A review of electrically-assisted manufacturing

Nguyen-Tran, Huu Duc; Oh, Hyun Seok; Hong, Sung Tae; Han, Heung Nam; Cao, Jian; Ahn, Sung‐Hoon; Chun, Doo‐Man

doi:10.1007/s40684-015-0045-4

Cited by 119 publications

(32 citation statements)

References 90 publications

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“…Especially for large or complex products, this method increases the production costs [2,3]. While the application of electroplastic deformation technology allows the introduction of a cost effective and energy-saving manufacturing process of metal forming [4]. A new technology for improving the workability of Mg is based on the electroplastic effect and has already been applied in the work of Xu et al for electroplastic rolling of AZ31.…”

Section: Introductionmentioning

confidence: 99%

Visualization and Observation of Morphological Peculiarities of Twin Formation in Mg-Based Samples After Electrically Assisted Forming

Reschka

Gerstein

Dalinger

et al. 2019

Metallogr. Microstruct. Anal.

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By using electrically assisted forming the usually rather poor workability of magnesium can be improved. The processes taking place during these forming operations have a strong influence on the microstructure. However, the metallographic preparation of magnesium is challenging due to its low hardness and strong tendency to oxidize. Therefore, a reliable preparation method was developed that revealed the microstructural features caused by the electrically assisted forming. The different morphologies of twins caused by plastic deformation and of those caused by an electric impulse could clearly be distinguished.

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Section: Introductionmentioning

confidence: 99%

Visualization and Observation of Morphological Peculiarities of Twin Formation in Mg-Based Samples After Electrically Assisted Forming

Reschka

Gerstein

Dalinger

et al. 2019

Metallogr. Microstruct. Anal.

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“…The electroplastic effect has been shown to increase formability through increasing ductility, especially in brittle metals and reducing forming loads and springback in sheet forming [2][3][4][5][6][7][8][9][10][11]. In an effort to review the current state of the art, Nguyen-Tran et al [12] summarized different EAM processes and suggested different areas of potential improvement in modeling. Ruszkiewicz et al reviewed the existing theories of electroplastic effect and different modeling approaches in their work and suggested that the electroplastic effect was based on microscale thermal softening [13].…”

Section: Introductionmentioning

confidence: 99%

Electroplastic Drilling of Low- and High-Strength Steels

Ruszkiewicz

Gendreau

Niaki

et al. 2018

Journal of Manufacturing Science and Engineering

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When postforming machining operations are required on high-strength structural components, tool life becomes a costly issue, often requiring external softening via techniques such as laser assistance for press-hardened steel components. Electrically assisted manufacturing (EAM) uses electricity during material removal processes to reduce cutting loads through thermal softening. This paper evaluates the effect of electric current on a drilling process, termed electroplastic drilling, through the metrics of axial force, and workpiece temperature when machining mild low carbon steel (1008CR steel) and an advanced high strength press hardened steel. A design of experiment (DoE) is conducted on 1008CR steel to determine primary process parameter effects; it is found that electricity can reduce cutting loads at the cost of an increased workpiece temperature. The knowledge generated from the DoE is applied to the advanced high strength steel to evaluate cutting force reduction, process time savings, and tool life improvement at elevated feedrates. It is found that force can be reduced by 50% in high feedrates without observing catastrophic tool failure for up to ten cuts, while tool failure occurs in only a single cut for the no-current condition. Finally, the limitations of the developed model in electroplastic drilling are discussed along with future suggestions for industrialization of the method.

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“…The overall objective of this study is to determine the influence of temperature on the stretch bending quality of aluminum profiles. Since electrically assisted manufacturing has shown the advantage of modifying material properties of a metal simply by applying electricity to the metal during deformation [9], electricity was utilized to heat aluminum profiles for improving the formability and reducing the springback in this work. Firstly, stretch bending model was developed.…”

Section: Introductionmentioning

confidence: 99%

Electrically Assisted Stretch Bending of Aluminum Extruded Profile

Cao¹,

Zeng²,

Liu³

2018

MATEC Web Conf.

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Abstract. Aluminum extruded profile is widely applied in aircraft frame parts whose forming quality is directly related to the assembly accuracy, aerodynamic shape and the service life of aircraft. However, it normally faces difficulties of large springback and low forming limit while forming at room temperature by stretch bending method. Here, electricity was applied in stretch bending process to heat aluminum profile aiming at improving the formability and reducing the springback by using electrically assisted stretch bending machine which is consisted of electrical power with the capability of 10000A and 40000kN stretching force for each hydraulic cylinder. In this research, a set of uniaxial tension tests was performed at different temperature to determine the relationship between the deformation behavior of aluminum profile and temperature. Then, a series of stretch bending tests were conducted to investigate the springback law of the aluminum profile. The corresponding stretch bending parts were obtained under different conditions. The experiment results show that, the plasticity of aluminum profile can be improved when the temperature rises, and the springback of aluminum profile can be reduced even more due to the electrical heating effect compared to the cold stretch bending process. Therefore, the forming accuracy of aluminum profile can be improved in electrically assisted stretch bending process.

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A review of electrically-assisted manufacturing

Cited by 119 publications

References 90 publications

Visualization and Observation of Morphological Peculiarities of Twin Formation in Mg-Based Samples After Electrically Assisted Forming

Visualization and Observation of Morphological Peculiarities of Twin Formation in Mg-Based Samples After Electrically Assisted Forming

Electroplastic Drilling of Low- and High-Strength Steels

Electrically Assisted Stretch Bending of Aluminum Extruded Profile

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