Effect of laser textured surface with different patterns on tribological characteristics of bearing material AISI 52100
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Effect of laser textured surface with different patterns on tribological characteristics of bearing material AISI 52100 PAUL JOSHUA S, DINESH BABU P School of Mechanical Engineering, SASTRA Deemed University, Thanjavur 613401, Tamilnadu, India © Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: Chrome steels are used in bearings since they possess high strength and wear resistance. However, when those parts are in service, failure happens due to sliding friction before the lifetime. To improve the durability of the American Iron and Steel Institute (AISI) 52100 chromium steel, in this work, the effect of laser surface texturing (LST) was analyzed. With the different patterns of circle and ellipse comparing with the untextured samples, the wear behavior was investigated using the pin-on-disc tribometer. The lubricant used for wear analysis is semisolid lithium grease National Lubricating Grease Institute lubricant (SKF NLGI-3). Sliding wear analysis was conducted at different loads of 10 N, 30 N and 50 N for the sliding speed of 750 r/min and 1400 r/min. The wear morphology was analyzed using a scanning electron microscope(SEM). The roughness of the samples was found using a white light interferometer. The effect of different patterns like circle and ellipse, alter the friction and wear properties of chromium alloy was observed compared with the untextured samples. LST shows considerable reduction in friction and wear for ellipsoidal pattern compared with the circular pattern because of wear debris and lubricant getting trapped. Key words: laser surface micro texturing; AISI52100; 3D surface roughness; wear; scanning electron microscopy Cite this article as: PAUL JOSHUA S, DINESH BABU P. Effect of laser textured surface with different patterns on tribological characteristics of bearing material AISI 52100 [J]. Journal of Central South University, 2020, 27(8): 2210−2219. DOI: https://doi.org/10.1007/s11771-020-4442-7.
1 Introduction One of the most important components in the majority of machines is bearings whose exact demands are found satisfactory for increasing performance as well as efficiency, reliability, and durability. The bearing which is used in railway axle boxes, constant velocity joints in automobiles and ball screws is of bearing material AISI 52100. AISI 52100 is a chrome steel material having high strength and extensively preferred for its corrosion resistance. It is very common that rolling bearing has made an impact, and throughout the years it was the subject of broad research. Sometimes it happens that a bearing does not attain its calculated
rating life. LU et al [1] created an unavoidable loss of material when there is a direct contact between metallic surfaces of the bearings. Even though the lubricants applied to the bearings reduce the friction rate, still there will be a considerable loss of material which should be taken into account. Hence the wear rate study plays a vital role in determining the life of bearing materials. Wear rate is
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