Zobrazeno 1 - 10
of 91
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:
Materials, Vol 17, Iss 13, p 3182 (2024)
Hot deformation constitutive analysis and processing maps of ultrasonic melt treated (UST) A5052 alloy were carried out based on a hot torsion test in this study. The addition of the Al–Ti master alloy as a grain refiner with no UST produced a fine
Externí odkaz:
https://doaj.org/article/0215e0585d304d52ab05710dffd274fa
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:
Seong-Ho Ha, Young-Chul Shin
Publikováno v:
Materials, Vol 17, Iss 5, p 968 (2024)
The deformation behavior and microstructure of 6061 aluminum alloy processed by severe plastic deformation (SPD) using biaxial alternate forging that can evaluate the forming limit and mechanical properties of alloys, simultaneously, were investigate
Externí odkaz:
https://doaj.org/article/35cedd92cbdc4a868710e5021d9d9eb7
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