Behavior of ECAP processed copper electrodes in electrical discharge machining of AISI H13 steel

Gopal, R.; Thangadurai, K.; Thirunavukkarasu, K.

doi:10.1016/j.matpr.2019.05.443

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…The EDM process involves a wide range of phenomena, such as phase transitions [79][80][81], melt behavior [82][83][84], oxidation [36,50,85], residual stresses [86][87][88][89][90], energy transfer, absorption and dissipation [91][92][93][94], chemical reactions [75,95], microstructural changes [53,81,96], etc. The EDM process is generally based on the melting and evaporation of material under the influence of highly concentrated electrical energy, which is converted into thermal energy.…”

Section: Edm Process Physicsmentioning

confidence: 99%

“…In ceramic composites, depending on the strength of the discharge, it is possible to observe the breakage or fracture of reinforcing fibers and brittle fracture of the matrix [102]. The EDM process involves a wide range of phenomena, such as phase transitions [79][80][81], melt behavior [82][83][84], oxidation [36,50,85], residual stresses [86][87][88][89][90], energy transfer, absorption and dissipation [91][92][93][94], chemical reactions [75,95], microstructural changes [53,81,96], etc.…”

Section: Edm Process Physicsmentioning

confidence: 99%

See 1 more Smart Citation

Recent Trends and Developments in the Electrical Discharge Machining Industry: A Review

Kamenskikh,

Muratov,

Shlykov

et al. 2023

JMMP

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Electrical discharge machining (EDM) is a highly precise technology that not only facilitates the machining of components into desired shapes but also enables the alteration of the physical and chemical properties of workpieces. The complexity of the process is due to a number of regulating factors such as the material of the workpiece and tools, dielectric medium, and other process parameters. Based on the material type, electrode shape, and process configuration, various shapes and degrees of accuracy can be generated. The study of erosion is based on research into processing techniques, which are the primary tools for using EDM. Empirical knowledge with subsequent optimization of technological parameters is one of the ways to obtain the required surface quality of the workpiece with defect minimization, as well as mathematical and numerical modeling of the EDM process. This article critically examines all key aspects of EDM, reflecting both the early foundations of electrical erosion and the current state of the industry, noting the current trends towards the transition of EDM to the 5.0 industry zone in terms of safety and minimizing the impact of the process on the environment.

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Section: Edm Process Physicsmentioning

confidence: 99%

Section: Edm Process Physicsmentioning

confidence: 99%

Recent Trends and Developments in the Electrical Discharge Machining Industry: A Review

Kamenskikh,

Muratov,

Shlykov

et al. 2023

JMMP

View full text Add to dashboard Cite

show abstract

“…The machining of steels with powder-mixed EDM was also studied in the recent work of Huu [ 19 ] and Jeavudeen et al [ 20 ], where titanium powder and alumina powder was utilized, respectively. Finally, the machining of AISI H13 steel with EDM has been studied by Gopal et al [ 21 ] and Mohanty et al [ 22 ]. The effect of the machining parameters on the process was investigated, while the work of Gopal et al indicated how the pre-process of the electrode’s material may significantly impact the machining results.…”

Section: Introductionmentioning

confidence: 99%

An Optimalization Study on the Surface Texture and Machining Parameters of 60CrMoV18-5 Steel by EDM

et al. 2022

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As a non-conventional machining technology, EDM is used extensively in modern industry, particularly in machining difficult-to-cut materials. CALMAX is a chromium-molybdenum-vanadium tool steel with exceptional toughness, ductility, and wear resistance that has a wide range of applications. Despite the fact that EDM is routinely used in CALMAX machining, the related published research is brief and limited. The current research gives a complete experimental study of CALMAX machining using EDM. A Taguchi Design of Experiment (DOE) was used, using pulse-on current, pulse-on time, and open-circuit voltage as control parameters. Material Removal Rate (MRR), Tool Material Removal Rate (TMRR), and Tool Wear Ratio (TWR) were used to evaluate machining performance, while Ra and Rz were used to estimate Surface Quality (SQ). The produced White Layer (WL) parameters were determined using optical and SEM microscopy, as well as EDX measurements and micro-hardness studies. Finally, for each of the aforementioned indexes, Analysis of Variance (ANOVA) was performed, and multi-objective optimization was based on Grey Relational Analysis (GRA). The results show that higher open-circuit voltage produces lower WL thickness, although by increasing the pulse-on time, the TWR is increased. The average hardness of the WL is increased about 400% compared to the micro-hardness of the bulk material.

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“…SPD can be used to produce UFG microstructures and to deform pure and alloy materials that directly causes the improvement of both the physical and mechanical properties and the corrosion behavior of the processed materials [12,13]. Among the plethora of SPD processes available now are high-pressure torsion (HPT) [14][15][16][17], twist extrusion (TE) [18][19][20][21], accumulative roll-bonding (ARB) [22] and ECAP [12,[23][24][25]. Among these processes, the most applicable of them is ECAP, which allows for extremely large magnitudes of strain to be applied to a bulk sample through intensive simple shear; thus, ECAP is highly capable and efficient in fabricating different types of UFG and nanostructured materials (NS) [26][27][28][29].…”

Section: Introductionmentioning

confidence: 99%

Experimental and Numerical Investigation of the ECAP Processed Copper: Microstructural Evolution, Crystallographic Texture and Hardness Homogeneity

Alateyah

Ahmed

Zedan

et al. 2021

Metals

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The current study presents a detailed investigation for the equal channel angular pressing of pure copper through two regimes. The first was equal channel angular pressing (ECAP) processing at room temperature and the second was ECAP processing at 200 °C for up to 4-passes of route Bc. The grain structure and texture was investigated using electron back scattering diffraction (EBSD) across the whole sample cross-section and also the hardness and the tensile properties. The microstructure obtained after 1-pass at room temperature revealed finer equiaxed grains of about 3.89 µm down to submicrons with a high density of twin compared to the starting material. Additionally, a notable increase in the low angle grain boundaries (LAGBs) density was observed. This microstructure was found to be homogenous through the sample cross section. Further straining up to 2-passes showed a significant reduction of the average grain size to 2.97 µm with observable heterogeneous distribution of grains size. On the other hand, increasing the strain up to 4-passes enhanced the homogeneity of grain size distribution. The texture after 4-passes resembled the simple shear texture with about 7 times random. Conducting the ECAP processing at 200 °C resulted in a severely deformed microstructure with the highest fraction of submicron grains and high density of substructures was also observed. ECAP processing through 4-passes at room temperature experienced a significant increase in both hardness and tensile strength up to 180% and 124%, respectively.

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Behavior of ECAP processed copper electrodes in electrical discharge machining of AISI H13 steel

Cited by 6 publications

References 8 publications

Recent Trends and Developments in the Electrical Discharge Machining Industry: A Review

Recent Trends and Developments in the Electrical Discharge Machining Industry: A Review

An Optimalization Study on the Surface Texture and Machining Parameters of 60CrMoV18-5 Steel by EDM

Experimental and Numerical Investigation of the ECAP Processed Copper: Microstructural Evolution, Crystallographic Texture and Hardness Homogeneity

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