Abstract
Nickel-based single crystal superalloy has no grain boundary, which leads to the removal mechanism difference between single crystal material and polycrystalline material. Firstly, the removal mechanism of grinding nickel-based single crystal superalloy is analysed. Then, the developed prediction model of the tangential force F t and the normal force F n are established. Forthermore, the impacts of grinding parameters on grinding force and microstructure of grinding surface and sub-surface are analysed. Finally, some measurements to reduce or prevent recrystallization are proposed. As a result, the most shear slipping planes of nickel-based single crystal superalloy are {111} planes; with the increasing of the feeding rate and grinding depth, the micro-grinding force and the thickness of subsurface plastic deformation increase; the micro-grinding force and the thickness of subsurface plastic deformation decrease with the increasing of spindle speed. These results have some theoretical and engineering significance to the production of single crystal material parts.
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Recommended by Associate Editor Hyung Wook Park
Yadong Gong is currently a Professor and a Ph.D. candidate Supervisor at Northeastern University, China. His main research interests include micro precision process, grinding mechanism and digital manufacturing.
Yunguang Zhou is currently a Ph.D. student at Northeastern University, China. His research interests include micro grinding and precision machining.
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Gong, Y., Zhou, Y., Wen, X. et al. Experimental study on micro-grinding force and subsurface microstructure of nickel-based single crystal superalloy in micro grinding. J Mech Sci Technol 31, 3397–3410 (2017). https://doi.org/10.1007/s12206-017-0629-8
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DOI: https://doi.org/10.1007/s12206-017-0629-8