Structure and Mechanical Properties of Al–Ce–Fe Alloy Synthesized by LPBF Method

IF 3.3 3区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Metals and Materials International Pub Date : 2024-05-30 DOI:10.1007/s12540-024-01698-6

S. V. Chernyshikhin, E. L. Dzidziguri, L. V. Fedorenko, A. A. Gromov, K. B. Larionov, M. V. Lyange, N. A. Kharitonova, E. A. Naumova, D. Yu. Ozherelkov, I. A. Pelevin, S. O. Rogachev

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Abstract

A new low-alloyed Al–Ce–Fe alloy was consolidated by laser power bed fusion (LPBF) method. The process conditions that ensure the production of samples with minimal porosity (0.2%–0.6%) and with a balance of high tensile strength (250 MPa) and elongation (15%) were determined. This combination of properties is ensured by the formation of an ultrafine structure of the degenerate eutectic and a low dislocation density. The strength of the printed alloy is 2 times higher compared with conventional alloy. The strength of the as-built alloy has superior thermal stability – up to 300 °C. In addition, heat treatment at 300 °C makes it possible to increase the plasticity of the material by 1.5 times. In combination with the high cooling rates of the LPBF process, good mechanical properties of Al–Ce–Fe were obtained due to the unique microstructure making this alloy promising as new adopted alloy for LPBF and also as matrix for new metal matrix composites expanding the range of materials suitable for metal additive manufacturing.

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LPBF 法合成的 Al-Ce-Fe 合金的结构和力学性能

采用激光功率床熔融（LPBF）方法固结了一种新型低合金化铝-铈-铁合金。确定了确保生产出孔隙率最小（0.2%-0.6%）且兼顾高抗拉强度（250 兆帕）和伸长率（15%）的样品的工艺条件。变质共晶超细结构的形成和低位错密度确保了这一特性组合。印刷合金的强度比传统合金高 2 倍。成型合金的强度具有卓越的热稳定性--最高可达 300 °C。此外，300 °C的热处理可使材料的塑性提高1.5倍。结合 LPBF 工艺的高冷却率，Al-Ce-Fe 因其独特的微观结构而获得了良好的机械性能，使这种合金有望成为 LPBF 采用的新合金，也有望成为新型金属基复合材料的基体，从而扩大适用于金属增材制造的材料范围。

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来源期刊

Metals and Materials International 工程技术-材料科学：综合

CiteScore

7.10

自引率

8.60%

发文量

197

审稿时长

3.7 months

期刊介绍： Metals and Materials International publishes original papers and occasional critical reviews on all aspects of research and technology in materials engineering: physical metallurgy, materials science, and processing of metals and other materials. Emphasis is placed on those aspects of the science of materials that are concerned with the relationships among the processing, structure and properties (mechanical, chemical, electrical, electrochemical, magnetic and optical) of materials. Aspects of processing include the melting, casting, and fabrication with the thermodynamics, kinetics and modeling.