A review of electrically assisted heat treatment and forming of aluminum alloy sheet

Dong, Haitao; Li, Xiaoqiang; Li, Yong; Wang, Yihan; Wang, Haibo; Peng, Xingyi; Li, Dongsheng

doi:10.1007/s00170-022-08996-6

Cited by 25 publications

(4 citation statements)

References 95 publications

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“…As a result, energy costs for forming parts can be saved compared to traditional methods of processing materials by pressure. In recent years, research on EPE has become increasingly popular [3][4][5][6] since this effect has found applications in various industries. Due to the skin effect [7], a non-thermal reduction in flow stress can be observed in relatively thin workpieces in such manufacturing processes as drawing [8,9], rolling [10,11], stamping [12], forging [13,14], cutting [15], and forming [5,6,[16][17][18][19].…”

Section: Introductionmentioning

confidence: 99%

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Dmitriev,

Morkina,

Tarov

et al. 2024

Spec. Mech. Eng. Oper. Res.

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High-density electric current pulses increase the plasticity and reduce the yield stress of metals with negligible heat generation. This effect has great potential for the development of energy-saving technologies for processing hard-to-deform metallic materials. Despite the long history of the study of electroplasticity, there is still no consensus on the physical nature of this effect. In this paper, the effect of repetitive pulses applied at the same or gradually increasing tensile stress on the plastic deformation of copper wire is investigated using a home-made experimental setup. The electroplasticity of the wire in the delivery state and after annealing is compared. It is shown that for a constant tensile stress, the incremental plastic deformation of the wire decreases with each successive pulse. This effect is stronger for annealed wires because they have a lower dislocation density and therefore a lower plasticity resource. The Joule heat release in the specimen and the heating due to plastic deformation are evaluated. The results obtained will be used to fit the parameters of the atomistic model being developed to describe the interaction of electron flow with dislocations.

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Section: Introductionmentioning

confidence: 99%

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Dmitriev,

Morkina,

Tarov

et al. 2024

Spec. Mech. Eng. Oper. Res.

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“…Electrically-Assisted Forming (EAF) is proposed as an alternative method to the warm and hot forming methods. It is commonly known that the application of current pulses during plastic forming of metals can significantly increase their formability, reduce flow stress, and avoid or reduce some of the above-mentioned drawbacks [5][6][7]. Jeong et al [8] showed that the application of current pulses during tension can increase the material elongation by over 200% in the case of the 5052-H32 aluminium alloy (AA) [9] and the as-extruded AZ91 magnesium alloy.…”

Section: Introductionmentioning

confidence: 99%

Electrically-assisted deep drawing of 5754 aluminium alloy sheet

Dobras

2023

Materials Research Proceedings

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Abstract. The effect of current pulse application on the mechanical behaviour and plasticity of the 5754 aluminium alloy was studied. Tensile and deep drawing tests were conducted. The 5754 aluminium alloy in two different states of hardening was used: H111 and H22. The results show that the application of current pulses can significantly increase the plasticity of the examined alloys in the case of the tensile test. The dynamic recovery process is the main process responsible for the increase in plasticity of the material. However, in the case of the deep drawing process, it was observed that the increase in the material formability is low, and further studies are needed.

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“…The global aluminum market is expected to grow annually by 5.8%, stimulated by an increasing demand for aluminum products, such as sheets and coils, in the automotive industry. Aluminum alloys have low density, good corrosion resistance, a high strengthto-weight ratio and good ductility [1,2]. For these reasons, aluminum is the second most used metal in the modern economy, finding applications not only in transportation sector but also in packaging and buildings [3].…”

Section: Introductionmentioning

confidence: 99%

Improved Waste Heat Management and Energy Integration in an Aluminum Annealing Continuous Furnace Using a Machine Learning Approach

Andayesh,

Flórez-Orrego,

Germanier

et al. 2023

Entropy

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Annealing furnaces are critical for achieving the desired material properties in the production of high-quality aluminum products. In addition, energy efficiency has become more and more important in industrial processes due to increasing decarbonization regulations and the price of natural gas. Thus, the current study aims to determine the opportunities to reduce energy consumption in an annealing continuous furnace and the associated emissions. To this end, the heat transfer phenomenon is modeled and solutions for the decreasing fuel consumption are evaluated so that the overall performance of the process is enhanced. A heat transfer model is developed using the finite difference method, and the heat transfer coefficient is calculated using machine learning regression models. The heat transfer model is able to predict the heat transfer coefficient and calculate the aluminum temperature profile along the furnace and the fuel consumption for any given operating condition. Two solutions for boosting the furnace exergy efficiency are evaluated, including the modulation of the furnace temperature profiles and the energy integration by the recycling of exhaust flue gases. The results show that the advanced energy integration approach significantly reduces fuel consumption by up to 20.7%. Sensitivity analysis demonstrates that the proposed strategy can effectively reduce fuel consumption compared with the business-as-usual scenario for a range of sheet thicknesses and sheet velocities.

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A review of electrically assisted heat treatment and forming of aluminum alloy sheet

Cited by 25 publications

References 95 publications

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Effect of Repetitive High-Density Current Pulses on Plastic Deformation of Copper Wires under Stepwise Loading

Electrically-assisted deep drawing of 5754 aluminium alloy sheet

Improved Waste Heat Management and Energy Integration in an Aluminum Annealing Continuous Furnace Using a Machine Learning Approach

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