Scholarlink

<p>Shape memory alloy composites have shown great potential in combining high strength and excellent functional properties. This study focuses on (TiB/La<sub>2</sub>O<sub>3</sub>)/Ti-13V-3Al composites fabricated by adding LaB<sub>6</sub> and using hot extrusion. The TiB whiskers and La<sub>2</sub>O<sub>3</sub> particles are in situ synthesized. And their orientation and distribution are meticulously designed. High-energy XRD shows that the composite mainly consists of <i>α</i>″ martensite phase, minor <i>β</i> phase, and TiB/La<sub>2</sub>O<sub>3</sub> reinforcements. The microstructural gradient is observed by combining SEM and TEM. During heating, reverse martensitic transformation (<i>α</i>″ → <i>β</i>) occurs at As = 502&#xa0;K, Ap = 553&#xa0;K, and Af = 581&#xa0;K, with activation energy of 157.60&#xa0;kJ/mol. The composites exhibit the tensile strength of 894&#xa0;MPa and elongation of 13%. The composite can achieve a recoverable strain of 4.6% at 6% pre-strain. The (TiB/La<sub>2</sub>O<sub>3</sub>)/Ti-V-Al shape memory composites possesses both excellent mechanical load-bearing and shape memory performances, promoting the application of shape memory alloys in the engineering field.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Light Weight (TiB/La2O3)/Ti-V-Al Shape Memory Composites with High Strength and Superior Strain Recovery Properties with Aligned Reinforcements

  • 期刊论文

  • 发表日期：

    2026年1月4日

查看全文
  • Yaqian Yang,
  • Shuo Wang,
  • Shining Wang,
  • Jinmin Zhang,
  • Hengpei Pan,
  • Kuishan Sun,
  • Xinrao Zhang

摘要

Shape memory alloy composites have shown great potential in combining high strength and excellent functional properties. This study focuses on (TiB/La2O3)/Ti-13V-3Al composites fabricated by adding LaB6 and using hot extrusion. The TiB whiskers and La2O3 particles are in situ synthesized. And their orientation and distribution are meticulously designed. High-energy XRD shows that the composite mainly consists of α″ martensite phase, minor β phase, and TiB/La2O3 reinforcements. The microstructural gradient is observed by combining SEM and TEM. During heating, reverse martensitic transformation (α″ → β) occurs at As = 502 K, Ap = 553 K, and Af = 581 K, with activation energy of 157.60 kJ/mol. The composites exhibit the tensile strength of 894 MPa and elongation of 13%. The composite can achieve a recoverable strain of 4.6% at 6% pre-strain. The (TiB/La2O3)/Ti-V-Al shape memory composites possesses both excellent mechanical load-bearing and shape memory performances, promoting the application of shape memory alloys in the engineering field.