Zobrazeno 1 - 10
of 11
pro vyhledávání: '"Koichi Takasawa"'
Publikováno v:
International Journal of Hydrogen Energy. 37:2669-2675
The tensile properties of several high-strength low-alloy steels in a 45 MPa hydrogen atmosphere at ambient temperature were examined with respect to the effects of grain size and dislocation density on hydrogen environment embrittlement. Grain size
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5b142f00ae4ed7faf2fc1f6acebb0c16
https://doi.org/10.1016/j.ijhydene.2011.10.099
https://doi.org/10.1016/j.ijhydene.2011.10.099
Publikováno v:
MATERIALS TRANSACTIONS. 51:347-353
The effect of grain size on the susceptibility of high-strength low alloy steels to hydrogen environment embrittlement in a 45 MPa gaseous hydrogen atmosphere was examined in term of the hydrogen content penetrating the specimen during the deformatio
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7548399a507cbe9fe9504d73c251a7ab
https://doi.org/10.2320/matertrans.m2009241
https://doi.org/10.2320/matertrans.m2009241
Publikováno v:
ISIJ International. 50:1496-1502
Absorption of hydrogen in a high-strength nickel–chromium–molybdenum steel during tensile deformation in 0.5 MPa gaseous hydrogen was examined using a thermal desorption analysis method. The tensile strength of the specimen was varied in the rang
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::326c353fb434489ddb3e1f26cb1e004b
https://doi.org/10.2355/isijinternational.50.1496
https://doi.org/10.2355/isijinternational.50.1496
Publikováno v:
Superalloys 2016
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::109561b8903fe7adb9166f2f5a6eea8e
https://doi.org/10.7449/superalloys/2016/superalloys_2016_65_73
https://doi.org/10.7449/superalloys/2016/superalloys_2016_65_73
Autor:
Koichi Takasawa, Ryusuke Nakamura, Hiroyuki Nitta, Shigeru Takemoto, Akiko Inoue, Yoshihiro Yamazaki, Yoshiaki Iijima
Publikováno v:
Journal of the Japan Institute of Metals. 69:321-331
Experimental techniques for precise determination of low tracer diffusion coefficients in solid metals and alloys using radioisotopes are reviewed. Sputter-microsectioning method is most useful to measure submicron diffusion profiles at low temperatu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4d03374e7c01d9edf3fc19b11c524715
https://doi.org/10.2320/jinstmet.69.321
https://doi.org/10.2320/jinstmet.69.321
Autor:
Yoshiaki Iijima, Akiko Inoue, Koichi Takasawa, Kenji Abiko, Yoshihiro Yamazaki, Seiichi Takaki
Publikováno v:
Matériaux & Techniques. 91:91-95
Grain boundary diffusivity of 51 Cr and 59 Fe in high purity Fe-50 mass% Cr and Fe-60 mass% Cr alloys have been measured in the temperature range from 473 to 1273 K by use of a serial lathe sectioning technique. Below 653 K, the grain boundary diffus
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c62eabbc3e38829cacfe9d7b882cc238
https://doi.org/10.1051/mattech/200391120091s
https://doi.org/10.1051/mattech/200391120091s
Autor:
Tokujiro Yamamoto, Takahiro Iida, Hiroyuki Nitta, Yoshihiro Yamazaki, Koichi Takasawa, R. Kanno, S. Ogu, Yoshiaki Iijima
Publikováno v:
Acta Materialia. 50:4117-4125
Tracer diffusion coefficient of 99Mo in α-iron has been determined in the temperature range between 833 and 1163 K by use of a serial sputter-microsectioning technique. The temperature dependence of the diffusion coefficient, D, in the whole tempera
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::93633009b9407efed9a637b4cf5b7278
https://doi.org/10.1016/s1359-6454(02)00229-x
https://doi.org/10.1016/s1359-6454(02)00229-x
Publikováno v:
MATERIALS TRANSACTIONS. 43:178-181
Volume and grain boundary diffusivities of 51 Cr and 59 Fe in a high purity Fe-50 mass%Cr-8 mass%W (Fe-50Cr-8W) alloy have been determined in the temperature range between 1023 and 1373 K with the sputter-microsectioning technique. The volume diffusi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::51885c7ad6529996ea1523c6926e1476
https://doi.org/10.2320/matertrans.43.178
https://doi.org/10.2320/matertrans.43.178
Autor:
Koichi TAKASAWA, Hideo HIRANO
Publikováno v:
The Journal of the Geological Society of Japan. 83:583-594
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::c43a5bba9d3fb9cb3cb51ce8361bced6
https://doi.org/10.5575/geosoc.83.583
https://doi.org/10.5575/geosoc.83.583
Autor:
Koichi Takasawa, Yoshimasu Kuroda
Publikováno v:
The Journal of the Geological Society of Japan. 80:425-427
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8d1e39b635683247691086e8626eb69d
https://doi.org/10.5575/geosoc.80.425
https://doi.org/10.5575/geosoc.80.425