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<p><i>All-d-metal</i> Heusler alloys, particularly NiMnTi-based alloys, have gained increasing attention due to their superior mechanical and caloric properties compared to traditional NiMn-based systems. These alloys exhibit robust metallic bonding, which enhances ductility and superelasticity, making them promising candidates for functional applications. Melt spinning is an effective method for producing polycrystalline NiMn-based thin ribbons; however, there remains a research gap concerning the functional and thermo-mechanical characterization of the benchmark NiMnTi alloy. The present study investigates the effects of the melt spinning process on the microstructural, structural, calorimetric, functional and mechanical properties of two NiMnTi alloys with Ti contents of 15 at.% and 18 at.%. The results suggest that wheel speed may play a relevant role in the development of residual stresses, thickness inhomogeneity and solidification defects in NiMnTi ribbons, thereby influencing their calorimetric, mechanical and functional properties. The potential elastocaloric response of NiMnTi ribbons is preliminarily investigated, highlighting the necessity of further improvements and optimization for potential future developments in mini- and microscale elastocaloric devices.</p>

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Development and thermo-mechanical characterization of NiMnTi melt-spun ribbons

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年5月28日

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  • Francesca Villa,
  • Emanuele Bestetti,
  • Mariana Rios,
  • Lara Righi,
  • Fabio Lazzari,
  • Francesca Passaretti,
  • Volodymyr Chernenko,
  • Daniel Salazar,
  • Riccardo Casati,
  • Elena Villa

摘要

All-d-metal Heusler alloys, particularly NiMnTi-based alloys, have gained increasing attention due to their superior mechanical and caloric properties compared to traditional NiMn-based systems. These alloys exhibit robust metallic bonding, which enhances ductility and superelasticity, making them promising candidates for functional applications. Melt spinning is an effective method for producing polycrystalline NiMn-based thin ribbons; however, there remains a research gap concerning the functional and thermo-mechanical characterization of the benchmark NiMnTi alloy. The present study investigates the effects of the melt spinning process on the microstructural, structural, calorimetric, functional and mechanical properties of two NiMnTi alloys with Ti contents of 15 at.% and 18 at.%. The results suggest that wheel speed may play a relevant role in the development of residual stresses, thickness inhomogeneity and solidification defects in NiMnTi ribbons, thereby influencing their calorimetric, mechanical and functional properties. The potential elastocaloric response of NiMnTi ribbons is preliminarily investigated, highlighting the necessity of further improvements and optimization for potential future developments in mini- and microscale elastocaloric devices.