Zobrazeno 1 - 10
of 272
pro vyhledávání: '"Shigeharu Ukai"'
Publikováno v:
Journal of Materials Research and Technology, Vol 30, Iss , Pp 9196-9204 (2024)
Oxide-dispersion-strengthened (ODS) FeCrAl alloys with different Al and Co contents were oxidized at 800 °C in air, and the oxidation behavior was investigated. The oxidation mass gain was measured, and the phase and morphology of the oxide scale we
Externí odkaz:
https://doaj.org/article/911d0061f3ad447ab66de97bb6e01d31
Autor:
Shigeharu Ukai, Shinichiro Yamashita
Publikováno v:
Journal of Materials Research and Technology, Vol 16, Iss , Pp 891-898 (2022)
The creep strain rate of FeCrAl oxide dispersion-strengthened alloys, as a promising accident-tolerant fuel (ATF) cladding of the light-water reactors, is accelerated in YAlO3 dispersoids by two to three orders of magnitude compared with Y4Zr3O12 dis
Externí odkaz:
https://doaj.org/article/995b6df422a44fa99695b0ce00f5685b
Autor:
Hao Yu, Haoran Wang, Sosuke Kondo, Yasuki Okuno, Ryuta Kasada, Naoko Oono-Hori, Shigeharu Ukai
Publikováno v:
Nuclear Materials and Energy, Vol 29, Iss , Pp 101102- (2021)
Alumina-forming FeCrAl oxide dispersion strengthened (ODS) ferritic alloys are considered as promising structure materials for the next-generation nuclear reactors. Current work is aimed at investigating Fe ion irradiation effect on the alumina scale
Externí odkaz:
https://doaj.org/article/053e903b35614071af3f7c3b358751dd
Publikováno v:
Nuclear Materials and Energy, Vol 25, Iss , Pp 100798- (2020)
In order to develop a robust alumina scale dispersed with nano-oxide particles for FeCrAl oxide dispersion strengthened (ODS) ferritic alloys, the oxidation behavior of FeCrAl ODS ferritic alloys with zirconium and excessive oxygen (Ex. O) additions
Externí odkaz:
https://doaj.org/article/24b29be363204e1ab33f9340cd92596f
Autor:
Bing Ma, Yoshimitsu Hishinuma, Yusuke Shimada, Hiroyuki Noto, Ryuta Kasada, Naoko Oono, Shigeharu Ukai, Takeo Muroga
Publikováno v:
Nuclear Materials and Energy, Vol 24, Iss , Pp 100773- (2020)
Dispersion-strengthened (DS) copper alloys with Y2O3 particles are known as high strength and high thermal conductivity materials having potential for heat sink materials of fusion devices. In the previous study on mechanical alloying (MA) and hot is
Externí odkaz:
https://doaj.org/article/8dc39df093394e9ab6237fe90509ebeb
Autor:
Hideo Sakasegawa, Xiang Chen, Taichiro Kato, Hiroyasu Tanigawa, Masami Ando, Josina W. Geringer, Shigeharu Ukai, Satoshi Ohtsuka
Publikováno v:
Nuclear Materials and Energy, Vol 16, Iss , Pp 108-113 (2018)
We developed a non-contact deformation measurement system to accurately evaluate strain for post irradiation tensile testing, since conventional strain gages cannot be used for small size specimens. The strain calculated from cross-head displacement
Externí odkaz:
https://doaj.org/article/3e16c63f84984bfc8c3c6c32bd0dde3e
Effect of Cr/Al contents on the 475ºC age-hardening in oxide dispersion strengthened ferritic steels
Autor:
Wentuo Han, Kiyohiro Yabuuchi, Akihiko Kimura, Shigeharu Ukai, Naoko Oono, Takeji Kaito, Tadahiko Torimaru, Shigenari Hayashi
Publikováno v:
Nuclear Materials and Energy, Vol 9, Iss C, Pp 610-615 (2016)
The age-hardening in oxide dispersion strengthened (ODS) ferritic steels with various additions of Cr (12, 15 and 18wt.%) and Al (0, 5, 7 and 9wt.%) were investigated. After 5000h aging at 475ºC, the hardness increases in all these ODS steels, while
Externí odkaz:
https://doaj.org/article/a295e0f7e8bd4f6cbc023168139deddd
Publikováno v:
Materials, Vol 12, Iss 20, p 3343 (2019)
As one candidate alloy for future Generation IV and fusion reactors, a dual-phase 12Cr oxide-dispersion-strengthened (ODS) alloy was developed for high temperature strength and creep resistance and has shown good void swelling resistance under high d
Externí odkaz:
https://doaj.org/article/2f48cc58471b4beb9bb1c49eb98f340a
Publikováno v:
Advances in Materials Science and Engineering, Vol 2011 (2011)
The precipitation and growth kinetics of γ′ precipitates, which are strengthening factors in Ni-base oxide dispersion strengthened (ODS) superalloys, were investigated. The cuboidal-type γ′ precipitates are formed in conventional arc-melted Ni
Externí odkaz:
https://doaj.org/article/5075cc18be0e41379950d7c84765b359
Publikováno v:
MATERIALS TRANSACTIONS. 62:1239-1246