Laser polishing of additive manufactured CoCr alloy components with complex surface geometry

Yung, Kam Chuen; Xiao, T.Y.; Choy, H. S.; Wang, W.J.; Cai, Zhixiang

doi:10.1016/j.jmatprotec.2018.06.019

Cited by 111 publications

(46 citation statements)

References 18 publications

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“…Recent studies have focused on surface modification using lasers to satisfy strict surface requirements in medical applications. The surface quality of additive manufactured parts can be significantly improve by laser polishing [ 76 , 77 ]. Additionally, some studies show that the surface microstructure and corrosion resistance was improved by controlling the hexagonal close packed structures and the formed oxides [ 78 ].…”

Section: Post-processing Strategiesmentioning

confidence: 99%

Challenges of Co–Cr Alloy Additive Manufacturing Methods in Dentistry—The Current State of Knowledge (Systematic Review)

et al. 2020

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Complex dental components which are individually tailored to the patient can be obtained due to new additive manufacturing technology. This paper reviews the metallic powders used in dental applications, the fabrication process (build orientation, process parameters) and post-processing processes (stress relieving, surface finishing). A review of the literature was performed using PubMed, ScienceDirect, Mendeley and Google Scholar. Over eighty articles were selected based on relevance to this review. This paper attempts to include the latest research from 2010 until 2020, however, older manuscripts (10 articles) were also selected. Over 1200 records were identified through the search; these were screened for title and/or summary. Over eighty articles were selected based on relevance to this review. In order to obtain a product which can be used in clinical applications, the appropriate manufacturing parameters should be selected. A discussion was made on optimal selective laser melting (SLM) parameters in dentistry. In addition, this paper includes a critical review of applied thermal treatment methods for Co–Cr alloys used in dentistry.

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Section: Post-processing Strategiesmentioning

confidence: 99%

Challenges of Co–Cr Alloy Additive Manufacturing Methods in Dentistry—The Current State of Knowledge (Systematic Review)

et al. 2020

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“…Studies reported successful applying laser surface treatment onto curved or complex surface geometry. We planned further investigation about the influence of different sample geometries on laser polishing outcome [44,45]. It worth to note that a sample at high area-volume ratio may not be suitable to apply laser processing method to improve the surface quality, such as lattice structure.…”

Section: Surface Morphologies Of Post Treatmentmentioning

confidence: 99%

Laser polished fused deposition poly-lactic acid objects for personalized orthopaedic application

et al. 2020

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Patient-specific surgical guides are increasingly demanded. Material Extrusion (ME) is a popular 3D printing technique to fabricate personalized surgical guides. However, the ME process usually generates deleterious surface topography which is not suitable for orthopaedic emergencies. We designed and optimized parametric combinations of a laser polishing approach as post process to improve the surface quality of ME-made poly-lactic acid (PLA) objects. In this study, we investigated the contribution of processing variables to the mechanical properties and the biocompatibilities in vitro of the ME-made PLA objects. Conventional surface grinding was conducted as comparison. The results demonstrate that the ME-made PLA samples exhibit good mechanical properties and favourable biocompatibility after being post processed using laser polishing. The post laser polishing, as a powerful tool in manufacture of ME-made PLA objects, will open a new approach with a great promise in its applications in personalized and timely management of medical emergencies.

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“…Ma et al hold that the method was mainly based on the melting caused by the thermal input of laser irradiation [24], accompanied by the solid-liquid-gas phase change. Yung et al presented a novel method for reducing the surface roughness of cobalt chromium (CoCr) components with a complex surface geometry by applying a polishing method [25]. They achieved a reduction in the surface roughness of up to 93% relative to the as-received samples.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Laser Polishing of Four Selective Laser Melting Alloy Samples

Zhang

et al. 2020

Applied Sciences

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Selective laser melting (SLM) is a layer by layer process of melting and solidifying of metal powders. The surface quality of the previous layer directly affects the uniformity of the next layer. If the surface roughness value of the previous layer is large, there is the possibility of not being able to complete the layering process such that the entire process has to be abandoned. At least, it may result in long term durability problem and the inhomogeneity, may even make the processed structure not be able to be predicted. In the present study, the ability of a fiber laser to in-situ polish the rough surfaces of four typical additive-manufactured alloys, namely, Ti6Al4V, AlSi10Mg, 316L and IN718 was demonstrated. The results revealed that the surface roughness of the as-received alloys could be reduced to about 3 μm through the application of the laser-polishing process, and the initial surfaces had roughness values of 8.80–16.64 μm. Meanwhile, for a given energy density, a higher laser power produced a laser-polishing effect that was often more obvious, with the surface roughness decreasing with an increase in the laser power. Further, the polishing strategy will be optimized by simulation in our following study.

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Laser polishing of additive manufactured CoCr alloy components with complex surface geometry

Cited by 111 publications

References 18 publications

Challenges of Co–Cr Alloy Additive Manufacturing Methods in Dentistry—The Current State of Knowledge (Systematic Review)

Challenges of Co–Cr Alloy Additive Manufacturing Methods in Dentistry—The Current State of Knowledge (Systematic Review)

Laser polished fused deposition poly-lactic acid objects for personalized orthopaedic application

Investigation of Laser Polishing of Four Selective Laser Melting Alloy Samples

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