EDM performance of Cr/Cu-based composite electrodes

Tsai, Hsien Chung; Yan, Biing Hwa; Huang, Fuang Yuan

doi:10.1016/s0890-6955(02)00238-9

Cited by 246 publications

(118 citation statements)

References 14 publications

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“…The EDM surface corrosion resistance has encountered little interest [19][20][21][22][23] despite of its importance for many applications of metallic components manufactured by this process and used in more or less aggressive environments typically in aerospace, nuclear power plant and biomedical dental implant industries [1][2][3][24][25][26][27][28]. Furthermore, the available data on the corrosion resistance of finished surface by EDM is incomplete and sometimes controversial to provide any meaningful conclusion.…”

Section: Introductionmentioning

confidence: 99%

“…Authors explain this result by the absence of the white layer and low surface roughness obtained by an electron beam at optimised operating conditions. Based on this result, Tsai et al [22] developed a sintered electrode tools made in Cu-Cr 80-20 % composite to improve the uniform corrosion resistance of the AISI 1045 EDM surfaces. The authors show an improvement of steel corrosion resistance by reducing the thickness of the white layer and the crack density and by favouring the migration of chromium from the electrode tool to the surface of the work piece.…”

Section: Introductionmentioning

confidence: 99%

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Effect of electro discharge machining (EDM) on the AISI316L SS white layer microstructure and corrosion resistance

Sidhom

Ghanem

Amadou

et al. 2012

Int J Adv Manuf Technol

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. Abstract The localised corrosion resistance of austenitic stainless steels is strongly influenced by the quality of finished surface. EDM machining induces substantial changes by the high thermal gradients generated by electric sparks. Experimental techniques such as roughness measurement, scanning electron microscopy (SEM), energy dispersive microanalysis (EDX) and X-ray diffraction technique, reveal microgeometrical, microstructural, chemical and mechanical changes. These changes lead to white and heat-affected layers with a depth less than 100 μm. The white layer is a melted material characterised by dendritic structure and constituted by austenite, chromium carbide and ε-carbide. The heat-affected layer is characterised by very large grain size comparatively to the bulk material. Electrochemical test coupled with metallographic examinations using SEM reveals a weakening of the resistance to pitting and intergranular corrosion comparatively to diamond polished surface. This weakening is correlated to differences in structure and chemical composition of white layer. Susceptibility to stress corrosion cracking has been attributed to the field of tensile residual stresses resulting from thermal effects. The removal of the white layer material by polishing or wire brushing restores the corrosion resistance of the AISI316L SS.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of electro discharge machining (EDM) on the AISI316L SS white layer microstructure and corrosion resistance

Sidhom

Ghanem

Amadou

et al. 2012

Int J Adv Manuf Technol

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show abstract

“…The role of sintering pressure of the Cu/Cr composites tool electrodes in EDM were analyzed by Tasai et al [47]. They claimed that high sintering pressure responsible for the higher material removal while lower pressure leads to easily drop-out of the Cu and Cr particles from the electrode material due to their weak bonding strength.…”

Section: A Research In Composites Tool Materialsmentioning

confidence: 99%

Recent Research Trends in Tool Electrode of Electrical Discharge Machining: A Review

2016

Arimpie - 2016

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-Electrical Discharge Machining (EDM) is a thermo-electrical based non-contact material removal process for machining of the electrically conductive difficult-to-machine materials. The machinability of the EDM process is not affected by mechanical and physical properties of the workpiece materials. Even though, its performances are highly affected by the tool materials and their designs. Most of the research papers refer to enhance the productivity of the EDM process without considering the effect of the parameters related to the tool electrodes. Generally, the tool wear is the well known phenomenon of the EDM process that affects the plasma formation as well as surface quality and productivity. The aim of the present study is to summarize a report on the published works related to the tool electrodes materials, designs and their effect on the performances of the EDM process. Instead of this, the present paper also focuses to future research scope in the same field and discussed in the brief.

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“…Usually, in most applications, standard electrodes made of graphite, copper or other metals are considered [3,5]. It is because of their high melting temperature and good thermal and electrical conductivity [3,20]. Sometimes some changes to the standard process are proposed, like sequential machining using different manufacturing techniques or hybrid processes joining at least two manufacturing techniques simultaneously [4,14,21].…”

Section: Introductionmentioning

confidence: 99%

Multifilament carbon fibre tool electrodes in micro EDM—evaluation of process performance based on influence of input parameters

Trych-Wildner

Wildner

2017

Int J Adv Manuf Technol

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The aim of the study was to verify the possibility of application of multifilament carbon fibre electrodes for electrical discharge machining process. In the article, the novel type of tool electrode in form of a rod that is composed of carbon fibres was proposed. The performed analysis taking into account the influence of input parameter from RC generator like voltage, capacitance and resistance along with evaluation of the process with this novel type of electrodes was considered. The manufacturing technique was assessed by analysing the geometry parameters of machined holes like diameters and maximum depth. The detailed analysis and quantitative values of the impact of each of the input factors were presented and response surfaces according to the experimental methodology were obtained. The key efficiency parameter which was expressed by material removal rate (MRR) was also calculated and compared with data for other materials used as tool electrodes that were presented previously in literature. The comparison study proved that with multifilament carbon fibre electrodes the comparable range of MRR parameter in similar electro-erosive conditions can be obtained. Thus, they can be considered as complementary material for tool electrode purposes.

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EDM performance of Cr/Cu-based composite electrodes

Cited by 246 publications

References 14 publications

Effect of electro discharge machining (EDM) on the AISI316L SS white layer microstructure and corrosion resistance

Effect of electro discharge machining (EDM) on the AISI316L SS white layer microstructure and corrosion resistance

Recent Research Trends in Tool Electrode of Electrical Discharge Machining: A Review

Multifilament carbon fibre tool electrodes in micro EDM—evaluation of process performance based on influence of input parameters

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