INFLUENCE OF SLM PARAMETERS ON COCR ALLOY

Cosmin COSMA, Raul ILIE, Mircea Cristian DUDESCU, Ioan Alexandru POPAN, Petru BERCE, Stanisław LEGUTKO, Nicolae BALC

Abstract


Among the most advanced technologies recently developed, selective laser melting (SLM) is one of the most innovative. The present SLM work aimed to determine the effect of laser power on hard metals such as cobalt chrome (CoCr) alloy. The following physical-mechanical proprieties were determined: ultimate tensile strength, Young modulus, surface hardness, and porosity level. Using industrial computer tomography (CT), the micro-porosity of SLM specimens was analyzed. It was observed that the laser power affects both the mechanical properties and microstructure of CoCr parts. Decreasing the porosity level will increase the mechanical resistance. The lowest porosity level was recorded on samples manufactured with 120 W. On the other hand, lower laser power (70 W) can improve the elasticity of SLM parts down to 19 GPa. The highest ultimate tensile strength was obtained at 120 W, maintaining constant the other SLM parameters. The highest surface hardness was 239 HB. Depending on implant requires, the SLM process can customize even the physical-mechanical properties of CoCr alloy. Future SLM research is needed to evaluate the fatigue limit of CoCr implants using the present technological parameters. From our point of view, the SLM technology will change the medical manufacturing industry, making it much flexible and customized.

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Lietaert, K., Cutolo, A., et al., Fatigue life of additively manufactured Ti6Al4V scaffolds under tension-tension, tension-compression and compression-compression fatigue load, Nature Sci. Rep., vol. 8, 4957, 2018.

Mukherjee, T., Zuback, JS., De, A., DebRoy, T., Printability of alloys for additive manufacturing. Nature Sci. Rep., vol. 6, 19717, 2016.

Demir AG, Previtali B. Additive manufacturing of cardiovascular CoCr stents by selective laser melting. Mater Des 2017;119:338-50.

Hitzler L, Alifui-Segbaya F, Williams P, Heine B, Heitzmann M, Hall W, et al. Additive manufacturing of cobalt-based dental alloys: analysis of microstructure and physicomechanical properties. Adv Mater Sci Eng 2018;2018: 8213023.

Buican, G.R.; Oancea, G.; Martins, R.F. Study on SLM manufacturing of teeth used for dental tools testing. MATEC Web Conf. 2017, 94, 03002, 2017.

Grobelny, P.; Furmanski, L.; Legutko, S. Investigations of Surface Topography of Hot Working Tool Steel Manufactured with the Use of 3D Print. MATEC Web Conf. 2017, 137, 02004.

Miron-Borzan, C.S.; Sabau, E.; Vilau, C.; Ceclan, V. A comparative study using finite element analyses for cervical disc implants. Acad. J. Manuf. Eng. 2020, 18, 5–11.

Popan, I.A.; Balc, N.; Popan, A.; Fratila, D.; Trif, A. Surface roughness prediction during dry turning of austenitic stainless steel AISI 304. Appl. Mech. Mater. 2015, 808, 54–59.

N Panc, G Contiu, V Bocanet, L Thurn, E Sabau, The influence of cutting technology on surface wear hardness, Academic Journal of Manufacturing Engineering, vol. 17 (3), 205-210, 2019.

A Popescu, G Enciu, T Dobrescu, NE Pascu, Experimental research using the 3D printing technology with plastic materials for prehension systems JAWS, Mat. Plast 55, 20-23, 2018.

Armencea, G.; Berce, C.; Rotaru, H.; Bran, S.; Stefan, V.; Leordean, D.; Jula, C.-A.; Gheban, D.; Lazar, M.; Baciut, G.; et al. Titanium alloys with hydroxyapatite or SiO2+TiO2 coatings used in bone reconstruction. J. Optoelectron. Adv. Mat. 2015, 9, 865–868.

A Burde, S Baciu, M Hedesiu, Usefulness of 3d printed anatomical models in craniomaxillofacial surgery. A literature review. International Journal of Medical Dentistry, vol. 25 (4), 2021.

Curaj, A.; Paunica, M.; Popa, A.; Holeab, C.; Jora, O.D. Sustainability Through Directed Change in the Visionary University: From Predicting to Producing the Future. Amfiteatru Econ. 2020, 22, 905–919.

Monkova, K.; Vasina, M.; Monka, P.P.; Vanca, J.; Kozak, D. Effect of 3D-Printed PLA Structure on Sound Reflection Properties. Polymers 2022, 14, 413.

Cosma C, Kessler J, Gebhardt A, Campbell I, Balc N. Improving the Mechanical Strength of Dental Applications and Lattice Structures SLM Processed. Materials (Basel). 2020 Feb 18;13(4):905.

A. du Plessis, P. Sperling, et al. Standard method for microCT-based additive manufacturing quality control 1: Porosity analysis, MethodsX, Volume 5, 2018, pages 1102-1110.

De Chiffre, L.; Carmignato, S.; Kruth, J.P.; Schmitt, R.; Weckenmann, A. Industrial applications of computed tomography. CIRP Ann. 2014, 63, 655–677.

C. Cosma, M. Moldovan, M. Simion, N. Balc, Impact of laser parameters on additively manufactured cobalt-chromium restorations, Journal of Prosthetic Dentistry,Volume 128, Issue 3,2022,Pages 421-429.

Cosma, C.; Teusan, C.; Gogola, P.; Simion, M.; Gabalcova, Z.; Trif, A.; Berce, P.; Balc, N. Investigation of the Interface between Laser-Melted CoCr and a Stainless Steel Substrate. Metals 2022, 12, 965.

Meier, H.; Haberland, C. Experimental studies on selective laser melting of metallic parts. Mater. Werkst. 2008, 39, 665–670.

C. Birleanu, M Pustan, C Cosma, V Merie, O Dranda, Tribological behaviour of sealing materials, IOP Conf. Ser.: Mater. Sci. Eng. 724 012017, 2020.

De Chiffre, L.; Carmignato, S.; Kruth, J.P.; Schmitt, R.; Weckenmann, A. Industrial applications of computed tomography. CIRP Ann. 2014, 63, 655–677.

Neamtu, C., Bere P., Methods for Checking the Symmetry of the Formula One Car Nose, Applied Mechanics and Materials, vol. 657, p.785–789, 2014.

Sobotová, L., Králiková, R., Badida M., The analysis of chosen material properties at thermal drilling, Key Engineering Materials, vol. 635, p. 35-40, 2015.

Boboia, S., Moldovan, M., Burde, A., Saroşi, C., Ardelean, I., Alb, C., The effects of the curing regime and the composition on the absorption, solubility and the amount of residual monomers of dental flowable composites, Journal of Optoelectronics and Advanced Materials, vol. 17, p. 1487 – 1493, 2015.

Vescan, S.D., Arghir, M., Contributions to the study of mechanical properties of human body, Acta Technica Napocensis Series: Applied Mathematics, Mechanics and Engineering, vol. 58 (4), 2015.

Apostu, D., Benea, H.R.C., Beldean D., Oltean-Dan D., Gabri, Z., Mester, A., Cristescu, I., The influence of component positioning on total hip replacement biomechanics, Human & Veterinary Medicine, vol. 12, p. 22-27, 2020.

Chioibasu, D., Duta, L., Popescu-Pelin, G., Popa, N., Milodin, N., et al., Animal Origin Bioactive Hydroxyapatite Thin Films Synthesized by RF-Magnetron Sputtering on 3D Printed Cranial Implants, Metals, vol. 9, 1332, 2019.


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