Additive manufacturing of a shift block via laser powder bed fusion: the simultaneous utilisation of optimised topology and a lattice structure

Kim, Sang Hoon; Yeon, Simo; Lee, Jae Hyang; Kim, Young Won; Lee, Hyub; Park, Jiyong; Lee, Nak-Kyu; Choi, Joon Phil; Aranas, Clodualdo; Lee, Yong Jin; An, Seouk; Choi, Kyunsuk; Son, Yong

doi:10.1080/17452759.2020.1818917

Cited by 37 publications

(11 citation statements)

References 65 publications

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“…The wt.% of C and O in the orthopedic implants was determined using a carbon/sulfur analyzer (CS–800, ELTRA GmbH, Germany) and an oxygen/nitrogen analyzer (ON–900, ELTRA GmbH) with a sensitivity of 0.01 ppm and an accuracy of ±0.1 ppm for a sample of 1.0 g. [ 49 ] The amounts of TiO 2 and HA were measured and calculated from the test results using inductively coupled plasma‐optical emission spectrometry (ICP‐OES; Optima 7300DV, PerkinElmer, USA). [ 50 ] The surface morphologies and chemical compositions of the filaments, plain substance, composites, and hybrid composites were examined with scanning electron microscopy (SEM; JSM–6701F, JEOL, Japan) equipped with energy‐dispersive X‐ray spectrometry (EDS) for elemental analysis. [ 51 ] The samples were prepared via a focused ion beam (AURIGA, Carl Zeiss, Germany) to investigate the distribution and thickness of the TiO 2 agglomeration and HA coating on the PEEK substance.…”

Section: Methodsmentioning

confidence: 99%

Topography‐Supported Nanoarchitectonics of Hybrid Scaffold for Systematically Modulated Bone Regeneration and Remodeling

Jang

Park

Lee

et al. 2022

Adv Funct Materials

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Orthopedic implants should have sufficient strength and promote bone tissue regeneration. However, most conventional implants are optimized for use either under high mechanical load or for active osseointegration. To achieve the dual target of mechanical durability and biocompatibility, polyether ether ketone (PEEK) filaments reinforced with internal titanium dioxide (TiO2) nanoparticles via dopamine‐induced polymerization are additively manufactured into an orthopedic implant through material extrusion (ME). The exterior of the PEEK/TiO2 composite is coated with hydroxyapatite (HA) using radiofrequency (RF) magnetron sputtering to increase both the strength and biocompatibility provided by homogeneous ceramic–ceramic interactions and the protuberant nanoscale topography between the internal TiO2 nanoparticle reinforcement and external HA coating. The hardness, tensile, and compression, and scratch test results demonstrate a considerable enhancement in the mechanical strength of the hierarchical PEEK/TiO2/HA hybrid composite structure compared to that of the conventional 3D‐printed PEEK. Furthermore, PEEK with internal TiO2 reinforcement improves the proliferation and differentiation of bone cells in vitro, whereas the external HA coating leads to a more prevalent osteoblast absorption. Micro‐computed tomography and histological analyses confirm new bone formation and a high bone‐to‐implant contact ratio on the HA‐coated PEEK structure reinforced with TiO2 nanoparticles.

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Section: Methodsmentioning

confidence: 99%

Topography‐Supported Nanoarchitectonics of Hybrid Scaffold for Systematically Modulated Bone Regeneration and Remodeling

Jang

Park

Lee

et al. 2022

Adv Funct Materials

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“…The information submitted by the World Steel Association is based on publicly available data, updated twice a year, and verified by members of the World Steel Association [ 5 , 6 ]. The presence above certain limits of non-metallic inclusions in solidified steel ingots causes essential changes in their plasticity and hot deformation capacity due to the formation of structural discontinuities [ 7 , 8 ]. The mechanical properties of structural constituents are different and, therefore, during plastic deformation processes, do not deform evenly [ 9 , 10 , 11 ].…”

