Novel forging technology of a magnesium alloy impeller with twisted blades of micro-thickness

Lee, J.H.; Kang, Seong-Hoon; Yang, Dong‐Yol

doi:10.1016/j.cirp.2008.03.064

Cited by 28 publications

(18 citation statements)

References 10 publications

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“…These authors found that this forward extrusion process could be carried out without a significant loss of the mechanical properties which had been previously developed by ECAP [8]. In a study by Luis Pérez et al [9], two gears, with different modules, made of AA5083 after ECAP were obtained; an improvement in the microhardness of approximately 13.6% was observed with respect to that obtained in the gears developed by forging of the annealed AA5083, and, in a study by Lee et al [10], a magnesium alloy impeller with twisted blades and an ultrafine grain size was analysed. Some other research works have studied the effect of ECAP on the wear properties of parts manufactured in this way.…”

Section: Introductionmentioning

confidence: 86%

Experimental and FEM Analysis of Wear Behaviour in AA5083 Ultrafine-Grained Cams

Pérez

Irigoyen

Fuertes

et al. 2020

Metals

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Severe plastic deformation (SPD) processes have attracted a great deal of both scientific and technological interest over the last few years as a consequence of the improvements that are possible to obtain in the microstructure and mechanical properties of the materials manufactured through the use of these kind of processes. However, the practical applications of such materials to obtain mechanical components are significantly fewer. As a direct consequence, the same thing has been observed in the development of studies that show the in-service behaviour of the mechanical components developed in this way. Since one of the industrial objectives of these SPD processes is to obtain functional parts, it is necessary to carry out studies to fill this gap. Therefore, in this study, an analysis of the wear that cams undergo when manufactured from an AA5083 aluminium-magnesium alloy is carried out. The cams were isothermally-forged from materials with and without previous SPD processing by equal channel angular pressing (ECAP). Subsequently, the wear behaviour of these cams was analysed by using specific equipment, which may have been considered to have a block-on-ring configuration, developed for testing in-service wear behaviour of mechanical parts. From this comparative wear study with cams, it is shown that previously-processed materials by ECAP have a better wear performance. Moreover, finite element modelling (FEM) simulations were also included to predict wear in the cams processed in this way. A good agreement between FEM and experimental results was obtained. It is this aspect of performing the wear tests on functional and real mechanical components, and not on laboratory samples, which makes this present research work novel.

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Section: Introductionmentioning

confidence: 86%

Experimental and FEM Analysis of Wear Behaviour in AA5083 Ultrafine-Grained Cams

Pérez

Irigoyen

Fuertes

et al. 2020

Metals

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“…Moreover, the blade shape must be selected in a way that it can be manufactured with adequate precision and with relatively low cost on a computer numerical control (CNC) machine tool. Finally, the blade should be safe regarding its mechanical strength, thus reducing the possibility of excessive deformation or even fracture during its operation [3,4].…”

Section: Introductionmentioning

confidence: 99%

Optimization of the Manufacturing Strategy, Machining Conditions, and Finishing of a Radial Impeller

et al. 2019

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Impellers are the most crucial components of pumps, as they directly determine the velocity profile of the fluid flowing through the pump and its efficiency. Given that the impellers have a complex geometry, they pose an important challenge to the manufacturer in order to construct them with the best possible dimensional accuracy and surface quality, and also achieve short machining times. In the present paper, the machining operations for the manufacture of a radial impeller were designed and implemented for the case of a single-entry semi-closed radial flow impeller. At first, the best milling strategies, optimum cutting conditions, and appropriate cutting tools were selected for each of the three machining phases, namely, roughing, semi-finishing, and finishing. Then, an experimental investigation was conducted, especially for the optimum process conditions during finishing of impeller blades, using Taguchi L16 orthogonal array. After the analysis of surface roughness was conducted for the 16 experiments, it was found that the most important parameters were spindle speed and feed. Furthermore, the optimum settings were determined as the maximum spindle speed and the lowest feed per tooth value and a regression model correlating process parameters with surface roughness was established with a high degree of accuracy.

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“…Considerable research studies were carried out to investigate the forging process of bulk magnesium alloys [5][6][7][8]. However, only few research activities were reported on press forging of magnesium alloy thin sheets and most of the published literature is focused on the forming of bosses.…”

Section: Introductionmentioning

confidence: 99%

Press Forging of Magnesium-Alloy Notebook Case with Complex Geometry

Sun

Zhang

Tang

et al. 2010

Materials and Manufacturing Processes

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Press forging is a process for forming bosses with thin sheet metals. In this work, press forging has been applied to manufacture magnesium-alloy notebook computer case with complex geometry, such as sidewalls, bosses, and hooks. Forming characteristics, influence of process parameters on metal flow, and forming defect are investigated by using both experimental approach and the finite element method (FEM). The results show that the sidewalls, bosses, and hooks of the case can be formed synchronously. It is found that the sidewalls are not uniformly formed, and the formability of the bosses varies with the position and geometry. Due to the rotating material flow in hook cavity, material dead zone appears at the root area of the hook. The methods of increasing the resistance of material flow outwards can be used to prevent the defect in hook forming. The present study indicates that magnesium-alloy notebook case with complex geometry can be produced by press forging, and it provides a promising alternative to the electronic industry in the application of press forging process.

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Novel forging technology of a magnesium alloy impeller with twisted blades of micro-thickness

Cited by 28 publications

References 10 publications

Experimental and FEM Analysis of Wear Behaviour in AA5083 Ultrafine-Grained Cams

Experimental and FEM Analysis of Wear Behaviour in AA5083 Ultrafine-Grained Cams

Optimization of the Manufacturing Strategy, Machining Conditions, and Finishing of a Radial Impeller

Press Forging of Magnesium-Alloy Notebook Case with Complex Geometry

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