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<p>This study investigates the effect of varying yttrium (Y) concentrations on the microstructure and mechanical properties of Ti-0.3Mo-0.8Ni-xY (TA10-xY, <i>x</i> = 0, 0.01, 0.05, 0.1, 0.2) titanium alloys. The results indicate that Y addition significantly refines the microstructure of the TA10 titanium alloy and improves both yield strength and tensile strength, although a slight reduction in elongation is observed. Notably, at a Y content of 0.01&#xa0;wt.%, the tensile strength reaches 757.7&#xa0;MPa, which is 18.7&#xa0;MPa higher than that of the Y-free alloy. Conversely, when the Y content increases to 0.2&#xa0;wt.%, the tensile strength decreases to 608.8&#xa0;MPa, which is lower than the 638.1&#xa0;MPa of the alloy without Y. This finding suggests that excessive Y addition promotes the formation of a large number of Y<sub>2</sub>O<sub>3</sub> particles, which induces stress concentration at particle tips and ultimately degrades the mechanical properties of the alloy. Therefore, controlling the Y content is essential to achieving balanced mechanical performance in titanium alloys.</p>

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The Influence of Adding Rare Earth Element Y on the Mechanical Properties of Ti-0.3Mo-0.8Ni Titanium Alloy

  • 期刊论文

  • 发表日期：

    2026年1月5日

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  • Haowei Liang,
  • Yongsheng Wang,
  • Jie Li,
  • Shuqi Deng,
  • Zhirong Huang,
  • Han Xiao

摘要

This study investigates the effect of varying yttrium (Y) concentrations on the microstructure and mechanical properties of Ti-0.3Mo-0.8Ni-xY (TA10-xY, x = 0, 0.01, 0.05, 0.1, 0.2) titanium alloys. The results indicate that Y addition significantly refines the microstructure of the TA10 titanium alloy and improves both yield strength and tensile strength, although a slight reduction in elongation is observed. Notably, at a Y content of 0.01 wt.%, the tensile strength reaches 757.7 MPa, which is 18.7 MPa higher than that of the Y-free alloy. Conversely, when the Y content increases to 0.2 wt.%, the tensile strength decreases to 608.8 MPa, which is lower than the 638.1 MPa of the alloy without Y. This finding suggests that excessive Y addition promotes the formation of a large number of Y2O3 particles, which induces stress concentration at particle tips and ultimately degrades the mechanical properties of the alloy. Therefore, controlling the Y content is essential to achieving balanced mechanical performance in titanium alloys.