Zobrazeno 1 - 10
of 19
pro vyhledávání: '"Kazuho Okada"'
Autor:
Sukyoung Hwang, Hirokazu Kato, Kazuho Okada, Myeong-heom Park, Avala Lavakumar, Reza Gholizadeh, Hiroki Adachi, Masugu Sato, Nobuhiro Tsuji
Publikováno v:
Materials Research Letters, Vol 12, Iss 8, Pp 571-579 (2024)
Ultrafine-grained (UFG) high-Mn austenitic steel exhibited unusual discontinuous yielding on its stress-strain curve, characterized by a yield drop followed by a stress plateau, indicative of Lüders deformation. Utilizing the digital image correlati
Externí odkaz:
https://doaj.org/article/3e5cc0c1d025478f854fd00924ed41d2
Publikováno v:
Acta Agrobotanica, Vol 72, Iss 3 (2019)
We have isolated germacranolide-type sesquiterpene lactones with an α-methylene-γ-lactone moiety, dehydrocostus lactone (DHCL), costunolide, santamarine, and a novel compound denoted artabolide [3-hydroxy-4,6,7(H)-germacra-1(10),11(13)-dien-6,12-ol
Externí odkaz:
https://doaj.org/article/a2d0bc326e5a403e8938cbb342c50969
Publikováno v:
ISIJ International. 62:2081-2088
A typical hydrogen-related transgranular fracture, namely quasi-cleavage fracture, is usually accompanied by serrated markings on the resultant fracture surfaces in steels with body-centered cubic phases. The present paper investigated the microscopi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::5d68478d30621e2d60358257a797154d
https://doi.org/10.2355/isijinternational.isijint-2022-212
https://doi.org/10.2355/isijinternational.isijint-2022-212
Publikováno v:
ISIJ International. 62:2089-2094
The present study investigated the hydrogen-related fatigue fracture under various test frequencies in low-carbon martensitic steel. In the hydrogen-charged specimen, although the number of cycles to failure decreased with decreasing test frequency,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d7234ba1efe3be53e2fe569c886360d7
https://doi.org/10.2355/isijinternational.isijint-2022-210
https://doi.org/10.2355/isijinternational.isijint-2022-210
Publikováno v:
Scripta Materialia. 234:115568
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::86e434ee4f2718ac28cf0a843e581acb
https://doi.org/10.1016/j.scriptamat.2023.115568
https://doi.org/10.1016/j.scriptamat.2023.115568
Autor:
Kazuho Okada, Akinobu Shibata, Taisuke Sasaki, Hisashi Matsumiya, Kazuhiro Hono, Nobuhiro Tsuji
Publikováno v:
Scripta Materialia. 224
This study challenged to improve the resistance against hydrogen embrittlement by increasing the concentration of carbon segregated at prior austenite grain boundary (PAGB), XPAGB, in low-carbon martensitic steels. The specimens with/without carbon s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f8f820117174630157bdda695d82f9b
http://hdl.handle.net/2433/279069
http://hdl.handle.net/2433/279069
Publikováno v:
International Journal of Hydrogen Energy. 46:37509-37517
This study investigated the hydrogen-related fatigue fracture in 2Mn-0.1C steel having a lath martensite microstructure. The presence of hydrogen significantly reduced the fatigue life. The transgranular surface was a main component in each stress ra
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::da785e279b33edbaaa93fd9fe1a55bca
https://doi.org/10.1016/j.ijhydene.2021.09.011
https://doi.org/10.1016/j.ijhydene.2021.09.011
Publikováno v:
International Journal of Fatigue. 143
The present paper investigated characteristics of fatigue fracture behavior, particularly initiation stage of fatigue fracture (Stage I), in an as-quenched martensitic steel from microstructural and crystallographic points of view. The detailed cryst
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0e7cf19cb5dd78aaaf57fc1ccde9f292
http://hdl.handle.net/2433/277477
http://hdl.handle.net/2433/277477
Publikováno v:
SSRN Electronic Journal.
In this study, the deformation microstructure of hydrogen-charged ferritic-pearlitic 2Mn-0.1C steel was characterized using SEM-BSE, SEM-EBSD, TEM, and neutron diffraction. The microscopic mechanism of hydrogen-related quasi-cleavage fracture along t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::df7e3c769eeab103ab1f4373e1d376e3
https://doi.org/10.2139/ssrn.3844707
https://doi.org/10.2139/ssrn.3844707
Publikováno v:
Acta Materialia. 225:117549
In this study, the deformation microstructure of hydrogen-charged ferritic-pearlitic 2Mn-0.1C steel was characterized using SEM-BSE, SEM-EBSD, TEM, and neutron diffraction. The microscopic mechanism of hydrogen-related quasi-cleavage fracture along t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2a371ae6a166ea3f140299c72106ab94
https://doi.org/10.1016/j.actamat.2021.117549
https://doi.org/10.1016/j.actamat.2021.117549