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<p>The microstructure, martensitic transformation temperatures, mechanical properties and shape memory effect of arc-based additive manufacturing Ti – 14.1V – 9.4Al – 6Zr (at.%) light high-temperature shape memory alloy were systematically studied. The research findings indicated that the Ti – 14.1V – 9.4Al – 6Zr alloy consists of α″ martensitic phase and a small quantity of β phase, and the content of the β phase increases with the augmentation of the number of deposited layers. The martensitic transformation temperature rises continuously with the increase in the number of deposited layers. The mechanical properties differ among various regions of the alloy. The top region of the alloy displays the highest elongation, attaining 15%. Through the investigation of its shape memory effect, it was observed that complete recovery occurs at a pre-strain of 3.4%. When the pre-strain is 3.8%, the middle region and the bottom region recover completely.</p>

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Microstructure and Properties of Ti–V– Al – Zr Lightweight High-Temperature Shape Memory Alloy Fabricated by Arc-Based Additive Manufacturing

  • 期刊论文

  • 发表日期：

    2025年11月1日

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  • G. Liang,
  • J. Zhao,
  • Y. B. Tian,
  • J. Han,
  • Z. Z. Dong,
  • X. Zhang

摘要

The microstructure, martensitic transformation temperatures, mechanical properties and shape memory effect of arc-based additive manufacturing Ti – 14.1V – 9.4Al – 6Zr (at.%) light high-temperature shape memory alloy were systematically studied. The research findings indicated that the Ti – 14.1V – 9.4Al – 6Zr alloy consists of α″ martensitic phase and a small quantity of β phase, and the content of the β phase increases with the augmentation of the number of deposited layers. The martensitic transformation temperature rises continuously with the increase in the number of deposited layers. The mechanical properties differ among various regions of the alloy. The top region of the alloy displays the highest elongation, attaining 15%. Through the investigation of its shape memory effect, it was observed that complete recovery occurs at a pre-strain of 3.4%. When the pre-strain is 3.8%, the middle region and the bottom region recover completely.