Synthesis of Ti–55531 Multicomponent Alloy by the Energy-Efficient Hydride Cycle Method

IF 0.5 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY International Journal of Self-Propagating High-Temperature Synthesis Pub Date : 2025-01-20 DOI:10.3103/S1061386224700237

A. Aleksanyan, D. Mayilyan

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Abstract

This investigation aimed to synthesize Ti–5Al–5V–5Mo–3Cr–1Zr (Ti–55531) alloy by energy-efficient “hydride cycle” (HC) method. From X-ray powder diffraction it was found that the synthesized alloy consists of two phases: HCP α and BCC β. Scanning electron microscopy (SEM) unveiled discernible surface characteristics on the Ti–55531 alloy, delineating two predominant phases with distinct variations in light and dark shades. These observed phases corresponded to microstructural compositions attributed to the α and β phases. The interaction of obtained Ti–55531 alloy with hydrogen in self-propagating high-temperature synthesis (SHS) mode was studied. It was demonstrated that the compacted alloy without preliminary crushing or mechanical treatment could absorb 3.4 wt % of hydrogen during the SHS process. Additionally, it was determined that the synthesized hydride of multicomponent alloy consists of two phases: TiH₂ phase with FCC structure and β-phase with BCC structure. The thermal stability of synthesized hydride was analyzed using differential thermal analysis (DTA) method, revealing a hydrogen desorption process characterized by two endo-peaks at 334 and 574°C.

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高效氢化物循环法制备Ti-55531多组分合金

本研究旨在采用高能效“氢化物循环”（HC）法合成Ti-5Al-5V-5Mo-3Cr-1Zr （Ti-55531）合金。x射线粉末衍射结果表明，合成的合金由HCP α和BCC β两相组成。扫描电子显微镜（SEM）揭示了Ti-55531合金的表面特征，描绘了两个主要相，具有明显的明暗变化。这些相对应于α相和β相的显微组织组成。研究了制备的Ti-55531合金在自传播高温合成（SHS）模式下与氢的相互作用。结果表明，未经预破碎或机械处理的压实合金在SHS过程中可吸收3.4 wt %的氢。结果表明，合成的多组分合金氢化物由两相组成：具有FCC结构的TiH2相和具有BCC结构的β相。用差热分析（DTA）方法分析了合成氢化物的热稳定性，揭示了在334和574℃处有两个内峰的氢脱附过程。

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来源期刊

International Journal of Self-Propagating High-Temperature Synthesis MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

33.30%

发文量

期刊介绍： International Journal of Self-Propagating High-Temperature Synthesis is an international journal covering a wide range of topics concerned with self-propagating high-temperature synthesis (SHS), the process for the production of advanced materials based on solid-state combustion utilizing internally generated chemical energy. Subjects range from the fundamentals of SHS processes, chemistry and technology of SHS products and advanced materials to problems concerned with related fields, such as the kinetics and thermodynamics of high-temperature chemical reactions, combustion theory, macroscopic kinetics of nonisothermic processes, etc. The journal is intended to provide a wide-ranging exchange of research results and a better understanding of developmental and innovative trends in SHS science and applications.