Microstructure and Mechanical Properties of FeCoNiCrAlx High-entropy Alloys by Selective Laser Melting

Chinese Journal of Mechanical Engineering: Additive Manufacturing Frontiers Pub Date : 2023-03-01 DOI:10.1016/j.cjmeam.2023.100069

Xuelong Wen, Chengbao Wang, Yadong Gong, Wenbo Liu

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引用次数: 1

Abstract

In this study, the thermal analysis theory of selective laser melting (SLM) was introduced, and different high-entropy alloy (HEA) specimens were prepared using the SLM technology. The effects of different powder sizes, elemental contents, and process parameters on the microstructure and mechanical properties of FeCoNiCrAl_x HEA specimens fabricated using SLM were analyzed. Moreover, hardness and tensile tests of these high-entropy alloys were performed. The results showed that with increasing laser power and hatch spacing, the hardness of the specimens initially increased and subsequently decreased; it also increased with increasing scanning speed. The FeCoNiCrAl_0.5 HEA specimens prepared using fine powder exhibited better tensile properties, followed by FeCoNiCrAl_0.8 HEA. However, the FeCoNiCrAl_0.5 HEA prepared using coarse powder exhibited the poorest tensile properties. A comparison of the tensile properties of the specimens at different heights revealed that the specimens formed at the middle height exhibited improved tensile properties.

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选择性激光熔炼FeCoNiCrAlx高熵合金的组织与力学性能

在本研究中，介绍了选择性激光熔化（SLM）的热分析理论，并利用SLM技术制备了不同的高熵合金（HEA）试样。分析了不同粉末尺寸、元素含量和工艺参数对SLM制备的FeCoNiCrAlx HEA试样微观结构和力学性能的影响。此外，对这些高熵合金进行了硬度和拉伸试验。结果表明，随着激光功率和舱口间距的增加，试样的硬度先增大后减小；它也随着扫描速度的增加而增加。使用细粉末制备的FeCoNiCrAl0.5 HEA试样表现出更好的拉伸性能，其次是FeCoNiCr Al0.8 HEA。然而，使用粗粉末制备的FeCoNiCrAl0.5 HEA表现出最差的拉伸性能。不同高度试样的拉伸性能比较表明，在中间高度形成的试样表现出改进的拉伸性能。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Chinese Journal of Mechanical Engineering: Additive Manufacturing Frontiers

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