Molecular dynamics study on the effects of nanorolling processes on the properties of nickel-based superalloy GH4169

F Yu and JC Li, MATERIALS RESEARCH EXPRESS, 10, 025002 (2023).

DOI: 10.1088/2053-1591/acb640

Rolling is a process that can improve the performance and roughness of machined parts and has a special economic value; therefore, the optimization of rolling process parameters is crucial to workpiece performance. In this paper, three rolling methods are used in molecular dynamics (MD) rolling simulations to study their effects on the surface of nickel-based superalloy GH4169 at the nanoscale. The surface and subsurface of the workpiece after rolling with the three different rolling methods are studied separately; in particular, a comparative analysis of the dislocation generation and movement on the subsurface, crystal defect evolution, and surface roughness was performed. The results show that the increase in subsurface dislocation density by average rolling has a significant influence on the work hardening effect, and the average roughness of the rolled groove surface is the lowest. This is an important reference for the optimization of the parameters of actual rolling processes.

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