Laser polishing of a high-entropy alloy manufactured by selective laser melting

doi:10.1007/s11465-024-0804-4

Frontiers of Mechanical Engineering

2024, Vol. 19

Issue (5): 34 https://doi.org/10.1007/s11465-024-0804-4

本期目录

Laser polishing of a high-entropy alloy manufactured by selective laser melting

Xiaojun TAN^1,^2,^3,⁴, Haibing XIAO¹, Zihong WANG⁵, Wei ZHANG¹(

), Zhijuan SUN², Xuyun PENG²(

), Zhongmin LIU^3,⁴, Liang GUO^3,⁴, Qingmao ZHANG^3,⁴

¹. Intelligent Manufacturing and Equipment School, Shenzhen Institute of Information Technology, Shenzhen 518172, China
². Sino-German Intelligent Manufacturing School, Shenzhen City Polytechnic, Shenzhen 518116, China
³. Guangdong Provincial Key Laboratory of Nanophotonic Functional Materials and Devices, School of Information and Optoelectronic Science and Engineering, South China Normal University, Guangzhou 510006, China
⁴. Guangdong Provincial Key Laboratory of Industrial Ultrashort Pulse Laser Technology, Shenzhen 518055, China
⁵. College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China

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Abstract：

The selective laser melting (SLM) technique applied to high-entropy alloys (HEAs) has attracted considerable attention in recent years. However, its practical application has been restricted by poor surface quality. In this study, the capability of laser polishing on the rough surface of a Co-free HEA fabricated using SLM was examined. Results show that the initial SLM-manufactured (as-SLMed) surface of the Co-free HEA, with a roughness exceeding 3.0 μm, could be refined to less than 0.5 μm by laser polishing. Moreover, the microstructure, microhardness, and wear resistance of the laser-polished (LP-ed) zone were investigated. Results indicate that compared with the microhardness and wear resistance of the as-SLMed layer, those of the LP-ed layer decreased by 4% and 11%, respectively, because of the increase in grain size and reduction of the BCC phase. This study shows that laser polishing has an excellent application prospect in surface improvement of HEAs manufactured by SLM.

Key words： laser polishing selective laser melting high-entropy alloy surface roughness mechanical performance

收稿日期: 2023-12-06 出版日期: 2024-10-29

Corresponding Author(s): Wei ZHANG,Xuyun PENG

引用本文:

. [J]. Frontiers of Mechanical Engineering, 2024, 19(5): 34.
Xiaojun TAN, Haibing XIAO, Zihong WANG, Wei ZHANG, Zhijuan SUN, Xuyun PENG, Zhongmin LIU, Liang GUO, Qingmao ZHANG. Laser polishing of a high-entropy alloy manufactured by selective laser melting. Front. Mech. Eng., 2024, 19(5): 34.

链接本文:

https://academic.hep.com.cn/fme/CN/10.1007/s11465-024-0804-4
https://academic.hep.com.cn/fme/CN/Y2024/V19/I5/34

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Fig.10

Area	$ρ F C C$ /%	$ρ H A G B$ /%	$r F C C$ /μm	$r B C C$ /μm
LP-ed layer	87.5	82.4	5.5	2.9
HAZ	99.3	79.8	6.5	2.9
as-SLMed layer	74.8	75.7	1.6	0.7

Tab.3

Fig.11

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