Zobrazeno 1 - 10
of 204
pro vyhledávání: '"BONG HWAN KIM"'
Autor:
Li Jin Kim, Sujin Jung, Hee Jun Kim, Bong Hwan Kim, Kyung Joon Kwon, Yong Min Ha, Hyun Jae Kim
Publikováno v:
Scientific Reports, Vol 12, Iss 1, Pp 1-7 (2022)
Abstract In active matrix organic light emitting diode (AMOLED) displays, when a variable refresh rate is applied and the frame rate changes, the image’s color and luminance quality in AMOLED displays deteriorates. The frequency-dependent cognitive
Externí odkaz:
https://doaj.org/article/77759206f2b649afba89397a1240f371
Publikováno v:
Nuclear Engineering and Technology, Vol 47, Iss 7, Pp 939-944 (2015)
The calibration methods of neutron-measuring devices such as the neutron survey meter have advantages and disadvantages. To compare the calibration factors obtained by the shadow cone method and semi-empirical method, 10 neutron survey meters of five
Externí odkaz:
https://doaj.org/article/948fc2fc34e44c718a8b917a179074b4
Publikováno v:
Nuclear Engineering and Technology, Vol 46, Iss 2, Pp 273-280 (2014)
The spectrum weighted responses of various detectors were calculated to provide guidance on the proper selection and use of survey instruments on the basis of their energy response characteristics on the neutron fields. To yield the spectrum weighted
Externí odkaz:
https://doaj.org/article/8e1fb842c8be4413856f3b38957b9af7
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 69, Iss No 2, Pp 489-492 (2024)
Effects of Si and Mg as main elements on interface reaction between tool steel and molten Al alloy at 700°C were investigated. Pure aluminum and Al-10mass%Mg alloy showed relatively simple interfacial layers, whereas thicker, multi-layered reaction
Externí odkaz:
https://doaj.org/article/3b062e20792d43008eba407ee9b22817
Autor:
Sun-Ki Kim, Seong-Ho Ha, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim, Young-Jig Kim
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 66, Iss No 4, Pp 947-950 (2021)
Dissolution of Si in Al-5 mass%Mg alloy melt by the reduction of SiO2 and its effect on microstructure formation of the alloy after solidification were investigated. Al-5 mass%Mg alloy without silica powder had approximately 0.05 mass%Si as an impuri
Externí odkaz:
https://doaj.org/article/5d2fb037c1614c089407bf9f39ded3d8
Autor:
Seong-Ho Ha, Young-Chul Shin, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Sung-Hwan Lim, Shae K. Kim
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 66, Iss No 4, Pp 959-962 (2021)
In this study, precipitation of Ca in Al-Mg alloys containing a trace of Ca during homogenization was investigated using a transmission electron microscope (TEM) and calculated phase diagrams. TEM result indicated that the Ca-based particles found in
Externí odkaz:
https://doaj.org/article/bf43a159fc0649998f4a6d916e730fbd
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 66, Iss No 3, Pp 695-698 (2021)
Influence of Si addition on oxide layer growth of Al-6 mass%Mg alloys in molten state was investigated in this study. After melt holding for 24 h, the melt surface of only Si-free alloy became significantly bumpy, while no considerably oxidized surfa
Externí odkaz:
https://doaj.org/article/f66a96e9a2de4faf92c4297e16d19140
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 66, Iss No 3, Pp 699-702 (2021)
Effect of Cu addition on oxide growth of Al-7 mass%Mg alloy at high temperature was investigated. As-cast microstructures of Al-7 mass%Mg and Al-7 mass%Mg-1 mass%Cu alloys showed α-Al dendrites and area of secondary particles. The 1 mass%Cu addition
Externí odkaz:
https://doaj.org/article/e0b0b9bbc30843e79429b6537893c80f
Autor:
Abdul Wahid Shah, Seong-Ho Ha, Jabir Ali Siddique, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim
Publikováno v:
Materials, Vol 16, Iss 12, p 4384 (2023)
The objective of this study was to examine the impact of varying magnesium levels in the α-Al + S + T region of the Al-Cu-Mg ternary phase diagram on the solidification process, microstructure development, tensile properties, and precipitation harde
Externí odkaz:
https://doaj.org/article/a7b21a54e25e4113b259b1f1af0c9dfa
Autor:
Abdul Wahid Shah, Seong-Ho Ha, Jabir Ali Siddique, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim
Publikováno v:
Materials, Vol 16, Iss 7, p 2783 (2023)
The aim of this study was to investigate the impact of the addition of a minor quantity of Si on the microstructure evolution, heat treatment response, and mechanical properties of the Al–4.5Cu–0.15Ti–3.0Mg alloy. The microstructure analysis of
Externí odkaz:
https://doaj.org/article/dea6b3adb7be463196f11a8d0d399242