Preparation of semi-solid A380 aluminum alloy slurry by serpentine channel

Liu, Zhiyong; Mao, Weimin; Wang, Weipan; Zheng, Zhi-kai

doi:10.1016/s1003-6326(15)63741-4

Cited by 34 publications

(16 citation statements)

References 16 publications

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“…Tiny units, α and β, firstly flow into the spiral line and eventually flow to the end of α′ and β′, respectively. Taking α and β for analysis, the solid particles in the semisolid alloy melt roll over and collide with each other, thus the primary solid phase becomes small [3,9,19,22,23] . Along the spiral length direction, the microstructure evolution mechanism of rheological solidification is mainly affected by rheological velocity and rheological distance.…”

Section: Rheological Solidification -One Mechanism Of Microstructure mentioning

confidence: 99%

“…Lashkari [16] A380 aluminum alloy applied in this work has good fluidity, good mechanical properties and high Si content, whose chemical compositions are shown in Table 1. The solidus and liquidus temperatures of this alloy are 525 °C and 596 °C [3] , respectively. studied alloy rheological behavior and microstructure via the viscosity.…”

mentioning

confidence: 98%

“…and serpentine channel [3,10] were used to generate the semisolid slurry with nearly spherical primary Al phase.…”

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confidence: 99%

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Microstructure evolution of A380 aluminum alloy during rheological process under applied pressure

Wang

Xing

et al. 2019

China Foundry

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S queeze casting can be supposed as a combination of casting and forging [1, 2]. In this process, high pressure is applied to the melt during solidification to obtain fine grains. The essence of mold-filling and feeding is rheological solidification of the alloy melt under pressure. Microstructure evolution is inevitable in this process, which affects the mold-filling and feeding in turn. Therefore, research on microstructure evolution during the rheological process under applied pressure is extremely meaningful. A great deal of scientific research has been done on the mechanism of microstructure evolution [3-10]. The basic methods of refining microstructure are: controlling nucleation, inhibiting dendrites growth, and prompting the initial solidification nucleation [3]. Based on these ideas, various techniques, such as mechanical stirring [4] , electromagnetic stirring [5] , strain induced melt activation [6] , casting using a cooling slope [7-9]

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Section: Rheological Solidification -One Mechanism Of Microstructure mentioning

confidence: 99%

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confidence: 98%

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Microstructure evolution of A380 aluminum alloy during rheological process under applied pressure

Wang

Xing

et al. 2019

China Foundry

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“…Semi-solid metal (SSM) processing technology, a modern and advanced technology, has an advantage of fabricating metal parts with complicated structure, high quality, and improved mechanical properties [1][2][3]. It is necessary to obtain the semi-solid slurry with spherical grains during SSM processing [4]. Some preparation methods of semi-solid slurries have been developed, such as mechanical stirring [5], electromagnetic stirring [6], gas induced semi-solid [7], and the indirect ultrasonic vibration method [8].…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Solidification Behavior of a Novel Semi-Solid Alloy Slurry Prepared by Vibrating Contraction Inclined Plate

Liu

Gao

et al. 2021

Metals

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In this work, based on the A356 alloy, a novel Al–Si–Mg–Cu–Fe–Sr alloy with good mechanical property and high thermal conductivity was developed. The semi-solid slurry of the alloy was prepared via the vibrating contraction inclined plate. The microstructure evolution and solidification behavior of the alloy were investigated. The results demonstrated that, compared with the A356 alloy, the enhanced property of the Al–Si–Mg–Cu–Fe–Sr alloy was associated with the size of primary α-Al grains and morphology of eutectic Si phases. In addition, the preparation process parameters of semi-solid slurries, including the pouring temperature, inclination angle, and vibration frequency, had a crucial effect on the size and morphology of primary α-Al grains. The optimized pouring temperature, inclination angle, and vibration frequency were 670 °C, 45°, and 60 Hz, respectively. In this condition, for the primary α-Al grains, a minimum grain diameter of 64.31 µm and a maximum shape factor of 0.80 were obtained. This work provides a reference for the application of the alloy with high performance in the field of automobile and communication.

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“…[23]; that is, most microstructures of the semi-solid slurry can be retained under a certain injection pressure, the average grain diameter is increased, and the shape factor is decreased with increasing pouring temperature; however, compared with the results reported in reference [23], the average grain diameters of the spiral samples are smaller and the shape factors are higher, which may be related to the rapid solidification and to frequent impact and friction among the primary α(Al) grains during mold filling. In addition, the solid fraction of primary α(Al) grains is decreased and the number of secondary α 2 (Al) grains is increased per unit area with increasing pouring temperature, especially when the pouring temperature is greater than 630°C, as shown in Figs.…”

Section: Microstructures Of the Spiral Samplesmentioning

confidence: 99%

Investigation of rheo-diecasting mold filling of semi-solid A380 aluminum alloy slurry

Liu

Mao

Wang

et al. 2017

Int J Miner Metall Mater

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Abstract:The rheo-diecasting mold filling capacity and the microstructure of the semi-solid A380 aluminum alloy slurry were investigated. The results show that the mold filling capacity was strengthened with increasing pouring temperature or increasing injection pressure. Under certain process parameters, the mold cavity was fully filled. However, the mold filling capacity decreased with increasing holding time. The mold filling capacity was improved with increasing shape factor of primary α(Al) grains; however, the solid fraction and the grain size significantly increased at the same time. In addition, the microstructures along the route of the spiral samples obviously differed. The grain size decreased gradually from the near-end to the far-end, whereas the shape factor increased gradually.

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Preparation of semi-solid A380 aluminum alloy slurry by serpentine channel

Cited by 34 publications

References 16 publications

Microstructure evolution of A380 aluminum alloy during rheological process under applied pressure

Microstructure evolution of A380 aluminum alloy during rheological process under applied pressure

Microstructure Evolution and Solidification Behavior of a Novel Semi-Solid Alloy Slurry Prepared by Vibrating Contraction Inclined Plate

Investigation of rheo-diecasting mold filling of semi-solid A380 aluminum alloy slurry

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