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Open AccessArticle

Experimental Study on Machinability of Zr-Based Bulk Metallic Glass during Micro Milling

1
Guangdong Provincial Key Laboratory of Micro/Nano Optomechatronics Engineering, College of Mechatronics and Control Engineering, Shenzhen University, Nan-hai Ave. 3688, Shenzhen 518060, China
2
Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen 518060, China
*
Author to whom correspondence should be addressed.
Micromachines 2020, 11(1), 86; https://doi.org/10.3390/mi11010086
Received: 13 November 2019 / Revised: 5 January 2020 / Accepted: 7 January 2020 / Published: 13 January 2020
(This article belongs to the Special Issue 10th Anniversary of Micromachines)
The micro machinability of Zr41.2Ti13.8Cu12.5Ni10Be22.5 bulk metallic glass (BMG) was investigated by micro milling with coated cemented carbide tools. The corresponding micro milling tests on Al6061 were conducted for comparison. The results showed that the tool was still in stable wear stage after milling 300 mm, and the surface roughness Ra could be maintained around 0.06 μm. The tool experienced only slight chipping and rubbing wear after milling the BMG, while a built-up edge and the coating peeling off occurred severely when milling Al6061. The influence of rotation speed on surface roughness was insignificant, while surface roughness decreased with the reduction of feed rate, and then increased dramatically when the feed rate was below 2 μm/tooth. The surface roughness increased gradually with the axial depth of cut (DOC). Milling force decreased slightly with the increase in rotation speed, while it increased with the increase in axial DOC, and the size effect on milling force occurred when the feed rate decreased below 1 μm/tooth. The results of X-ray diffraction (XRD) showed that all milled surfaces were still dominated by an amorphous structure. This study could pave a solid foundation for structural and functional applications. View Full-Text
Keywords: micro milling; bulk metallic glass; surface roughness; milling force; tool wear micro milling; bulk metallic glass; surface roughness; milling force; tool wear
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MDPI and ACS Style

Wang, T.; Wu, X.; Zhang, G.; Xu, B.; Chen, Y.; Ruan, S. Experimental Study on Machinability of Zr-Based Bulk Metallic Glass during Micro Milling. Micromachines 2020, 11, 86.

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