Model for Predicting Radial Temperature Distribution of Semi-Solid Slug Produced by Swirled Enthalpy Equilibration Device (SEED) Process

Luo, Min; Li, Daquan; Midson, Stephen P.; Qu, Wenying; Zhu, Qiang; Fan, Jie

doi:10.1016/j.jmatprotec.2019.05.017

Cited by 16 publications

(9 citation statements)

References 13 publications

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“…The decrease in Si content in the surrounding matrix, compared to the as-rheocast condition, is a result of the precipitation of Si particles during heat treatment. Similar results were also observed for Al-7Si-Mg [30] and Al-9Si-3Cu [13] alloys. In addition, the average concentration of Mg in the matrix increases owing to the dissolution of Mg-containing phases, as presented in Fig.…”

Section: 2supporting

confidence: 87%

“…In addition, with the increase of swirl duration, the small grains would dissolve, while big size grains keep growing via the Ostwald ripening mechanism. In order to further improve the efficiency of SEED process, the process and equipment were optimized at General Research Institute for Nonferrous Metals (GRINM GROUP, China), based on deep understanding of thermodynamics and kinetic mechanisms of solidification process during the slurry preparation [13]. The modified SEED process can significantly decrease the radial temperature gradient of the melt because of the slow cooling rates, facilitating more uniform slurry and more spherical microstructure.…”

mentioning

confidence: 99%

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Microstructure, Segregation and Mechanical Properties of A356 Alloy Components Fabricated by Rheo-Hpdc Combined with the Swirled Enthalpy Equilibration Device (Seed) Process

Xiang

Li³

et al. 2023

Preprint

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Section: 2supporting

confidence: 87%

mentioning

confidence: 99%

Microstructure, Segregation and Mechanical Properties of A356 Alloy Components Fabricated by Rheo-Hpdc Combined with the Swirled Enthalpy Equilibration Device (Seed) Process

Xiang

Li³

et al. 2023

Preprint

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“…Rheocasting as a short process near-net shape technology to achieve substitution of aluminium for steel and iron has a huge potentiality to enhance its casting performance and material properties, which can satisfy the urgent requirements for high comprehensive performance, high reliability, lightweight and complex thin wall shaped aluminium alloys in the fields of automotive, new infrastructure, aerospace, and so on [1][2][3][4][5][6]. The rheocasting can mainly be classified, according to the solid fraction of semisolid slurry used, into low solid fraction counterpart and high solid fraction counterpart.…”

Section: Introductionmentioning

confidence: 99%

Microstructure evolution in semi-solid A356 aluminium alloy treated by ICTE process

Guo

et al. 2023

Materials Science and Technology

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The effects of parameters of a novel internal cooling thermal equilibrium (ICTE) process on microstructure evolution in semi-solid A356 aluminium alloys were investigated. The results indicated that a low predetermined temperature ( T P), a higher mechanical stirring intensity for the thermal equilibrium body (TEB) and a reduced melt mass contributed to obtaining fine grained semi-solid structures. The cooling effect of TEB combined with dendritic remelting fractures of solidified shells formed on surface of TEB at room temperature promoted massive nucleation in alloy melt and contributed to obtaining numerous fine primary solid phases. The ICTE process, which regulated stirring time of TEB, obtained numerous spherical grains and simplified the operational process.

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“…For SSM alloy, the SEED process was chosen to make the slurry. Based on our previous study [8], the slurry was prepared with an eccentric rotary velocity of 180 rpm and swirling time for 90s. Then, the slurry was also transferred to the die casting machine for injection into the mold.…”

Section: Introductionmentioning

confidence: 99%

A Comparative Study on Microstructure, Mechanical Property, and Electrical Conductivity of Al-7Si-0.6Mg Alloy Produced by High Pressure Die Casting and Semisolid Die Casting

Feng,

Zhu,

Chen

et al. 2023

SSP

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Two casting technologies were introduced to fabricate the Al-7Si-0.6Mg alloy, including high pressure die casting (HPDC) and semi-solid die casting (SSM). The microstructure and mechanical property were studied by optical microscopy (OM), scanning electron microscopy (SEM), X-Ray diffraction (XRD), microhardness and tensile test. The electrical conductivity was also introduced to evaluate the thermal conductivity of the alloys. Results show that the as-cast microstructure of the HPDC alloy and SSM alloy both consists of primary α-Al, eutectic Si and Mg2Si phase. The primary α-Al phase in HPDC alloy possesses fine equiaxed dendrite structure with an average grain size of 29.4 μm. While the SSM alloy forms abundant coarse and globular structure α-Al phase, and the average grain size reaches 98.9 μm. This is because of the lower cooling rate during slurry preparation promotes the formation of a relative coarse microstructure in the SSM alloy. Furthermore, the increased content of eutectic Mg2Si phase was also detected in the SSM alloy. Therefore, the average yield strength and ultimate tensile strength decreases from 148 MPa and 275 MPa of the HPDC alloy to 140 MPa and 254 MPa of the SSM alloy, respectively. However, the elongation and electrical conductivity of the SSM alloy both increases from 5.8±1.3% and 20.0±0.1 MS/m of the HPDC alloy to 7.5±1.2% and 20.6±0.1 MS/m, respectively.

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Model for Predicting Radial Temperature Distribution of Semi-Solid Slug Produced by Swirled Enthalpy Equilibration Device (SEED) Process

Cited by 16 publications

References 13 publications

Microstructure, Segregation and Mechanical Properties of A356 Alloy Components Fabricated by Rheo-Hpdc Combined with the Swirled Enthalpy Equilibration Device (Seed) Process

Microstructure, Segregation and Mechanical Properties of A356 Alloy Components Fabricated by Rheo-Hpdc Combined with the Swirled Enthalpy Equilibration Device (Seed) Process

Microstructure evolution in semi-solid A356 aluminium alloy treated by ICTE process

A Comparative Study on Microstructure, Mechanical Property, and Electrical Conductivity of Al-7Si-0.6Mg Alloy Produced by High Pressure Die Casting and Semisolid Die Casting

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