2019
DOI: 10.3390/jmmp3040086
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Electropolishing of Laser Powder Bed-Fused IN625 Components in an Ionic Electrolyte

Abstract: This work presents the first practical application of ionic electrolytes for electropolishing of nickel-based superalloys. It contains the results of an experiment-driven optimization of the applied potential and electrolyte temperature during electropolishing of laser powder bed-fused IN625 components containing surfaces oriented to the building platform under angles varying from 0 to 135°. For comparative purposes, the roughness profilometry and confocal microscopy techniques were used to characterize the su… Show more

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Cited by 10 publications
(11 citation statements)
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References 26 publications
(68 reference statements)
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“…The thickness loss due to the electrochemically polishing is as high as around 80 μm [ 125 , 126 ]. As a result, polished parts are considered to have weak dimensional integrity, which is a significant disadvantage.…”
Section: Internal Surface Finishingmentioning
confidence: 99%
“…The thickness loss due to the electrochemically polishing is as high as around 80 μm [ 125 , 126 ]. As a result, polished parts are considered to have weak dimensional integrity, which is a significant disadvantage.…”
Section: Internal Surface Finishingmentioning
confidence: 99%
“…22 The presence of a passive film on the anode surface can also increase the ohmic drop and decrease the current efficiency of an electropolishing system. 118 High voltages are well known for accelerating metal dissolution. However, while low voltages might not activate the polishing electrode reactions, applications of very high potentials are generally avoided.…”
Section: Electropolishing Of Am Parts: Potentials and Challengesmentioning
confidence: 99%
“…22,23 Similar trends were observed in the electropolishing of titanium and Inconel 625 AM parts where electropolishing at elevated temperatures resulted in non-uniform metal dissolution and loss of geometry of the workpiece. 118,124,125 Electropolishing bath agitation. Another important aspect to be considered in the design of the electropolishing setup is electrolyte agitation because a uniform electrolyte flow can yield a uniform surface finish.…”
Section: Electropolishing Of Am Parts: Potentials and Challengesmentioning
confidence: 99%
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“…The data on electropolishing of nickel were obtained in a mixture of choline chloride with ethylene glycol (1:2) [56][57][58][59][60][61][62][63]. The nickel finishing was conducted at the optimum voltage of 3.75 V for 900 s at 70 • C. The average roughness of nickel was found to decrease from 138.408 to 28.640 nm to form a smoothed surface of the sample in ethaline [56].…”
Section: Nickelmentioning
confidence: 99%