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<p>In this study, fibers from industrial titanium alloy VT6 were obtained by pendent drop melt extraction. These rapidly solidified fibers are of interest for the production of porous titanium materials used as dampers, filters, or medical implants. To obtain such materials, the authors have analyzed the microstructure, phase composition, and mechanical properties of the rapidly solidified fibers and obtained porous sintered samples, the characteristics of which have also been studied. Sintering was carried out at 750–950 °C for 2 h. The structure and phase composition were analyzed by optical and electron microscopy, as well as by X‑ray diffraction analysis. The mechanical properties were studied by measuring microhardness and tensile strength (fibers), or by performing compression testing and determining the proportional limit depending on the sintering temperature (sintered materials). It was found that rapid solidification leads to the formation of a&#xa0;metastable phase composition of the alloy, represented by the martensitic α’-phase and β‑phase. The rapidly solidified fibers exhibit high microhardness (447.4 <i>HV</i>), as well as good ductility during tension and cold pressing. It has been established that heating and sintering lead to the martensite breakdown and formation of a&#xa0;lamellar microstructure of the (α+β)-alloy. Temperature greatly affects the morphology of the structure. Higher sintering temperatures also lead to a&#xa0;reduced number of defects in the sintered contact zone, along with an increase in contact size, and an improvement in compressive strength.</p>

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Production of rapidly solidified fibers and porous materials from VT6 alloy

  • 期刊论文

  • 发表日期：

    2025年10月7日

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  • K. S. Senkevich,
  • O. Z. Pozhoga,
  • A. A. Chernyshova

摘要

In this study, fibers from industrial titanium alloy VT6 were obtained by pendent drop melt extraction. These rapidly solidified fibers are of interest for the production of porous titanium materials used as dampers, filters, or medical implants. To obtain such materials, the authors have analyzed the microstructure, phase composition, and mechanical properties of the rapidly solidified fibers and obtained porous sintered samples, the characteristics of which have also been studied. Sintering was carried out at 750–950 °C for 2 h. The structure and phase composition were analyzed by optical and electron microscopy, as well as by X‑ray diffraction analysis. The mechanical properties were studied by measuring microhardness and tensile strength (fibers), or by performing compression testing and determining the proportional limit depending on the sintering temperature (sintered materials). It was found that rapid solidification leads to the formation of a metastable phase composition of the alloy, represented by the martensitic α’-phase and β‑phase. The rapidly solidified fibers exhibit high microhardness (447.4 HV), as well as good ductility during tension and cold pressing. It has been established that heating and sintering lead to the martensite breakdown and formation of a lamellar microstructure of the (α+β)-alloy. Temperature greatly affects the morphology of the structure. Higher sintering temperatures also lead to a reduced number of defects in the sintered contact zone, along with an increase in contact size, and an improvement in compressive strength.