Effects of different holding pressures on the microstructure and mechanical properties of Al-5.9Zn-2.2Mg-1.8Cu alloy

Yan, Xuanjie; Tan, Pan; Sui, Yudong; Jiang, Yehua; Wang, Qudong

doi:10.1016/j.jallcom.2021.162367

Cited by 5 publications

(2 citation statements)

References 28 publications

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“…With the increase in the holding pressure, this will speed up the heat transfer between the casting and the mold during the solidification process, shorten the solidification time, and make the structure denser, but too high holding pressure will also affect the surface roughness and dimensional accuracy of the casting, so it is necessary to set the holding pressure reasonably [ 26 ]. Based on Huang et al [ 27 ]’s idea of reducing hub defects by pressurizing the hub locally, this paper selects a large range of holding pressures to explore the influence of holding pressure on hub castings.…”

Section: Methodsmentioning

confidence: 99%

Multi-Objective Optimization of The Low-Pressure Casting of Large-Size Aluminum Alloy Wheels through a Systematic Optimization Idea

He,

Lu,

et al. 2023

Materials

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The process parameters in the low-pressure casting of large-size aluminum alloy wheels are systematically optimized in this work using numerical casting simulation, response surface methodology (RSM), and genetic algorithm (NSGA-II). A nonlinear input–output relationship was established based on the Box–Behnken experimental design (BBD) for the crucial casting parameters (pouring temperature, mold temperature, holding pressure, holding time), and response indicators (defect volume fraction, spokes large plane mean secondary dendrite spacing (SDAS)), and a mathematical model was developed by regression analysis. The Isight 2017 Design Gateway and NSGA-II algorithm were used to increase the population and look for the best overall solution for the casting parameters. The significance and predictive power of the model were assessed using ANOVA. Casting numerical simulation was used to confirm the best option. To accomplish systematic optimization in its low-pressure casting process, the mold cooling process parameters were adjusted following the local solidification rate. The results showed that the mathematical model was reliable. The optimal solutions were a pouring temperature of 703 °C, mold temperature of 409 °C, holding pressure of 1086 mb, and holding time of 249 s. The mold cooling process was further optimized, and the sequence solidification of the optimal solution was realized under the optimized cooling process. Finally, the wheel hub was manufactured on a trial basis. The X-ray detection, mechanical property analysis, and metallographic observation showed that the wheel hub had no X-ray defects and its mechanical properties were well strengthened. The effectiveness of the system optimization process scheme was verified.

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Section: Methodsmentioning

confidence: 99%

Multi-Objective Optimization of The Low-Pressure Casting of Large-Size Aluminum Alloy Wheels through a Systematic Optimization Idea

He,

Lu,

et al. 2023

Materials

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“…The higher strength and ductility of squeeze cast components can be achieved through an appropriate selection of optimal parameters (i.e., pressure and temperature) and the homogeneous distribution of the reinforcing/alloying particles over the matrix. More so, heat treatment can also impact on the strength and ductility of squeeze cast components [83,99,100] . The particle segregation results in defective microstructure, which decreases the strength and percentage elongation of squeeze cast components.…”

Section: Strength and Ductilitymentioning

confidence: 99%

Squeeze casting for metal alloys and composites: An overview of influence of process parameters on mechanical properties and microstructure

2022

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Over the years, squeeze casting technology has progressed from small to large-scale commercial applications. It has been employed in the production of varieties of products ranging from household items to high integrity structural components. This process is suitable for small components weighing up to 30 kg. Currently, parts such as brake calipers, suspension arms, pistons, connecting rods, and automotive wheels, etc., can be produced by squeeze casting [1][2][3] . The squeeze casting has been successfully used to fabricate metallic alloys, bimetals and metal matrix composites (MMC) [4][5][6][7][8][9] . Squeeze casting process involves the solidification of molten metal in a preheated die under squeeze pressure. Substantial material saving, the ability to deal with a wide range of materials, and near-net-shape fabrication are the significant benefits of squeeze casting process [2,[10][11][12] .

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Coordinated deformation and high formability mechanisms of 7A36 aluminum alloy by Sc micro-alloying and low-frequency electromagnetic casting

Yang¹,

Chen²,

Yu³

et al. 2023

Journal of Materials Research and Technology

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Effects of different holding pressures on the microstructure and mechanical properties of Al-5.9Zn-2.2Mg-1.8Cu alloy

Cited by 5 publications

References 28 publications

Multi-Objective Optimization of The Low-Pressure Casting of Large-Size Aluminum Alloy Wheels through a Systematic Optimization Idea

Multi-Objective Optimization of The Low-Pressure Casting of Large-Size Aluminum Alloy Wheels through a Systematic Optimization Idea

Squeeze casting for metal alloys and composites: An overview of influence of process parameters on mechanical properties and microstructure

Coordinated deformation and high formability mechanisms of 7A36 aluminum alloy by Sc micro-alloying and low-frequency electromagnetic casting

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