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Abstract <p>Despite significant advances in β-Ti (BCC) alloys, challenges persist in optimizing alloy compositions and methodologies to improve implant performance. Conventional alloys, such as Ti–6Al–4V and 316L stainless steel, exhibit limitations in biocompatibility and mechanical compatibility due to their high elastic modulus, leading to stress-shielding effects. To mitigate these issues, a novel predictive model, <i>β</i><sub>LEM</sub>, has been introduced, targeting alloys with reduced elastic modulus, initially focusing on Ti–Nb–Zr systems. Zirconium has been shown to stabilize the β phase by reducing the titanium content and increasing niobium concentration, resulting in a decrease in the elastic modulus. The Ti–40Nb–40Zr alloy (40Zr) exhibited a reduced modulus of 42 GPa in the hot-rolled state, compared to 63 GPa in the as-cast state. The <i>β</i><sub>LEM</sub> model demonstrated an inverse relationship between lattice parameter and elastic modulus, highlighting the potential of Zr-rich alloys in enhancing mechanical compatibility for biomedical applications.</p> Graphical abstract <p></p>

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New correlation between elastic modulus and composition of multiprincipal ternary β Ti–Nb–Zr-based alloys

  • 期刊论文

  • 发表日期：

    2025年1月13日

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  • Rafael Formenton Macedo dos Santos,
  • Pedro Akira Bazaglia Kuroda,
  • Rodrigo José Contieri,
  • Conrado Ramos Moreira Afonso

摘要

Abstract

Despite significant advances in β-Ti (BCC) alloys, challenges persist in optimizing alloy compositions and methodologies to improve implant performance. Conventional alloys, such as Ti–6Al–4V and 316L stainless steel, exhibit limitations in biocompatibility and mechanical compatibility due to their high elastic modulus, leading to stress-shielding effects. To mitigate these issues, a novel predictive model, βLEM, has been introduced, targeting alloys with reduced elastic modulus, initially focusing on Ti–Nb–Zr systems. Zirconium has been shown to stabilize the β phase by reducing the titanium content and increasing niobium concentration, resulting in a decrease in the elastic modulus. The Ti–40Nb–40Zr alloy (40Zr) exhibited a reduced modulus of 42 GPa in the hot-rolled state, compared to 63 GPa in the as-cast state. The βLEM model demonstrated an inverse relationship between lattice parameter and elastic modulus, highlighting the potential of Zr-rich alloys in enhancing mechanical compatibility for biomedical applications.

Graphical abstract