Achieving superelastic shape recoverability in smart flexible CuAlMn metamaterials via 3D printing

IF 14 1区 工程技术 Q1 ENGINEERING, MANUFACTURING
Dan Zheng , Ruidi Li , Jingtao Kang , Mengjie Luo , Tiechui Yuan , Changjun Han
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Abstract

Despite the remarkable advancements in the additive manufacturing of metamaterials, tradeoffs remain between functionality and mechanical performance owning to static configuration, which limits their application, particularly in areas that require efficient multifunctionality. In this paper, we present a novel approach for fabricating multifunctional smart flexible metal metamaterials using laser powder bed fusion technology. This approach enables the reversible recovery superelastic strain exceeding 20 % with a 100 % recovery rate—ten times higher than that observed in the printed alloy. This is achieved by utilising an innovative metamaterial structural design and a novel shape memory alloy powder. To achieve the aforementioned purpose, the metamaterial unit cells were initially designed to ensure flexible deformation ability with a Poisson's ratio of zero. Then, we prepared a novel shape memory alloy composition of Cu-18at%Al-l0at%Mn-0.3 at%Si, which exhibited excellent printability and adaptability within the laser powder bed fusion additive manufacturing process. Additionally, the printed SMA exhibited superelasticity, one-way and two-way shape memory effect under varying parameters. Furthermore, the combination of multifunctionality into the flexible CuAlMn metamaterials was achieved by manipulating process parameters. Remarkably, the printed metamaterial demonstrates exceptional flexibility deformation, and presents superelasticity or shape memory effect, ensuring the recovery of its original shape after experiencing deformation. This work not only demonstrates the vast potential of utilising additive manufacturing technology for fabricating functional and adaptable metal metamaterials but also presents an innovative approach for creating smart metal metamaterial.

Abstract Image

Abstract Image

通过 3D 打印实现智能柔性铜铝锰超材料的超弹性形状恢复能力
尽管超材料的增材制造技术取得了长足进步,但由于静态配置的原因,功能性和机械性能之间仍然存在折衷,这限制了超材料的应用,尤其是在需要高效多功能性的领域。在本文中,我们介绍了一种利用激光粉末床熔融技术制造多功能智能柔性金属超材料的新方法。这种方法能够可逆地恢复超过 20% 的超弹性应变,恢复率为 100%,比在印刷合金中观察到的恢复率高出十倍。这是通过利用创新的超材料结构设计和新型形状记忆合金粉末实现的。为实现上述目的,我们首先设计了超材料单元,以确保泊松比为零时的柔性变形能力。然后,我们制备了一种由 Cu-18at%Al-l0at%Mn-0.3 at%Si 组成的新型形状记忆合金,这种合金在激光粉末床熔融增材制造工艺中表现出优异的可印刷性和适应性。此外,打印出的 SMA 在不同参数下表现出超弹性、单向和双向形状记忆效应。此外,通过调节工艺参数,还实现了柔性铜铝锰超材料的多功能组合。值得注意的是,印刷超材料表现出了非凡的柔性变形能力,并呈现出超弹性或形状记忆效应,确保其在经历变形后能恢复原来的形状。这项工作不仅展示了利用增材制造技术制造功能性和适应性金属超材料的巨大潜力,还提出了一种制造智能金属超材料的创新方法。
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来源期刊
CiteScore
25.70
自引率
10.00%
发文量
66
审稿时长
18 days
期刊介绍: The International Journal of Machine Tools and Manufacture is dedicated to advancing scientific comprehension of the fundamental mechanics involved in processes and machines utilized in the manufacturing of engineering components. While the primary focus is on metals, the journal also explores applications in composites, ceramics, and other structural or functional materials. The coverage includes a diverse range of topics: - Essential mechanics of processes involving material removal, accretion, and deformation, encompassing solid, semi-solid, or particulate forms. - Significant scientific advancements in existing or new processes and machines. - In-depth characterization of workpiece materials (structure/surfaces) through advanced techniques (e.g., SEM, EDS, TEM, EBSD, AES, Raman spectroscopy) to unveil new phenomenological aspects governing manufacturing processes. - Tool design, utilization, and comprehensive studies of failure mechanisms. - Innovative concepts of machine tools, fixtures, and tool holders supported by modeling and demonstrations relevant to manufacturing processes within the journal's scope. - Novel scientific contributions exploring interactions between the machine tool, control system, software design, and processes. - Studies elucidating specific mechanisms governing niche processes (e.g., ultra-high precision, nano/atomic level manufacturing with either mechanical or non-mechanical "tools"). - Innovative approaches, underpinned by thorough scientific analysis, addressing emerging or breakthrough processes (e.g., bio-inspired manufacturing) and/or applications (e.g., ultra-high precision optics).
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