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Abstract <p>Effect of the standard many-passage rolling (hot at 850°C with subsequent cold) and the rolling accompanied by pulsed electric current with a density 200 A/mm<sup>2</sup> on the temperature interval of martensitic transformations and mechanical properties of Ti<sub>45.0</sub>Ni<sub>50.0</sub>Hf<sub>5.0</sub> alloy manufactured by vacuum-arc remelting is studied. At the chosen modes of the standard rolling, 2.1-mm-thick plates in hot-rolled state and 1-mm-thick plates in cold-rolled state have been fabricated without macro- and microdefects. The final temperature of the reverse martensitic transformation of this alloy is 144°C, the ultimate strength 1430 MPa, and the hardness is 400 HV. The rolling with pulsed current allows one to increase the alloy plasticity resource to 40% without volume fractures, changes in mechanical properties; in this case, the final temperature of reverse martensitic transformation is 130°C.</p>

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Manufacturing Rods from a TiNiHf Alloy with High-Temperature Shape Memory Effect

  • 期刊论文

  • 发表日期：

    2026年1月1日

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  • R. D. Karelin,
  • V. S. Komarov,
  • V. V. Cherkasov,
  • U. Kh. Ugurchiev,
  • A. I. Ogarkov,
  • V. S. Yusupov,
  • V. V. Stolyarov,
  • V. A. Andreev

摘要

Abstract

Effect of the standard many-passage rolling (hot at 850°C with subsequent cold) and the rolling accompanied by pulsed electric current with a density 200 A/mm2 on the temperature interval of martensitic transformations and mechanical properties of Ti45.0Ni50.0Hf5.0 alloy manufactured by vacuum-arc remelting is studied. At the chosen modes of the standard rolling, 2.1-mm-thick plates in hot-rolled state and 1-mm-thick plates in cold-rolled state have been fabricated without macro- and microdefects. The final temperature of the reverse martensitic transformation of this alloy is 144°C, the ultimate strength 1430 MPa, and the hardness is 400 HV. The rolling with pulsed current allows one to increase the alloy plasticity resource to 40% without volume fractures, changes in mechanical properties; in this case, the final temperature of reverse martensitic transformation is 130°C.