Title: Performance of micro-crystalline ceramic alumina wheels during creep feed grinding nickel-based superalloy

Authors: Zhengcai Zhao; Jiuhua Xu; Yucan Fu; Zhiwei Zhang

Addresses: College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 210016, China ' College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 210016, China ' College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 210016, China ' College of Mechanical and Electrical Engineering, Nanjing University of Aeronautics and Astronautics, Nanjing, Jiangsu, 210016, China

Abstract: The dramatical reduction of abrasive crystallite size is an efficient way to improve grinding performance of wheels. In the present investigation, the performance of micro-crystalline ceramic alumina wheels in creep feed grinding Inconel 718 is investigated extensively. Grinding forces and temperature were measured and analysed to characterise the grinding process. Surface roughness was used to describe the quality of ground surfaces. Meanwhile, the wheel surface topography was also observed and studied. It was found that grinding forces of 5SG wheel were lower than that of SG wheel. Better surface quality and lower grinding forces and temperature were achieved by TG wheel when compared to SG wheel. Additionally, less adhesion was observed on 5SG wheel surface while dressing with higher feedrate. The results show that, grinding forces decrease when SG abrasives are blended with regular fused abrasives. High aspect ratio of TG abrasives reduces adhesion on the wheel surface. Furthermore, dressing with high feedrate enlarges chip storage space for grinding wheel.

Keywords: creep feed grinding; ceramic alumina wheels; grinding performance; nickel based superalloys; microcrystalline ceramics; grinding wheels; surface roughness; wheel surface topography; surface quality; temperature; adhesion; feed rate; grinding force; chip storage space.

DOI: 10.1504/IJAT.2014.065832

International Journal of Abrasive Technology, 2014 Vol.6 No.4, pp.314 - 323

Available online: 22 Nov 2014 *

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