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Effect of burnishing lateral feed on surface roughness, microhardness and dry sliding tribological behavior of ZE41 magnesium alloy
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DOI：10.1108/ILT-05-2025-0210.png)
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Abstract
En 中文
PurposeThis study aims to investigate the mechanical and wear performance of ball-burnished ZE41 magnesium alloy with varying lateral feed to improve the service life.Design/methodology/approachBall burnishing of ZE41 alloy was performed with different lateral feeds (LF) from 25 & micro;m to 125 & micro;m. Surface topography and roughness were investigated. The cross-sectional microstructure was analyzed, and the microhardness was measured. A reciprocating wear test facility was utilized, and the coefficient of friction (COF) and wear rate were calculated. A scanning electron microscope equipped with energy dispersive X-ray spectroscopy was used to investigate the worn surface morphology.FindingsBurnishing filled voids and deformed the surface asperities plastically. The 50 & micro;m LF exhibited the best surface finish (0.481 & micro;m) with a reduction of 46.2 % in surface roughness. The burnishing affected grains near the top surface up to a layer of 293 +/- 21 & micro;m along the depth. The highest microhardness (87 +/- 4.3 HV) was observed at 50 & micro;m LF with an improvement of 33.2 %. Higher LF beyond 50 & micro;m resulted in increased surface roughness and decreased microhardness. A minimum COF (0.15) with the lowest wear rate (2.87 & times; 10-4 mm3/Nm) by a reduction of 58.3 % was observed at 50 & micro;m LF. Improvements in surface finish and microhardness are responsible for better wear performance in the burnished alloy.Originality/valueThe lateral feed influenced surface roughness, microhardness and wear resistance of ZE41 alloy significantly. This provides a theoretical approach for selection of ball burnishing parameters in industrial applications.
Keywords:
ZE41 magnesium alloy
Burnishing
Lateral feed
Surface roughness
Microhardness
Wear mechanism
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