Biomedical Co-Cr-Mo Components Produced by Direct Metal Laser Sintering1

Girardin, E.; Barucca, G.; Mengucci, P.; Fiori, F.; Bassoli, Elena; Gatto, Andrea; Iuliano, Luca; Rutkowski, Bogdan

doi:10.1016/j.matpr.2016.02.022

Cited by 37 publications

(27 citation statements)

References 20 publications

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“…Limmahakhun et al [2] noted that CoCr alloys apart from their high biocompatibility have greater strength and better wear resistance than Ti alloys, thus they are used in hip replacements. In general, the use of these materials for surgical implants took place over 60 years ago, which is emphasized by Gorardin et al [3]. On the other side, Pieniążek et al [4] indicated that the wide use of these alloys in biomedicine is due to the fact that they do not contain elements harmful for the human body, such as nickel or beryllium, which according to [5] allows for long-term incorporation in the human musculoskeletal system.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

et al. 2020

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The machinability of hard-to-cut CoCr alloys manufactured by Selective Laser Melting (SLM) technology is not yet sufficiently studied. Therefore, this work focuses on evaluation of surface texture formation during face turning of CoCr alloy. As part of the research, two specimen types were subject to comparison: made with the application of conventional casting and manufactured by additive manufacturing—SLM. A number of analytical and experimental methods were employed to describe the specimen composition and morphology, as: X-Ray Diffraction Analysis (XRD), optical metallurgical microscopy, confocal optical microscopy, and Vickers hardness HV0.1 measurements. In the next stage, the measurements of surface topographies formed during turning in a range of variable cutting speeds and feeds were carried out. Ultimately the multi-factor MANOVA (Multivariate Analysis of Variance) illustrating the influence of manufacturing technology, cutting speed, and feed ratio on selected surface parameters of samples was made. It has been demonstrated that during face turning with feeds up to 0.15 mm/rev, the similar values of surface roughness height and material ratio curve parameters were reached for both tested CoCr alloys. However, in a range of higher feed values, the surface quality of CoCr samples fabricated by SLM was lower than that reached for CoCr after casting process.

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Section: Introductionmentioning

confidence: 99%

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

et al. 2020

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“…No entanto, as estratégias de escaneamento também fazem referência ao gradiente de temperatura no processo de consolidação, como: sentido e orientação de escaneamento do feixe laser, ângulo de rotação entre as camadas e ao número de passe do feixe laser (repasse) por camada (LIVERANI et al, 2016;FAIDEL et al, 2015;LU et al, 2015;QIAN et al, 2015). GIRARDIN et al, 2016;KAJIMA et al, 2016;VRANCKEN et al, 2014).…”

Section: Técnica De Fundição De Precisãounclassified

“…Amostras obtidas pelo processo SLM (vide Figura 21b) apresentam uma microestrutura com formato característico da fusão a laser, e sua configuração depende do tipo de estratégia de escaneamento utilizada no processo. Esta configuração típica do processo SLM é descrita por diversos autores (BARUCCA et al, 2015;GIRARDIN et al, 2016;RIVERA et al, 2011;STAWARCZYK et al, 2014;TAKAICHI et al, 2013;XIN et al, 2012).…”

Section: Fusão Seletiva a Laser E Fundição De Precisão Em Ligas De Co-crunclassified

“…Este estudo faz uma análise similar aos estudos de Facchini (2010) GIRARDIN et al, 2016;KAJIMA et al, 2016;HEDBERG et al, 2014;JABBARI et al, 2014) indicando a presença de duas fases referentes aos picos de maior intensidade, representando as fases de γ -Co,Cr (CFC) e ε -Co3Mo (HC).…”

Section: Análise Da Dureza Vickersunclassified

“…Como analisado na microscopia óptica, a incidência do feixe laser resulta na estrutura de geometria elipsoide (destacado pelas setas nas imagens). Esta configuração típica do feixe laser é descrita por diversos autores (BARUCCA et al, 2015;GIRARDIN et al, 2016;STAWARCZYK et al, 2014;TAKAICHI et al, 2013). Em aumentos superiores observa-se que a microestrutura do SLM é homogênea e não há presença de fases segregadas, como observado nas amostras FP.…”

Section: Caracterização Das Amostras Slm Por Mevunclassified

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Avaliação de propriedades mecânicas e caracterização microestrutural de consolidados de Cobalto-Cromo-Molibdênio obtidos por fusão seletiva a laser e fundição de precisão

Mergulhão¹

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The objective of this work was to study the mechanical properties and microstructural characterization of specimens of the Co-Cr-Mo alloy obtained by additive manufacturingselective laser melting (SLM) and precision casting aiming at the manufacture of dental prostheses. The following steps were carried out on Co-Cr-Mo gas-atomized powders: 1) investigation of the physical, chemical and thermal properties of atomized powders in different grain sizes (denominated: D1 <15 μm, D2 20-50 μm and D3 > 75 μm); 2) the consolidation of standard specimens via consolidation techniques; 3) characterization of consolidated by analysis of: cytotoxicity, porosity, X ray diffraction and dilatometry; 4) mechanical characterization of tensile, 3 point bending, hardness (macro and micro Vickers) tests and microstructural characterization (optical and scanning electron microscopy). In general, the results observed were: the grain size D2 (20-50 μm) is the one that best fits in the analysis of packaging, for the consolidation by SLM; the biocompatibility of the samples obtained a positive result for both processing techniques; the mechanical evaluation of the specimens shows that the SLM technique provides superior mechanical properties (yield stress, rupture stress, maximum stress, elongation and hardness), compared to those obtained by the precision casting technique; the microstructure obtained by the SLM process results in an ultrafine grains with high chemical homogeneity, differentiated by the gross dendritic microstructure in the casting process. In this way, the development of the present study evidenced superior quality in manufacturing customized dental components (copings) by SLM technique compared to precision casting.

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Application of Fuzzy Integrated JAYA Algorithm for the Optimization of Surface Roughness of DMLS Made Specimen: Comparison with GA

Gajera

Darji

Dave

2019

Advanced Engineering Optimization Through Intelligent Techniques

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Biomedical Co-Cr-Mo Components Produced by Direct Metal Laser Sintering1

Cited by 37 publications

References 20 publications

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

Evaluation of Surface Topography after Face Turning of CoCr Alloys Fabricated by Casting and Selective Laser Melting

Avaliação de propriedades mecânicas e caracterização microestrutural de consolidados de Cobalto-Cromo-Molibdênio obtidos por fusão seletiva a laser e fundição de precisão

Application of Fuzzy Integrated JAYA Algorithm for the Optimization of Surface Roughness of DMLS Made Specimen: Comparison with GA

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