Synergistic regulation of oxygen and nitrogen in V-Al master alloy for aerospace Ti alloys

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-05-21 DOI:10.1016/j.vacuum.2025.114408

Yonggang Wang , Xuanwu Zhang , Jiating Man , Qiyang Chen , Jianying Yang , Kui Wang , Wei Ni

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Abstract

Vanadium and its alloys, including the widely known vanadium-aluminum (V-Al) alloy, are among the most promising materials for high-performance structural and functional applications. The structure and performance of V-Al alloys are significantly influenced by impurity elements. This study systematically analyzed the occurrence forms of oxygen (O) and nitrogen (N) impurities in V-Al alloys and investigated their sources. A synergistic regulation approach (“aluminothermy + electric heating + vacuum refining”) was implemented in industrial-scale production to control the impurity levels of O and N in the alloy, leading to the development of optimized methods for impurity control. The results reveal that the oxygen in V-Al alloys predominantly exists in the form of Al₂O₃, while nitrogen is primarily found as VN. Via tuning the CaO content in the slag and further vacuum refining as well as controlling the microscopic inclusion phases, the O and N content in the alloy can be effectively regulated. These findings provide valuable insights for the industrial production and optimization of V-Al alloys, particularly for high-end applications in the aerospace and biomedical sectors.

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航空钛合金用钒铝中间合金中氧、氮的协同调节

钒及其合金，包括众所周知的钒铝（V-Al）合金，是高性能结构和功能应用中最有前途的材料之一。杂质元素对V-Al合金的组织和性能有显著影响。本文系统分析了钒铝合金中氧(O)和氮(N)杂质的赋存形式，并对其来源进行了探讨。在工业规模生产中实施了协同调节方法（“铝热+电加热+真空精炼”）来控制合金中O和N的杂质水平，从而开发了优化的杂质控制方法。结果表明：V-Al合金中氧主要以Al2O3的形式存在，氮主要以VN的形式存在；通过调整渣中CaO含量，进一步真空精炼，控制微观夹杂相，可以有效调节合金中的O和N含量。这些发现为V-Al合金的工业生产和优化提供了宝贵的见解，特别是在航空航天和生物医学领域的高端应用。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.