Investigation on performance of a copper coated hollow rapid electrode during electrical discharge machining

Reddy, R. Durga Prasad; Sahu, Anshuman Kumar; Mahapatra, Siba Sankar

doi:10.1007/s12046-022-01947-7

Cited by 8 publications

(3 citation statements)

References 37 publications

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“…Additionally, the initial investment in 3D printing tools and equipment was expensive, driving up the cost of fabricating scaffolds (Zhou et al , 2022). To overcome these limitations of metal 3D printing, some indirect solid freeform or rapid tooling (Karunakaran et al , 2012; Reddy et al , 2022) production methods were adopted, which incorporated all the advantages of 3D printing at low fabrication costs. These methods integrated fused deposition modeling (FDM), stereolithography apparatus and other economic polymer 3D printers with traditional manufacturing procedures like casting and sintering (Kirkland et al , 2009; Nguyen et al , 2011; Cockerill et al , 2020).…”

Section: Introductionmentioning

confidence: 99%

Mapping the structural properties of zinc scaffold fabricated via rapid tooling for bone tissue engineering applications

Kansal

Dvivedi

Kumar

2023

RPJ

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Purpose The purpose of this study to investigate the organized porous network zinc (OPNZ) scaffolds. Their mechanical characteristics, surface roughness and fracture mechanism were assessed in relation to their structural properties. The prospects of fused deposition modeling (FDM) for printing metal scaffolds via rapid tooling have also been studied. Design/methodology/approach Zn scaffolds with different pore and strut sizes were manufactured via the rapid tooling method. This method is a multistep process that begins with the 3D printing of a polymer template. Later, a paraffin template was obtained from the prepared polymer template. Finally, this paraffin template was used to fabricate the Zn scaffold using microwave sintering. The characterization of prepared Zn samples involved structural characterization, microstructural study, surface roughness testing and compression testing. Moreover, based on the Gibson–Ashby model analysis, the model equations’ constant values were evaluated, which can help in predicting the mechanical properties of Zn scaffolds. Findings The scanning electron microscopy study confirmed that the fabricated sample pores were open and interconnected. The X-ray diffraction analysis revealed that the Zn scaffold contained hexagonal closed-packed Zn peaks related to the a-Zn phase, validating that scaffolds were free from contamination and impurity. The range for ultimate compressive strength, compressive modulus and plateau stresses for Zn samples were found to be 6.75–39 MPa, 0.14–3.51 GPa and 1.85–12.6 MPa by adjusting their porosity, which are comparable with the cancellous bones. The average roughness value for the Zn scaffolds was found to be 1.86 µm. Originality/value This research work can widen the scope for extrusion-based FDM printers for fabricating biocompatible and biodegradable metal Zn scaffolds. This study also revealed the effects of scaffold structural properties like porosity, pore and strut size effect on their mechanical characteristics in view of tissue engineering applications.

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Section: Introductionmentioning

confidence: 99%

Mapping the structural properties of zinc scaffold fabricated via rapid tooling for bone tissue engineering applications

Kansal

Dvivedi

Kumar

2023

RPJ

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“…However, its importance rose phenomenally by virtue of its customizable and reproducible capabilities along with the potential to create products with extensive complexities and limited wastage 1 . Also known as additive manufacturing (AM), this ingenious technology has found its applications in various fields such as automobiles, aerospace, rapid tooling, defense, jewelry, food, apparels, pharmacy, and so forth 2–4 . Over the last decade, AM has proved to be a juggernaut in Industry 4.0 concept owing to its futuristic aspects like the use of smart materials, automation, remote access, and reverse engineering 5 …”

Section: Introductionmentioning

confidence: 99%

“…1 Also known as additive manufacturing (AM), this ingenious technology has found its applications in various fields such as automobiles, aerospace, rapid tooling, defense, jewelry, food, apparels, pharmacy, and so forth. [2][3][4] Over the last decade, AM has proved to be a juggernaut in Industry 4.0 concept owing to its futuristic aspects like the use of smart materials, automation, remote access, and reverse engineering. 5 The significance of additive manufacturing has been rising over the years in the field of bioscience and pharmacy.…”

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confidence: 99%

Investigations of hybrid infill pattern in additive manufactured tablets: A novel approach towards tunable drug release

Reddy

Sharma

2023

J Biomed Mater Res

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The significance of 3D printing has risen exponentially in biomedical and pharmaceutical applications. Its potential in the field of fabricating drug delivery systems, by virtue of processing biocompatible polymers, has been very lucrative. This work aims to tap the interstitial drug delivery kinetics that are often inaccessible through machine‐specific infill patterns in additive manufactured tablets fabricated using PVA biopolymer as an excipient. In this regard, a myo‐inositol containing tablet has been printed using Fused Deposition Modeling preceded by Hot Melt Extrusion drug loading route. Two machine‐specific infill patterns were taken, namely straight and grid. Later, these two distinct patterns were juxtaposed to obtain novel hybrid infill patterns in the tablets. Then, these tablets and their filament were subjected to various thermal, mechanical, imaging and pharmaceutical characterization tests to assess the feasibility of the research attempt. Finally, dissolution tests were conducted to evaluate their dissolution behavior over a time period. The characterization tests proved the scientific viability of this attempt along with amorphous existence of drug in the polymeric filament. The dissolution results showed favorable drug release by achieving interstitial dissolution timings with surface area/volume (SA/V) ratio being found to be the principal factor.

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Drilling Strategies for Additively Manufactured and Casted SS316L Stainless Steel

Singh,

Durga Prasad Reddy

et al. 2023

J. of Materi Eng and Perform

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Investigation on performance of a copper coated hollow rapid electrode during electrical discharge machining

Cited by 8 publications

References 37 publications

Mapping the structural properties of zinc scaffold fabricated via rapid tooling for bone tissue engineering applications

Mapping the structural properties of zinc scaffold fabricated via rapid tooling for bone tissue engineering applications

Investigations of hybrid infill pattern in additive manufactured tablets: A novel approach towards tunable drug release

Drilling Strategies for Additively Manufactured and Casted SS316L Stainless Steel

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