Analysis of gradient features and strengthening mechanisms of the Inconel 718 surface layer under robot belt constant-force grinding

XK Huang and JM Zhan and BW Qi and WX Guo and XK Ren and YF Guo and HB Chen and XQ Chen, TRIBOLOGY INTERNATIONAL, 200, 110061 (2024).

DOI: 10.1016/j.triboint.2024.110061

Robot belt constant-force grinding is an efficient way to precisely machine Inconel 718. After grinding, a strengthened layer is formed on the workpiece surface, affecting the service performance of the workpiece. However, gradient features of the strengthened layer of Inconel 718 are still not clear. In this paper, the gradient features and mechanical properties including microhardness, Young's modulus, and yield strength of the ground surface layer are comprehensively analyzed. With the assistance of MD simulations, material deformation behaviors and strengthening mechanisms are further investigated. Dislocation tangles and pile-ups, stacking faults and stair-rod dislocations are the main mechanisms of dislocation strengthening. The research provides important theoretical reference for robot belt constant-force grinding Inconel 718 components.

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