Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step Technique
Metal Binder Jetting (BJT/M) has emerged as a promising additive manufacturing (AM) technology for the realization of complex parts using a wide range of metal alloys. This technology offers several advantages, such as design flexibility, reduced lead times, a high building rate, and the ability to...
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MDPI AG
2024-12-01
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| Series: | Journal of Manufacturing and Materials Processing |
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| author | Alessandro Pellegrini Fulvio Lavecchia Maria Grazia Guerra Luigi Maria Galantucci |
| author_facet | Alessandro Pellegrini Fulvio Lavecchia Maria Grazia Guerra Luigi Maria Galantucci |
| author_sort | Alessandro Pellegrini |
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| description | Metal Binder Jetting (BJT/M) has emerged as a promising additive manufacturing (AM) technology for the realization of complex parts using a wide range of metal alloys. This technology offers several advantages, such as design flexibility, reduced lead times, a high building rate, and the ability to fabricate intricate geometries that are difficult or impossible to achieve with conventional manufacturing methods. Cobalt Chromium Molybdenum (CoCrMo) alloys are particularly suitable for demanding applications in the aerospace, biomedical, and industrial sectors that require high strength and hardness, corrosion resistance, and biocompatibility. In this work, ten cubic and ten tensile samples were printed with a layer height of 50 µm using the shell printing method, debound and sintered at 1325 °C for 4 h, with the aim of investigating the properties of CoCrMo parts made using BJT technology. A density of 7.88 g/cc was obtained from the Archimede’s test. According to the printing and sintering parameters, an average hardness of 18.5 ± 1.8 HRC and an ultimate tensile strength of 520.5 ± 44.6 MPa were obtained. Finally, through a microstructure analysis, an average grain size of 182 ± 14.7 µm was measured and the presence of an intergranular Cr-rich phase and Mo-rich carbides was detected. |
| format | Article |
| id | doaj-art-4aad07372fef473a93594e8f6fd0a600 |
| institution | OA Journals |
| issn | 2504-4494 |
| language | English |
| publishDate | 2024-12-01 |
| publisher | MDPI AG |
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| series | Journal of Manufacturing and Materials Processing |
| spelling | doaj-art-4aad07372fef473a93594e8f6fd0a6002025-08-20T02:00:38ZengMDPI AGJournal of Manufacturing and Materials Processing2504-44942024-12-018629210.3390/jmmp8060292Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step TechniqueAlessandro Pellegrini0Fulvio Lavecchia1Maria Grazia Guerra2Luigi Maria Galantucci3Department of Mechanics, Mathematics and Management, Politecnico di Bari, Via Orabona 4, 70125 Bari, ItalyDepartment of Mechanics, Mathematics and Management, Politecnico di Bari, Via Orabona 4, 70125 Bari, ItalyDepartment of Mechanics, Mathematics and Management, Politecnico di Bari, Via Orabona 4, 70125 Bari, ItalyDepartment of Mechanics, Mathematics and Management, Politecnico di Bari, Via Orabona 4, 70125 Bari, ItalyMetal Binder Jetting (BJT/M) has emerged as a promising additive manufacturing (AM) technology for the realization of complex parts using a wide range of metal alloys. This technology offers several advantages, such as design flexibility, reduced lead times, a high building rate, and the ability to fabricate intricate geometries that are difficult or impossible to achieve with conventional manufacturing methods. Cobalt Chromium Molybdenum (CoCrMo) alloys are particularly suitable for demanding applications in the aerospace, biomedical, and industrial sectors that require high strength and hardness, corrosion resistance, and biocompatibility. In this work, ten cubic and ten tensile samples were printed with a layer height of 50 µm using the shell printing method, debound and sintered at 1325 °C for 4 h, with the aim of investigating the properties of CoCrMo parts made using BJT technology. A density of 7.88 g/cc was obtained from the Archimede’s test. According to the printing and sintering parameters, an average hardness of 18.5 ± 1.8 HRC and an ultimate tensile strength of 520.5 ± 44.6 MPa were obtained. Finally, through a microstructure analysis, an average grain size of 182 ± 14.7 µm was measured and the presence of an intergranular Cr-rich phase and Mo-rich carbides was detected.https://www.mdpi.com/2504-4494/8/6/292additive manufacturingbinder jettingCoCrMo alloysdensitymechanical propertiesmicrostructure |
| spellingShingle | Alessandro Pellegrini Fulvio Lavecchia Maria Grazia Guerra Luigi Maria Galantucci Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step Technique Journal of Manufacturing and Materials Processing additive manufacturing binder jetting CoCrMo alloys density mechanical properties microstructure |
| title | Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step Technique |
| title_full | Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step Technique |
| title_fullStr | Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step Technique |
| title_full_unstemmed | Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step Technique |
| title_short | Analysis of Microstructure and Mechanical Properties of CoCrMo Alloys Processed by Metal Binder Jetting Multi-Step Technique |
| title_sort | analysis of microstructure and mechanical properties of cocrmo alloys processed by metal binder jetting multi step technique |
| topic | additive manufacturing binder jetting CoCrMo alloys density mechanical properties microstructure |
| url | https://www.mdpi.com/2504-4494/8/6/292 |
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