Reducing the roughness of internal surface of an additive manufacturing produced 316 steel component by chempolishing and electropolishing

Tyagi, Pawan; Goulet, Tobias; Riso, Christopher; Stephenson, R. M.; Chuenprateep, Nitt; Schlitzer, Justin; Benton, Cordell; García‐Moreno, Francisco

doi:10.1016/j.addma.2018.11.001

Cited by 102 publications

(75 citation statements)

References 15 publications

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“…Also, when removed, supports commonly leave relatively rough areas on the component surfaces. Excess surface roughness and remaining support structures can be treated using different chemical and electrochemical methods [44,45]. But most complicated is removal of the support structures placed in the inner channels inside the components, but industrial methods for removal of the support structures in "hard to get" spaces are start to emerge [46].…”

Section: Powder-bed Additive Manufacturingmentioning

confidence: 99%

Powder-bed additive manufacturing for aerospace application: Techniques, metallic and metal/ceramic composite materials and trends

et al. 2019

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The current paper is devoted to classification of powder-bed additive manufacturing (PB-AM) techniques and description of specific features, advantages and limitation of different PB-AM techniques in aerospace applications. The common principle of “powder-bed” means that the used feedstock material is a powder, which forms “bed-like” platform of homogeneous layer that is fused according to cross-section of the manufactured object. After that, a new powder layer is distributed with the same thickness and the “printing” process continues. This approach is used in selective laser sintering/melting process, electron beam melting, and binder jetting printing. Additionally, relevant issues related to powder raw materials (metals, ceramics, multi-material composites, etc.) and their impact on the properties of as-manufactured components are discussed. Special attention is paid to discussion on additive manufacturing (AM) of aerospace critical parts made of Titanium alloys, Nickel-based superalloys, metal matrix composites (MMCs), ceramic matrix composites (CMCs) and high entropy alloys. Additional discussion is related to the quality control of the PB-AM materials, and to the prospects of new approaches in material development for PB-AM aiming at aerospace applications.

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Section: Powder-bed Additive Manufacturingmentioning

confidence: 99%

Powder-bed additive manufacturing for aerospace application: Techniques, metallic and metal/ceramic composite materials and trends

et al. 2019

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“…Many ongoing research works concentrate on the optimization of the AM process or the surface finishing techniques of the as-built components to improve its surface quality [ 10 , 11 , 12 , 13 ]. For instance, Tyagi et al, demonstrated an improvement of the surface quality by optimizing the manufacturing processes and processing parameters, which are often limited by physical or material properties [ 13 ]. To subsequently improve the surface quality of AM components, post-treatment processes are also frequently necessary.…”

Section: Introductionmentioning

confidence: 99%

Simultaneous Micro-Structuring and Surface Smoothing of Additive Manufactured Parts Using DLIP Technique and Its Influence on the Wetting Behaviour

et al. 2021

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It is well known that the surface topography of a part can affect its function as well as its mechanical performance. In this context, we report on the surface modification of additive manufactured components made of Titanium 64 and Scalmalloy®, using Direct Laser Interference Patterning technique. In our experiments, a nanosecond-pulsed near-infrared laser source with a pulse duration of 10 ns was used. By varying the process parameters, periodic structures with different depths and associated roughness values are produced. Additionally, the influence of the resultant morphological characteristics on the wettability behaviour of the fabricated textures is investigated by means of contact angle measurements. The results demonstrated a reduction of the surface roughness of the additive manufactured parts (in the order of some tens of micrometres) and simultaneously the production of well-defined micro-patterns (in the micrometre range), which allow the wettability of the surfaces from 26° and 16° up to 93° and 131° to be tuned for Titanium 6Al 4V and Al-Mg-Sc (Scalmalloy®), respectively.

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“…1,5 Throughout the literature, the most focused metallic materials in the electropolishing are stainless steels in aqueous and ionic liquids media. [6][7][8][9] It is also a few work on titanium, nickel and cobalt surface finishing were documented using ionic liquids. 3,10 Abbott et al is one of the pioneers that has own perspective regarding usage of deep eutectic solvents.…”

Section: Introductionmentioning

confidence: 99%

Novel Electropolishing of Pure Metallic Titanium in Choline Chloride-Based Various Organic Solvents

et al. 2021

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In this report we present a straightforward and efficient electropolishing methodology of pure metallic titanium in two different electrolytic baths; choline chloride-ethanol (ChCl-eth.) and choline chloride-methanol-butanol (ChCl-meth.-but.) in molar ratios of 1 : 4 and 1 : 6 : 2, respectively at 20°C. The electrolytic baths under study possess relatively low-cost and environmentally benign. In the electropolishing processes, potentiostatic technique was applied. For the surface characterizations both atomic force microscope (AFM) and scanning electron microscopy (SEM) were used. The results showed that titanium surface was polished electrochemically at nanoscale and relatively free from defects. The working voltages of 2 and 1.2 V were applied in ChCl-eth. and ChCl-meth.-but., respectively within a time scale of 40 minutes in the present electrolytic baths. The roughness of pure metallic titanium (ca. 120.5 nm) was reduced to 0.10 nm in ChCl-eth. and 0.66 nm in ChCl-meth.-but.

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Reducing the roughness of internal surface of an additive manufacturing produced 316 steel component by chempolishing and electropolishing

Cited by 102 publications

References 15 publications

Powder-bed additive manufacturing for aerospace application: Techniques, metallic and metal/ceramic composite materials and trends

Powder-bed additive manufacturing for aerospace application: Techniques, metallic and metal/ceramic composite materials and trends

Simultaneous Micro-Structuring and Surface Smoothing of Additive Manufactured Parts Using DLIP Technique and Its Influence on the Wetting Behaviour

Novel Electropolishing of Pure Metallic Titanium in Choline Chloride-Based Various Organic Solvents

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