Zobrazeno 1 - 10
of 84
pro vyhledávání: '"Seong-Ho Ha"'
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 69, Iss No 2, Pp 425-428 (2024)
In this study, the effect of 3 mass%Cu additions on microstructure formation and Cu segregation in 800 MPa grade ductile cast iron during solidification was investigated. The calculated phase diagram showed that after the addition of 3 mass%Cu, the C
Externí odkaz:
https://doaj.org/article/0b6bf52b12504bfcb0440e76d8b6044f
Autor:
Young-Chul Shin, Seong-Ho Ha
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 69, Iss No 2, Pp 485-488 (2024)
In this study, microstructures of age-hardened 2014 Al alloy forged by cold biaxial alternate forging was investigated by transmission electron microscope. And also, the forming limits of age-hardened 2014 Al alloy were examined using both convention
Externí odkaz:
https://doaj.org/article/b939216edbd043aa9dc0627feeb139c4
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
Publikováno v:
Archives of Metallurgy and Materials, Vol vol. 68, Iss No 1, Pp 97-101 (2023)
The forming limit of AZ31 alloy, a representative Mg-Al-Zn-based wrought alloy, and the effect of severe plastic deformation (SPD) by examining the microstructure change caused by dynamic recrystallization led by high temperature and high dislocation
Externí odkaz:
https://doaj.org/article/2a7a9fbf64b148a3bf0b54b0c45c15aa
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
Publikováno v:
Metals, Vol 11, Iss 4, p 641 (2021)
In this study, the plastic anisotropy distribution of an extruded 7075 aluminum alloy thick plate was evaluated through small-cube compression tests. The extruded plate with a thickness of 15 mm was divided into five layers in order to verify the dif
Externí odkaz:
https://doaj.org/article/835e489892b043c8bacacc9126fb72ac
Autor:
Seung-Yoon Yang, Da-Bin Lee, Kweon-Hoon Choi, Nam-Seok Kim, Seong-Ho Ha, Bong-Hwan Kim, Young-Ok Yoon, Hyun-Kyu Lim, Shae K. Kim, Young-Jig Kim
Publikováno v:
Metals, Vol 11, Iss 3, p 410 (2021)
For the purpose of applying a modified 5083 alloy (New 5083M alloy) with high Mg content in various automotive sheet parts, the stretch forming behavior of the 5083M alloy was studied in tensile mode at a wide range of processing conditions. The tens
Externí odkaz:
https://doaj.org/article/eb27f3878db14e8ab87bcedfa8a1db96