SURFACE ABLATION OF 52100 BEARING STEEL USING FEMTOSECOND LASER IRRADIATION

Niroj Maharjan (), Wei Zhou and Yu Zhou ()
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Niroj Maharjan: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Wei Zhou: School of Mechanical and Aerospace Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore
Yu Zhou: Advanced Remanufacturing and Technology Centre, 3 CleanTech Loop, Singapore 637143, Singapore

Surface Review and Letters (SRL), 2019, vol. 26, issue 07, 1-8

Abstract: Laser ablation is a rapid-material removal technique with potential application in remanufacturing of bearings to clean damaged surfaces. This study reports the ablation morphology and change in surface composition of 52100 bearing steel irradiated with a femtosecond laser. A smooth ablated surface was achieved by operating the laser at fluence just above the ablation threshold, but higher fluences resulted in roughened surfaces with recast formation. Such coarse morphology is believed to result from higher energy deposition and surface melting. Minimal oxidation occurred at lower fluences. Periodic ripple patterns formed in the ablated area at low fluence; their morphology and possible formation mechanism is discussed.

Keywords: Ablation; laser cleaning; bearing steel; femtosecond laser; ripples (search for similar items in EconPapers)
Date: 2019
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DOI: 10.1142/S0218625X1850227X

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