Zobrazeno 1 - 10
of 196
pro vyhledávání: '"Itsuo Ohnaka"'
Publikováno v:
In Transactions of Nonferrous Metals Society of China 2006 16 Supplement 2:s582-s585
Autor:
Itsuo Ohnaka
Publikováno v:
Materia Japan. 53:462-466
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::37faa8fde59dba0fa0a6e7773357fb4e
https://doi.org/10.2320/materia.53.462
https://doi.org/10.2320/materia.53.462
Publikováno v:
International Journal of Cast Metals Research. 24:133-138
Although computer simulation has progressed rapidly and widely in the casting industry over the last decades, many problems still remain challenging. This paper overviews the problems being faced most frequently, including estimation of material prop
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5e4c710f33a100b353d88e2fc3b1dd42
https://doi.org/10.1179/136404611x13001912813690
https://doi.org/10.1179/136404611x13001912813690
Publikováno v:
Key Engineering Materials. 457:299-304
Although several computer simulation codes have been developed to predict and prevent defects of lost foam castings, most of them are focused on aluminum alloy castings. This paper presents a new simulation method suitable for not only aluminum alloy
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7d1f6345040cdb685f57ff3bfadfbe9d
https://doi.org/10.4028/www.scientific.net/kem.457.299
https://doi.org/10.4028/www.scientific.net/kem.457.299
Autor:
Keiji Umetani, Akira Sugiyama, Itsuo Ohnaka, Noriaki Nakatsuka, Y. Yamamoto, Masato Yoshiya, Kentarou Uesugi, Hideyuki Yasuda, Tomoya Nagira
Publikováno v:
International Journal of Cast Metals Research. 22:15-21
Synchrotron radiation enables the observation of solidification in metallic alloys. In situ observations of solidification for Al–Cu alloys (5, 10 and 15 wt-%Cu) are reported. Nucleation and fragmentation of dendrite arms were often observed in the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::76eed768c79d06423c6befa2f4f05fa6
https://doi.org/10.1179/136404609x368118
https://doi.org/10.1179/136404609x368118
Publikováno v:
International Journal of Cast Metals Research. 21:11-16
Although there are many works on the formation mechanism of porosity defects due to solidification in ductile cast iron, the formation mechanism is still not clear and decreasing the porosity defec...
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7a3b21dd4764fe1626826af68a7df4fd
https://doi.org/10.1179/136404608x361585
https://doi.org/10.1179/136404608x361585
Autor:
Kentarou Uesugi, Akira Sugiyama, Keiji Umetani, Noriaki Nakatsuka, Hideyuki Yasuda, Tomoya Nagira, Itsuo Ohnaka, Masato Yoshiya, Y. Yamamoto
Publikováno v:
International Journal of Cast Metals Research. 21:125-128
This paper presents recent progress of in situ observation for the microstructure evolution during solidification. Nucleation and fragmentation of dendrite arms are important issues for controlling microstructure during solidification. However, there
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::e3297276edf3da7a7c68af8fbfa97e56
https://doi.org/10.1179/136404608x361800
https://doi.org/10.1179/136404608x361800
Publikováno v:
Applied Mathematical Modelling. 32(2):185-194
In the mold filling simulation, element parameters including volume filled ratio, surface dimensionless distance, and surface filled ratio, were proposed to describe the shape and location of free surfaces in DFDM (Direct Finite Difference Method) el
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::45cd780d20ebed0a0ebdf7fb02e1ce75
Autor:
Itsuo Ohnaka
Publikováno v:
Journal of the Japan Society for Precision Engineering. 73:171-174
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b083852ee7d86c62c478ef9f49b25a74
https://doi.org/10.2493/jjspe.73.171
https://doi.org/10.2493/jjspe.73.171
Autor:
Hai Dong Zhao, Itsuo Ohnaka
Publikováno v:
Materials Science Forum. :841-844
To describe the shape and location of free surfaces in the mold filling simulation, parameters including volume filled ratio, surface dimensionless distance, and surface filled ratio for the DFDM (Direct Finite Difference Method) elements were propos
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::913cbfa8f5d28a1069e19e427e7951a5
https://doi.org/10.4028/www.scientific.net/msf.532-533.841
https://doi.org/10.4028/www.scientific.net/msf.532-533.841