0, p.29 - 36, 1994/12

no abstracts in English

Radiation resistivity of FRP with low viscous four functional glycidyl amine as a matrix

Udagawa, Akira; Sasuga, Tsuneo; Seguchi, Tadao

DEI-91-134, p.41 - 47, 1991/12

no abstracts in English

Studies on radiation resistance of fiber reinforced plastic composites featured by easiness of manufacturing, III; Mechanical properties of high radiation resistant FRP

Udagawa, Akira; Sasuga, Tsuneo; Seguchi, Tadao; *; *; *; *; *; Sonoda, Katsumi*; *

JAERI-M 89-203, 20 Pages, 1989/12

JAERI-M-89-203.pdf:1.24MB

no abstracts in English

Changes of mechanical properties of CFRP by annealing after irradiation with electron beams.

; Sasuga, Tsuneo; Hagiwara, Miyuki; Seguchi, Tadao

EIM-86-133, p.43 - 52, 1986/00

no abstracts in English

Science-based integrated models for MOX properties, 1; Relation among lattice constant, coefficient of thermal expansion, mechanical properties and heat capacity

Hirooka, Shun; Kato, Masato; Akashi, Masatoshi; Morimoto, Kyoichi; Matsumoto, Taku

no journal, , 

Sound velocity in MOX pellet at room temperature was measured by ultrasound pulse-echo method. With the newly obtained data of Pu dependence (0-1) and reported data of porosity (0.0543-0.1439) and O/M (1.963-2.000) dependences, equations to evaluate sound velocity with these parameters were derived. Mechanical properties such as Young's modulus can be evaluated from sound velocity. By using Debye model, Debye temperature is evaluated from sound velocity and lattice parameter. Debye temperature leads to heat capacity at constant volume. Sound velocity, lattice parameter, heat capacity at constant volume and coefficient of thermal expansion lead to Gruneisen constant and dilatational term of heat capacity. Suppose that Gruneisen constant is not temperature-dependent, temperature dependence of Young's modulus can be evaluated. Calculated result of Young's modulus of (UPu)O decreased with increasing temperature, which is the same trend as literature.