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The equiatomic titanium-nickel alloy, known as nitinolNitinol, is a highly sought-after titanium-based alloy used in biomedical applications, particularly in orthopedic implants. Its outstanding properties, such as low density, shape memory effect, high wear and corrosion resistance, good biocompatibility, and low Young's modulus compared to stainless steelSteel or cobalt alloys, make it a truly impressive material. The present paper discusses the most significant findings on the tribological behavior of nitinolNitinol for biomedical applications. The crystallite size was estimated by X-ray diffraction (XRDX-ray Diffraction (XRD)), and the hardness was determined by nanoindentation. The study found that as the milling time increased, the size of the crystallite decreased while the hardness increased. The results of the tribological tests indicated that the enhanced mechanical propertiesMechanical properties, particularly the increased hardness and grain refinement of the alloys, contributed to the improved tribological performanceTribological performance of nitinolNitinol, specifically in terms of reduced wear rateWear rate and friction coefficientFriction coefficient. Therefore, nitinolNitinol, with its superior wear resistance, is a material that can be effectively customized for use in orthopedic implant applications.

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Investigating the Tribological Behavior of Nitinol Alloys Manufactured via Mechanical Alloying for Hip Implant Applications

  • 会议论文

  • 发表日期：

    2025年

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  • Bouchareb Nabila,
  • Hezil Naouel,
  • Fellah Mamoun,
  • Bouras Dikra,
  • Majeed Ali Habeeb,
  • Rim Imen,
  • Merah Neçar,
  • Alejandro Perez Larios,
  • A. El-Hiti Gamal,
  • Obrosov Aleksei,
  • Montagne Alex

摘要

The equiatomic titanium-nickel alloy, known as nitinolNitinol, is a highly sought-after titanium-based alloy used in biomedical applications, particularly in orthopedic implants. Its outstanding properties, such as low density, shape memory effect, high wear and corrosion resistance, good biocompatibility, and low Young's modulus compared to stainless steelSteel or cobalt alloys, make it a truly impressive material. The present paper discusses the most significant findings on the tribological behavior of nitinolNitinol for biomedical applications. The crystallite size was estimated by X-ray diffraction (XRDX-ray Diffraction (XRD)), and the hardness was determined by nanoindentation. The study found that as the milling time increased, the size of the crystallite decreased while the hardness increased. The results of the tribological tests indicated that the enhanced mechanical propertiesMechanical properties, particularly the increased hardness and grain refinement of the alloys, contributed to the improved tribological performanceTribological performance of nitinolNitinol, specifically in terms of reduced wear rateWear rate and friction coefficientFriction coefficient. Therefore, nitinolNitinol, with its superior wear resistance, is a material that can be effectively customized for use in orthopedic implant applications.