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Study of the Interface between Steel Insert and Aluminum Casting in EPC 被引量:3
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作者 K.H.Choe K.S.Park +6 位作者 B.H.Kang G.S.Cho K.Y.Kim K.W.Lee m.h.kim A.Ikenaga S.Koroyasu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2008年第1期60-64,共5页
The effective surface treatment method for steel insert composited with Al base metal by expendable pattern casting (EPC) process and the bonding interface between steel insert and Al base metal were investigated.It... The effective surface treatment method for steel insert composited with Al base metal by expendable pattern casting (EPC) process and the bonding interface between steel insert and Al base metal were investigated.It was found that Zn plating on steel insert was effective on improving the bonding property between steel insert and Al base metal in EPC process.Zn is thought to promote the formation of diffusion layer.But almost none content of Zn was observed in the boundary which had been plated on the steel insert.A diffusion layer consisting of Al,Si and Fe was formed at the insert/alloy interface and its hardness was higher than the steel insert as matter of course Al base metal.This layer turned out to be intermetallic compounds of Al-Si-Fe system.Higher pouring temperature promoted the diffusion of Fe into Al alloy,so Fe content in intermetallic layers increased at higher pouring temperature.The layer nearest to steel disappeared due to applied pressure. 展开更多
关键词 Expendable pattern casting Insert casting Intermetallic compound Al-Si-Fesystem
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Dynamic Analysis for the Global Performance of An SPM-Feeder-Cage System Under Waves and Currents 被引量:2
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作者 Cristian CIFUENTES m.h.kim 《China Ocean Engineering》 SCIE EI CSCD 2015年第3期415-430,共16页
In the present study, the dynamic response of a coupled SPM-feeder-cage system under irregular waves and shear currents is analyzed. A numerical model is developed by using the commercial software Orca Flex. Hydrodyna... In the present study, the dynamic response of a coupled SPM-feeder-cage system under irregular waves and shear currents is analyzed. A numerical model is developed by using the commercial software Orca Flex. Hydrodynamics coefficients of the vessel are calculated by using a 3D diffraction/radiation panel program. First- and second-order wave forces are included in the calculations. Morison equation is used to compute the drag force on line elements representing the net. Drag coefficients are determined at every time step in the simulation considering the relative normal velocity between the structural elements and the fluid flow. The dynamic response of the coupled system is analyzed for various environments and net materials. The results of the study show the effects of solidity ratio of the net and vertical positions of the cage on the overall dynamic response of the system, confirming the viability of this type of configuration for future development of offshore aquaculture in deep waters. 展开更多
关键词 offshore aquaculture SPM(single point mooring) feeder vessel connecting lines operational/survival environment drag force equivalent net cage grouping net modeling line tensions solidity ratio
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