IMPROVEMENT OF SURFACE QUALITY OF Ti-6Al-4V ALLOY BY POWDER MIXED ELECTRICAL DISCHARGE MACHINING USING COPPER POWDER

Haque, Rafiqul; Sekh, Mukandar; Kibria, Golam; Haidar, Shamim

doi:10.22190/fume201215042h

Cited by 10 publications

(3 citation statements)

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“…The importance of surface roughness in additive manufactured parts is greatly documented in scientific papers [22]. Dong et al [23] investigated how electrochemical polishing and chemical etching methods, used as post-process treatments, improve the surface finish of lattice structures made from Ti6Al4V manufactured with direct metal laser sintering (DMLS).…”

Section: Introductionmentioning

confidence: 99%

Stiffness of Anatomically Shaped Lattice Scaffolds Made by Direct Metal Laser Sintering of Ti-6Al-4V Powder: A Comparison of Two Different Design Variants

Turudija,

Stojković,

Stojković

et al. 2024

Metals

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The modern approach to the recovery of damaged and missing bone tissue is increasingly focused on the application of implants capable of supporting the growth and recovery of parent tissue, rather than replacing the tissue itself. In this regard, the primary task of modern bone implants is to enable the targeted deformation of the implant against the expected load that that piece of bone should bear. The paper presents research related to anatomically shaped lattice scaffolds (ASLSs) made by the direct metal laser sintering (DMLS) of Ti-6Al-4V powder, and refers to the influence of the crossing angle between the outer lattice struts on the rigidity of the scaffold structure. The study includes the measurement of the deformation of two ASLSs designed for the same missing piece of rabbit tibia; these differed in terms of the crossing angle of the struts in the outer lattice and were exposed to quasi-uniaxial compression. The results show that the ASLS with outer struts that intersect at 60° (the angle between the compression direction and the strut axes is 30°) is more flexible compared to the ASLS with outer struts that intersect at 90° (the compression direction and the strut axes are colinear), even though its porosity is lower and volume is bigger.

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Section: Introductionmentioning

confidence: 99%

Stiffness of Anatomically Shaped Lattice Scaffolds Made by Direct Metal Laser Sintering of Ti-6Al-4V Powder: A Comparison of Two Different Design Variants

Turudija,

Stojković,

Stojković

et al. 2024

Metals

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“…A surface roughness of 3.29 µm was obtained at a machining combination of a 120 µs spark duration, an 8 A current, and a 40 µs spark-off duration. A few more important past attempts highlight the capabilities of electric discharge machining and its variants for machining stainless steel and titanium-type difficult-to-machine materials [21,22].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research on Surface Quality of Titanium Rod Turned by Wire Electrical Discharge Turning Process

Chaubey

Gupta

2023

Materials

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This paper reports the surface quality of a miniature cylindrical titanium rod/bar (MCTB) turned by the wire electrical discharge turning (WEDT) process using a zinc-coated wire of 250 µm diameter. The surface quality was mainly evaluated by considering the very important surface roughness parameters, i.e., the mean roughness depth. A Box–Behnken design (BBD) of the response surface methodology (RSM) based on 17 experimental runs was conducted, where the spark duration “Ton” was found as the most influential parameter affecting the mean roughness depth “RZ” of the miniature titanium bar. Further, using the grey relational analysis (GRA) technique of optimization, we obtained the least value of “RZ” 7.42 µm after machining a miniature cylindrical titanium bar with the optimum combination of WEDT’s variable parameters: Ton—0.9 µs, SV—30 V, and DOC—0.35 mm. This optimization led to a 37% reduction in the surface roughness Rz of the MCTB. The tribological characteristics of this MCTB were also found favorable after conducting a wear test. After completing a comparative study, we can claim that our results are better than those of the past research conducted in this area. The findings of this study are beneficial for the micro-turning of cylindrical bars made from a variety of difficult-to-machine materials.

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“…They reported that the PMEDM is suitable for machining MMCs with ceramic reinforcements. The PMEDM also improved the surface properties of MMCs.Haque et al [18] investigated the effect of Cu powder concentration on PMEDM machining of Ti-6Al-4V alloy. The results indicated that the Cu powder concentration has a positive effect on the surface finish till an optimum value of 4 g l −1 .…”

Section: Introductionmentioning

confidence: 99%

The effect of discharge energy and nano Al₂O₃on μED milling of Inconel 718

Elumalai¹,

Gowri²,

Hariharan³

et al. 2021

Surf. Topogr.: Metrol. Prop.

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Micro EDM is a well-recognized machining process for complex and precise three-dimensional micro features. However, the disadvantages are high machining time, poor surface finish, and a thick recast layer that restricts the wide establishments. Powder mixed EDM (PMEDM) is a recent advancement in the EDM process that enhances the sparking frequency and inter-electrode gap. This paper presents the effect of Al2O3 nanopowder on micro ED milling of Inconel 718 at chosen levels of discharge energy (3.2 μJ to 7.2 μJ, 32 μJ to 72 μJ and 320 μJ to 720 μJ). To understand the dynamics of the process, comprehensive experimental research was carried out using a full factorial design with 60 experiments. Material removal rate, tool wear rate, and surface finish were evaluated. The surface topography and material migration to the machined surface was also studied. The results showed significant improvement of 157%, 20%, and 21% in MRR, TWR, and surface roughness respectively in nanopowder mixed micro-EDM when compared with conventional micro-EDM. The addition of Al2O3 nanopowder reduced crater size in all three discharge energy ranges and reduced carbon deposition on the machined surface.

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IMPROVEMENT OF SURFACE QUALITY OF Ti-6Al-4V ALLOY BY POWDER MIXED ELECTRICAL DISCHARGE MACHINING USING COPPER POWDER

Cited by 10 publications

References 0 publications

Stiffness of Anatomically Shaped Lattice Scaffolds Made by Direct Metal Laser Sintering of Ti-6Al-4V Powder: A Comparison of Two Different Design Variants

Stiffness of Anatomically Shaped Lattice Scaffolds Made by Direct Metal Laser Sintering of Ti-6Al-4V Powder: A Comparison of Two Different Design Variants

Experimental Research on Surface Quality of Titanium Rod Turned by Wire Electrical Discharge Turning Process

The effect of discharge energy and nano Al₂O₃on μED milling of Inconel 718

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IMPROVEMENT OF SURFACE QUALITY OF Ti-6Al-4V ALLOY BY POWDER MIXED ELECTRICAL DISCHARGE MACHINING USING COPPER POWDER

Cited by 10 publications

References 0 publications

Stiffness of Anatomically Shaped Lattice Scaffolds Made by Direct Metal Laser Sintering of Ti-6Al-4V Powder: A Comparison of Two Different Design Variants

Stiffness of Anatomically Shaped Lattice Scaffolds Made by Direct Metal Laser Sintering of Ti-6Al-4V Powder: A Comparison of Two Different Design Variants

Experimental Research on Surface Quality of Titanium Rod Turned by Wire Electrical Discharge Turning Process

The effect of discharge energy and nano Al2O3on μED milling of Inconel 718

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The effect of discharge energy and nano Al₂O₃on μED milling of Inconel 718