Zobrazeno 1 - 10
of 67
pro vyhledávání: '"Yong Sik Ahn"'
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 69, Iss No 1, Pp 61-65 (2024)
Increasing the operating temperature and pressure of an automotive engine and reducing its weight can improve fuel efficiency and lower carbon dioxide emissions. These can be achieved by changing the engine piston material from conventional aluminum
Externí odkaz:
https://doaj.org/article/23f16c6a4f3345699e18d7a603bf9225
Autor:
Hyo-Seong Kim, Moonseok Kang, Minha Park, Byung Jun Kim, Yong-Shin Kim, Tae Young Lee, Byoungkoo Kim, Yong-Sik Ahn
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 69, Iss No 1, Pp 113-116 (2024)
In this study, the effect of rolling of 1.25Cr-1Mo-0.5V-0.3C American Iron and Steel Institute 4340 modified steel for highspeed railway brake discs on the microstructure and mechanical properties was investigated. The materials were hot-rolled at 0%
Externí odkaz:
https://doaj.org/article/8da0ecdb2fc4407cbca34f2c121d5cf0
Autor:
Im-Nam Jang, Yong-Sik Ahn
Publikováno v:
Energies, Vol 17, Iss 5, p 1113 (2024)
A sintered wick was formed in a heat pipe through the process of sintering a mixture of copper powder with particle sizes of 100 µm and 200 µm, mixed with a pore-forming agent. The heat pipe’s thermal resistance, which affects its heat transfer e
Externí odkaz:
https://doaj.org/article/7f6fab998f134db9b55d7ec194ce68fa
Autor:
Myeongji Jo, Hyo-Seong Kim, Jeong Yeol Park, Seok Goo Lee, Byung Jun Kim, Hyoung Chan Kim, Yong-sik Ahn, Byoungkoo Kim, Namhyn Kang, Daegeun Nam
Publikováno v:
Metals, Vol 12, Iss 12, p 2086 (2022)
Functionally graded materials (FGMs) have a characteristic whereby the composition and structure are gradually changed according to the location, and the mechanical properties or chemical properties are gradually changed accordingly. In this study, u
Externí odkaz:
https://doaj.org/article/0bdcb74f097e4fd496d4d9f2ffc5bd13
Autor:
Kwon-Soo Lee, Yong-Sik Ahn
Publikováno v:
Journal of Power System Engineering. 26:12-20
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73f070dc40840b5146fdc7aa7c9185d2
https://doi.org/10.9726/kspse.2022.26.4.012
https://doi.org/10.9726/kspse.2022.26.4.012
Autor:
Geon-Woo Park, Haeju Jo, Minha Park, Byung-Jun Kim, Wookjin Lee, Sunmi Shin, Sung Soo Park, Yong-Sik Ahn, Jong Bae Jeon
Publikováno v:
Metals, Vol 10, Iss 10, p 1366 (2020)
This study investigated the effect of post-weld processes including annealing and drawing on the microstructure and mechanical properties of high-Mn steel pipes welded by gas tungsten arc welding. The weld metal showed a solidified microstructure hav
Externí odkaz:
https://doaj.org/article/f14322f5b6db4958a263af6bec4fe763
Publikováno v:
Advances in Materials Science and Engineering, Vol 2018 (2018)
Ni-based superalloy Haynes 282 was developed as a gas turbine material for use in the ultra-supercritical (USC) stage of next-generation coal-fired power plants. Temperatures in the USC stage exceed 700°C during operation. Despite the important role
Externí odkaz:
https://doaj.org/article/4ad4ecef9a4f4ee1a5b9f33ae40c37a0
Autor:
Byung-Jun Yoon, Yong-Sik Ahn
Publikováno v:
Journal of Materials Engineering and Performance.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cedf87294bb153abe5cb2becebef812
https://doi.org/10.1007/s11665-022-07588-5
https://doi.org/10.1007/s11665-022-07588-5
Autor:
Byung-Jun Yoon, Yong-Sik Ahn
Publikováno v:
Journal of Materials Engineering and Performance.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::946ad3abba08c7ef69ab2d6e1ee7b399
https://doi.org/10.1007/s11665-022-07478-w
https://doi.org/10.1007/s11665-022-07478-w
Autor:
Geon-Woo Park, Haeju Jo, Minha Park, Sunmi Shin, Won-Seok Ko, Nokeun Park, Byung-Jun Kim, Yong-Sik Ahn, Jong Bae Jeon
Publikováno v:
Metals, Vol 9, Iss 11, p 1167 (2019)
This study investigated microstructure and mechanical properties of high manganese steel sheet fabricated by gas tungsten arc welding (GTAW). The weld zone showed longitudinal coarse grains due to the coalescence of columnar dendrites grown into the
Externí odkaz:
https://doaj.org/article/fcdb6b6b3b5e477b89bc0f23c728b029