Zobrazeno 1 - 10
of 40
pro vyhledávání: '"Kyeong Hwan Choe"'
Publikováno v:
Advances in Materials Science and Engineering, Vol 2020 (2020)
Pressure of the kinetic zone is an essential factor for making defect-free castings in lost-foam casting process. The extremely high pressure causes many problems, such as reducing the melt velocity and inclusion of residual decomposition of the patt
Externí odkaz:
https://doaj.org/article/a64b67a72c654ece9f0e00bbc5fbd72c
Publikováno v:
Korean Journal of Metals and Materials. 61:18-27
The main components of molding sand used in sand casting are sand, clay and water. The composition of the molding sand has a great influence on the properties of the casting. In order to obtain high-quality castings, it is important to manage the com
Publikováno v:
Journal of Materials Research and Technology, Vol 12, Iss, Pp 818-830 (2021)
The effect of electric current on the refinement of pure aluminum during solidification was investigated based on microstructural observations and numerical simulations. Coarse columnar grains are observed without the application of direct current (D
Publikováno v:
International Journal of Metalcasting. 13:450-462
The present study aims to estimate the variability in the tensile properties of the A5052 aluminium alloy processed through ultra-high-density sonication. An in-depth look at the quality index of the tensile properties to microporosity variations thr
Publikováno v:
Journal of Korea Foundry Society. 37:31-37
Autor:
Changhyun Jin, Kyeong-Hwan Choe, Taek Kyun Jung, Ali Mirzaei, Han Gil Na, Hyoun Woo Kim, Ji-Hyun Beck, Myung Sik Choi, Min Ryou, Soong Keun Hyun, Ji-Woon Lee
Publikováno v:
Journal of Alloys and Compounds. 695:715-720
TeO 2 nanowires with diameters ranging from a few tens to hundreds of nanometers and lengths of a few tens of micrometers were prepared by thermal evaporation of Te powder with a Co catalyst. Initially, bead-like γ-TeO 2 nanoparticles on the surface
Publikováno v:
International Journal of Refractory Metals and Hard Materials. 60:52-57
The creep behavior of high purity molybdenum (99.995 wt.%) is investigated at temperatures of 1600 to 2000 °C (0.61–0.77 T m ) by direct ohmic heating. The stress and temperature dependency of creep strain and rupture time are described through op
Publikováno v:
Journal of Korea Foundry Society. 36:153-158
Publikováno v:
Korean Journal of Metals and Materials. 54:559-565
Publikováno v:
Applied Mechanics and Materials. :205-211
The effect of silicon (Si) on the stability of heat-resistant ductile iron having ferrite matrix in high temperature was investigated by dilatometric test. Microstructure of heat-resistant ferritic ductile iron consists of ferrite, eutectic carbide a