Damping Properties of Selective Laser-Melted Medium Manganese Mn-xCu Alloy.

IF 2.3 4区工程技术 Q3 ENGINEERING, MANUFACTURING

3D Printing and Additive Manufacturing Pub Date : 2024-02-01 Epub Date: 2024-02-15 DOI:10.1089/3dp.2022.0064

Jingjing Yang, Tongbo Wei, Chunyang Zhao, Hailong Liang, Zemin Wang, Chenyu Su

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Abstract

In this work, selective laser melting (SLM) technology was applied to directly realize the in situ synthesis of medium manganese Mn-xCu (x = 30-40 wt.%) alloys based on the blended elemental powders. The effects of heat treatment on the microstructural evolution and damping properties of the SLMed Mn-xCu alloys were investigated. The metastable miscibility gap was studied by thermodynamic modeling and microhardness measurement. The results showed that γ-(Mn, Cu) phase with dendritic arm spacing (DAS) of 0.9-1.2 μm was the main constituent phase in the as-SLMed alloys, which was one to two orders of magnitude finer than those of the as-cast samples. Aging at 400-480°C for the Mn-30%Cu or 430°C for Mn-40%Cu alloys can induce spinodal decomposition, martensitic transformation, and α-phase precipitation, whose direct evidence was provided for the first time by transmission electron microscopy and 3D atom probe tomography in the work. The miscibility gap obtained from thermodynamics calculation was basically consistent with the microhardness results for the SLMed Mn-xCu alloys. Solution and aging (SA) treatment can improve the microstructure, tensile and damping properties of the SLMed Mn-xCu alloys more obviously than aging treatment. A 2.3-2.8 and 4.3-4.5 times increase was produced in damping capacity in the aged SLMed and SLMed+SAed Mn-xCu samples, respectively.

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选择性激光熔化中锰Mn–xCu合金的阻尼性能

本研究采用选择性激光熔化（SLM）技术，在混合元素粉末的基础上直接实现了中锰 Mn-xCu（x=30-40 wt.%）合金的原位合成。研究了热处理对 SLMed Mn-xCu 合金微观结构演变和阻尼特性的影响。通过热力学建模和显微硬度测量研究了可蜕变混溶间隙。结果表明，树枝状臂间距（DAS）为 0.9-1.2 μm 的 γ-（Mn，Cu）相是 SLMed 合金的主要组成相，其细度比铸造样品细一到两个数量级。Mn-30%Cu合金在400-480℃或Mn-40%Cu合金在430℃下老化可诱导尖晶分解、马氏体转变和α相析出，该研究首次通过透射电子显微镜和三维原子探针断层扫描提供了直接证据。热力学计算得出的混溶间隙与 SLMed Mn-xCu 合金的显微硬度结果基本一致。与时效处理相比，固溶时效处理能更明显地改善 SLMed Mn-xCu 合金的微观结构、拉伸和阻尼性能。老化 SLMed 和 SLMed+SAed Mn-xCu 样品的阻尼能力分别提高了 2.3-2.8 倍和 4.3-4.5 倍。

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来源期刊

3D Printing and Additive Manufacturing Materials Science-Materials Science (miscellaneous)

CiteScore

6.00

自引率

6.50%

发文量

126

期刊介绍： 3D Printing and Additive Manufacturing is a peer-reviewed journal that provides a forum for world-class research in additive manufacturing and related technologies. The Journal explores emerging challenges and opportunities ranging from new developments of processes and materials, to new simulation and design tools, and informative applications and case studies. Novel applications in new areas, such as medicine, education, bio-printing, food printing, art and architecture, are also encouraged. The Journal addresses the important questions surrounding this powerful and growing field, including issues in policy and law, intellectual property, data standards, safety and liability, environmental impact, social, economic, and humanitarian implications, and emerging business models at the industrial and consumer scales.

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