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Additive Manufacturing (AM), commonly known as 3D printing, has transformed the production of medical implants by offering advantages such as material optimization, design flexibility, and customization. Selective Laser Melting (SLM) stands out as the most widely used metallic AM process in the medical sector. Titanium alloy Ti6Al4V is recognized as a biomaterial due to its lightweight, corrosion resistance, fatigue resistance, and high strength. SLM has successfully produced various functional medical implants using Ti6Al4V. Achieving functional medical implants requires post-treatments to enhance their mechanical properties. Heat treatments are typically employed to alleviate residual stresses generated during the additive manufacturing process. In this study, we explored the effects of heat treatment and Hot Isostatic Pressing (HIP) treatment on a cervical fusion cage manufacturing SLM using Ti6Al4V titanium alloy. The results indicate that both heat treatment and HIP treatment significantly reduce the internal residual stresses by over 90%, in metallic medical implants produced by SLM. This reduction positively impacts the material strength of the additively manufactured metallic device.

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Effect of Post-treatment on Additively Manufactured Medical Implant: Numerical Study

  • 会议论文

  • 发表日期：

    2025年

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  • Oumayma Bougadouha,
  • Mounir Frija,
  • Raouf Fathallah,
  • Malika Khodja

摘要

Additive Manufacturing (AM), commonly known as 3D printing, has transformed the production of medical implants by offering advantages such as material optimization, design flexibility, and customization. Selective Laser Melting (SLM) stands out as the most widely used metallic AM process in the medical sector. Titanium alloy Ti6Al4V is recognized as a biomaterial due to its lightweight, corrosion resistance, fatigue resistance, and high strength. SLM has successfully produced various functional medical implants using Ti6Al4V. Achieving functional medical implants requires post-treatments to enhance their mechanical properties. Heat treatments are typically employed to alleviate residual stresses generated during the additive manufacturing process. In this study, we explored the effects of heat treatment and Hot Isostatic Pressing (HIP) treatment on a cervical fusion cage manufacturing SLM using Ti6Al4V titanium alloy. The results indicate that both heat treatment and HIP treatment significantly reduce the internal residual stresses by over 90%, in metallic medical implants produced by SLM. This reduction positively impacts the material strength of the additively manufactured metallic device.