Study on Semi-Solid A380 Aluminum Alloy Slurry Prepared by Water-Cooling Serpentine Channel and Its Rheo-Diecasting

Li, Yong; Mao, Weimin; Wan, Tan; Cui, Guotao; Wang, Weipan

doi:10.1007/s12540-020-00672-2

Cited by 13 publications

(6 citation statements)

References 30 publications

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“…High efficiency and lower cost preparation of fine and round semi-solid slurry was the key to metal semisolid rheological forming [22][23][24][25]. The preparation of semi-solid slurry by ICTE process was a slurry preparation process which combined low superheat casting method with strong agitation, and A large number of primary crystal nuclei were generated in the alloy melt due to the cooling of TEB.…”

Section: Discussionmentioning

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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Section: Discussionmentioning

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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“…For most alloys, the rise in liquidus temperature generated during solidification is about 10 −2 K/atm [26]. Increase in the T f value means that the sub-cooling of the alloy melt during solidification under pressure rises significantly, and the increase in sub-cooling can effectively promotes the nucleation of the alloy melt, which has a strong effect on promoting the grain refinement of the cast alloy [27].…”

Section: Effect Of Pressure On Solidification Temperaturementioning

confidence: 99%

Effect of Near-Liquidus Squeeze Casting Pressure on Microstructure and Mechanical Property of AZ91D Alloy Differential Support

Cheng

Liu

et al. 2023

Materials

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In this study, near-liquidus squeeze casting AZ91D alloy was used to prepare differential support, and the microstructure and mechanical behavior under different applied pressure were investigated. Under the preset temperature, speed, and other process parameters, the effect of applied pressure on the microstructure and properties of formed parts was analyzed, and relevant mechanism was also discussed. The results showed that the ultimate tensile strength (UTS) and elongation (EL) of differential support can be improved by controlling real-time precision of the forming pressure. The dislocation density in the primary phase increased obviously with the pressure increasing from 80 MPa to 170 MPa, and even tangles appeared. When the applied pressure increased from 80 MPa to 140 MPa, the α-Mg grains were gradually refined, and the microstructure changed from rosette to globular shape. With increasing the applied pressure to 170 MPa, the grain could not be further refined. Similarly, its UTS and EL gradually increased with the applied pressure increasing from 80 MPa to 140 MPa. With increasing to 170 MPa, the UTS tended to be constant, but the EL gradually decreased. In other words, the UTS (229.2 MPa) and EL (3.43%) of the alloy reached the maximum when the applied pressure was 140 MPa, and the comprehensive mechanical properties were the best.

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“…The pouring temperature is a key factor in the nucleation and development of primary α-Al during the formation of the semi-solid slurry. The following equation can be used to express the alloy melt's nucleation rate [27]:…”

Section: Effect Of Pouring Temperature On Slurry's Semi-solid Microst...mentioning

confidence: 99%

Microstructure and Properties of Semi-Solid 7075 Aluminum Alloy Processed with an Enclosed Cooling Slope Channel

et al. 2023

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In this study, an enclosed cooling slope channel (ECSC) was used to produce a semi-solid slurry of the 7075 aluminum alloy. The effects of the pouring temperature and the rate of cooling water on the microstructure of the semi-solid slurry were studied. The microstructure, solidification behavior, mechanical properties, and fracture mechanism of rheological squeeze casting (Rheo-SC) and liquid squeeze casting (LSC) samples were compared. The results indicate that lowering the pouring temperature and increasing the rate of cooling water can refine the crystals of the semi-solid slurry. The best process is a pouring temperature of 670 °C and a rate of cooling water of 200 L/h. The microstructure of the LSC samples was made up of coarse dendritic crystals, but the microstructure of the Rheo-SC samples was made up of almost spherical primary α1-Al and refined secondary α2-Al under this method. The ultimate tensile strength, yield strength, and elongation of the Rheo-SC samples were 238 MPa, 151 MPa, and 5.2%, respectively, which were 10%, 10.5%, and 44.4% higher than those of the LSC sample. The key factor contributing to the increased performance of the Rheo-SC samples is the combination of decreased casting flaws, strengthened grain refinement, and improved segregation.

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Study on Semi-Solid A380 Aluminum Alloy Slurry Prepared by Water-Cooling Serpentine Channel and Its Rheo-Diecasting

Cited by 13 publications

References 30 publications

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

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

Effect of Near-Liquidus Squeeze Casting Pressure on Microstructure and Mechanical Property of AZ91D Alloy Differential Support

Microstructure and Properties of Semi-Solid 7075 Aluminum Alloy Processed with an Enclosed Cooling Slope Channel

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