Section: Introductionmentioning

confidence: 99%

“…The presence beyond certain limits of non-metallic inclusions in solidified steel ingots causes essential changes in their plasticity and thermic deformation capacity due to the formation of structural discontinuities [ 7 , 8 , 9 , 10 , 11 ]. Powdery and small ferrous waste resulting in different phases of industrial processes (in most cases steel) represents an intrinsic value, which is determined by the ferrous content (chemically bound iron, sometimes metallic) that can properly replace the raw material, namely iron ore/cast iron/scrap iron, in steel processes [ 6 , 7 , 8 ].…”

Section: Introductionmentioning

confidence: 99%

Experimental Research for the Establishment of the Optimal Forging and Heat Treatment Technical Parameters for Special Purpose Forged Semi-Finishes

et al. 2023

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The authors present in this paper the experimental results and conclusions obtained after conducting a comparative study on three samples of forged semi-finished products from the steel brands 10CrMo9-10, 25CrMo4, and 42CrMo4. These are common heat-resistant alloy steels used in various industries nationally and internationally. This study aimed to test under the same identical experimental conditions of forging and heat treatment of three samples made of three different brands of steels 10CrMo9-10, 25CrMo4, and 42CrMo4. Analyzing the experimental results obtained, it can be seen for which of the three brands of tested steels the best forging and heat treatment parameters are obtained. Following experimental research, the best material was determined by analyzing the results obtained for the mechanical characteristics (tensile tests according to DNVGL-RP0034-SFC2 and NACE MR0175–hardness 207-235 HBW) and austenitic grain size. The authors determined that among the three types of steels analyzed, 10CrMo9-10 best meets the imposed requirements. This statement is in view of the comparative analysis of the results of experimental research.

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“…This method is quite universal and can be used to form both external [45,46] and internal flanges [47,48], as well as to flange the edges of holes made in metal sheets [49]. In addition to metal forming, incremental manufacturing is increasingly used in additive manufacturing, based on laser forming [50].…”

Section: Introductionmentioning

confidence: 99%

Theoretical and Experimental Study on the Effect of Selected Parameters in a New Method of Extrusion with a Movable Sleeve

Winiarski

2022

Materials

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This paper presents a new method for forming hollow flanged products. The method involves extrusion with the use of a sleeve moving in the opposite direction to that of the punch. A tube with a constant hole diameter and two different outside diameters, made of aluminum alloy EN AW 6060 was used as a material. Numerical calculations were performed using Deform 2D/3D. Experiments were conducted on the PYE 160SS hydraulic press equipped with a specially designed device in which the punch is driven by the press slide while the moveable sleeve is driven by two hydraulic servomotors. Both numerical simulations and experiments were conducted under cold forming conditions. The aim of this study was to determine the effect of selected parameters (flange diameter, height of the cavity in the moveable sleeve, and the chamfer angle between the regions with different outside diameters on the workpiece and in the moveable sleeve cavity) on the stability of the extrusion process. Results were then used to undertake detailed comparative analyses of underfill, flange heights, and flange flank inclination angles. Findings of the analyses served as a basis for drawing conclusions regarding the effect of the analyzed parameters on the investigated extrusion process.

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Additive manufacturing of a shift block via laser powder bed fusion: the simultaneous utilisation of optimised topology and a lattice structure

Cited by 37 publications

References 65 publications

Topography‐Supported Nanoarchitectonics of Hybrid Scaffold for Systematically Modulated Bone Regeneration and Remodeling

Topography‐Supported Nanoarchitectonics of Hybrid Scaffold for Systematically Modulated Bone Regeneration and Remodeling

Experimental Research for the Establishment of the Optimal Forging and Heat Treatment Technical Parameters for Special Purpose Forged Semi-Finishes

Theoretical and Experimental Study on the Effect of Selected Parameters in a New Method of Extrusion with a Movable Sleeve

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