采用粗丝料制备亚稳-β合金ti - 15v - 3cr - 3sn - 3al的丝弧定向能沉积:组织与力学响应

IF 7.9 2区 材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY
José L. Neves , Tomasz Wojcik , David Obersteiner , Johann Grillitsch , David Holec , Daniel Kiener , Thomas Klein
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引用次数: 0

摘要

Ti-15V-3Cr-3Sn-3Al是一种亚稳态-β合金,与热成形Ti-6Al-4V相比,最初是为了提高冷成形性和降低下游加工成本而开发的。它主要用于薄板和焊接形式,其次应用于铸件和锻件。然而,高昂的配方成本和严格的工艺窗口降低了预期的成本效益。本研究探索了使用现有粗丝格式(Ø3.0 mm)的大型组件的替代制造路线。Ti-15V-3Cr-3Sn-3Al采用等离子体电弧定向能沉积方法制备。样品在两种条件下进行评估:(1)溶液处理(2)溶液处理和时效。机械测试包括拉伸和硬度测量,而微观结构分析使用了广泛的技术。变形行为和断口表面也进行了检查。构建条件下的β相组织在晶界处含有αGB,固溶处理时αGB溶解,形成完整的β相基体。时效导致细小的α-板条析出,提供了预期的强化。在这种条件下,材料达到了1150mpa的极限抗拉强度和6%的破坏应变,仅在延性上观察到各向异性。在固溶处理条件下,拉伸试验中观察到持续的软化。该研究为Ti-15V-3Cr-3Sn-3Al在增材制造中的性能提供了见解,为钛合金的替代加工路线奠定了基础。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Wire-Arc directed energy deposition of metastable-β alloy Ti-15 V-3Cr-3Sn-3Al using thick wire feedstock: Microstructure and mechanical response

Wire-Arc directed energy deposition of metastable-β alloy Ti-15 V-3Cr-3Sn-3Al using thick wire feedstock: Microstructure and mechanical response
Ti-15V-3Cr-3Sn-3Al is a metastable-β alloy initially developed to improve cold formability and reduce downstream processing costs compared to hot-forming Ti-6Al-4V. It is primarily used in sheet and welded forms, with secondary applications in castings and forgings. However, high formulation costs and strict process windows reduce expected cost benefits. This study explores an alternative manufacturing route for large-scale components using the available thick wire format (Ø3.0 mm). Ti-15V-3Cr-3Sn-3Al was deposited via plasma-based wire-arc directed energy deposition. Samples were evaluated in two conditions: (1) solution-treated (2) solution-treated and aged. Mechanical testing included tensile and hardness measurements, while microstructural analysis used a broad range of techniques. Deformation behaviour and fracture surfaces were also examined. The β-phase microstructure in the as-built condition contained αGB at grain boundaries, which dissolved during solution treatment, leaving a fully β-phase matrix. Aging resulted in the precipitation of fine α-laths, providing expected strengthening. In this condition, the material achieved an ultimate tensile strength > 1150 MPa and failure strain > 6 %, with anisotropy observed only in ductility. In the solution-treated condition, continuous softening was observed during tensile testing. This study provides insight into properties of Ti-15V-3Cr-3Sn-3Al in additive manufacturing, laying the groundwork for alternative processing routes for titanium alloys.
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来源期刊
Materials & Design
Materials & Design Engineering-Mechanical Engineering
CiteScore
14.30
自引率
7.10%
发文量
1028
审稿时长
85 days
期刊介绍: Materials and Design is a multi-disciplinary journal that publishes original research reports, review articles, and express communications. The journal focuses on studying the structure and properties of inorganic and organic materials, advancements in synthesis, processing, characterization, and testing, the design of materials and engineering systems, and their applications in technology. It aims to bring together various aspects of materials science, engineering, physics, and chemistry. The journal explores themes ranging from materials to design and aims to reveal the connections between natural and artificial materials, as well as experiment and modeling. Manuscripts submitted to Materials and Design should contain elements of discovery and surprise, as they often contribute new insights into the architecture and function of matter.
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