Estimating surface roughness for different EDM processing parameters on Inconel 718 using GEP and ANN

Özkavak, Hatice Varol; Sofu, Mehmet Mahir; Duman, Burhan; Bacak, Selim

doi:10.1016/j.cirpj.2021.04.007

Cited by 45 publications

(17 citation statements)

References 26 publications

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Section: Introductionmentioning

confidence: 99%

“…For example, 50% of the weight of a jet engine is Inconel 718 (IN718). IN718 – it is in the “hard to machine” material group due to its toughness, deformation-hardening tendency and resistance to shearing caused by shear stress (Varol Ozkavak et al. , 2021).…”

Section: Introductionmentioning

confidence: 99%

“…Nickel-based materials are commonly used in the aerospace, medical, nuclear and chemical industries thanks to their exceptional resistance to creep, corrosion and thermal fatigue at high-level temperatures (Wang et al, 2013;Varol Ozkavak et al, 2021). Nickel alloys are preferred for use in turbine sections of jet engines, as they perfectly preserve their mechanical and chemical properties even after exposure to extremely high temperatures (Ulutan and Ozel, 2011).…”

Section: Introductionmentioning

confidence: 99%

“…For example, 50% of the weight of a jet engine is Inconel 718 (IN718). IN718it is in the "hard to machine" material group due to its toughness, deformation-hardening tendency and resistance to shearing caused by shear stress (Varol Ozkavak et al, 2021). It is known that non-traditional manufacturing methods are often used for cutting such difficultto-machine materials.…”

Section: Introductionmentioning

confidence: 99%

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Wire EDM cutting of Inconel 718 nickel-based superalloy: kerf and MRR analysis

Karataş

2022

MMMS

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PurposeInconel 718 (IN718) is a high-performance nickel-based superalloy with high oxidation-corrosion-temperature resistance, high strength (tensile, fatigue, creep and rupture), durability, toughness, hardness and dimensional stability, which is difficult to machine with traditional fabrication methods. To overcome these difficulties, wire electrical discharge machining (WEDM), one of the modern manufacturing methods, is used.Design/methodology/approachMain performance criteria in WEDM; material removal rate (MRR), cutting speed, surface roughness, cutting width (kerf) and wire wear rate. In this study, the effect of processing parameters on kerf and MRR because of processing IN718 in WEDM was investigated. Machining parameters, voltage, wire feed rate and dielectric fluid pressure were determined. Deionized water was used as a dielectric fluid and 0.3 mm brass wire was used as wire in the experiments. Gray Relational Analysis (GRA), which is one of the multi-criteria decision-making methods, has been applied for the optimization of the machining parameters in the cutting process with the WEDM. Analysis of variance (ANOVA) was used to determine the effect percentages of the cut-off parameters.FindingsThe parameter with the highest effect was determined as tension with a rate of 76.95% for kerf and 91.21% for MRR.Originality/valueThe novel approach uses Taguchi-based GRA optimization as a result of cutting IN718 with WEDM, reducing cost and time consumption.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wire EDM cutting of Inconel 718 nickel-based superalloy: kerf and MRR analysis

Karataş

2022

MMMS

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“…Giridharan et al propose the so-called anode model, which assumes that the energy reaching the workpiece is the key factor in crater formation and that the crater diameter is proportional to the discharge energy [ 21 ]. Other studies indicate proportional relationships between discharge energy and crater volume [ 22 ], area [ 23 ], diameter [ 24 ] or size [ 25 ]. Ding et al showed that in microwire electrical discharge machining, the spark energy has a direct influence on both the average diameter and the maximum depth of craters.…”

Section: Introductionmentioning

confidence: 99%

Influence of EDM Process Parameters on the Surface Finish of Alnico Alloys

Bańkowski

Młynarczyk

2022

Materials

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This article deals with electrical discharge machining (EDM) of an alnico alloy, focusing on how key process parameters affect the surface finish. The experiments were conducted using a BP93L EDM machine. The Box–Behnken design was employed to study the effects of three factors, i.e., spark current, pulse-on time, and pulse-off time, each at three levels, on the surface quality. A specially designed system was employed to increase the effectiveness of the machining process by imparting an additional rotary motion to the tool and an additional rotary motion to the workpiece. The aim was to efficiently remove the eroded metal particles and create a surface with smaller craters. The workpiece surface roughness was measured with a Talysurf CCI lite non-contact profiler. During this precision machining process, the arithmetical mean height (Sa) was less than 1 µm. The surface quality was examined also using scanning electron microscopy (SEM) and optical microscopy (OM). The experimental data were analyzed by means of Statistica to determine and graphically represent the relationships between the input and output parameters.

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