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<p>NiTi-based alloys are among the most promising materials for biomedical applications, particularly due to their physical and mechanical properties, which closely resemble those of biological bone tissues. Therefore, the development of additive manufacturing methods for NiTi-based products, which have a specific geometry tailored to the needs of patients, as well as a certain microstructure that ensures biocompatibility and specified mechanical properties, aims to achieve maximum efficiency in their application. This article presents the results that confirm the fundamental feasibility of 3D-printing NiTi-based products, whose porosity can be adjusted through the settings used in the printing process, applying the selective laser melting method (SLM). The suitability of the powder obtained after pneumatic circulation treatment and classification for SLM has been demonstrated experimentally. The porosity of the material samples fabricated by the additive method ranged from 35 to 52%. The ultimate compression strain was 2%. The ultimate compressive strength varied from 21.6 to 169&#xa0;MPa, the yield strength—from 15.7 to 154&#xa0;MPa, and the Young’s modulus—from 0.9 to 5.3 GPa, depending on the porosity. Based on the powder material used in the work, a sample of a 3D implant was fabricated according to the developed 3D-printing parameters, designed to replace a bone tissue defect in the maxillofacial region.</p>

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Effect of SLM parameters on structure and mechanical properties of porous NiTi scaffolds

  • 期刊论文

  • 发表日期：

    2025年10月14日

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  • E.S. Marchenko,
  • G.A. Baigonakova,
  • A.S. Garin,
  • D.E. Kulbakin,
  • K.A. Zheronkina,
  • D.A. Tkachev,
  • E.L. Choinzonov

摘要

NiTi-based alloys are among the most promising materials for biomedical applications, particularly due to their physical and mechanical properties, which closely resemble those of biological bone tissues. Therefore, the development of additive manufacturing methods for NiTi-based products, which have a specific geometry tailored to the needs of patients, as well as a certain microstructure that ensures biocompatibility and specified mechanical properties, aims to achieve maximum efficiency in their application. This article presents the results that confirm the fundamental feasibility of 3D-printing NiTi-based products, whose porosity can be adjusted through the settings used in the printing process, applying the selective laser melting method (SLM). The suitability of the powder obtained after pneumatic circulation treatment and classification for SLM has been demonstrated experimentally. The porosity of the material samples fabricated by the additive method ranged from 35 to 52%. The ultimate compression strain was 2%. The ultimate compressive strength varied from 21.6 to 169 MPa, the yield strength—from 15.7 to 154 MPa, and the Young’s modulus—from 0.9 to 5.3 GPa, depending on the porosity. Based on the powder material used in the work, a sample of a 3D implant was fabricated according to the developed 3D-printing parameters, designed to replace a bone tissue defect in the maxillofacial region.