Effects of Cutting Speed on Surface Integrity and Fatigue Performance of Hard Machined Surfaces

  • Youngsik ChoiEmail author
Regular Paper


The study investigates the effects of cutting speed on the surface integrity and fatigue performance of hard machined surfaces. The results demonstrated that a higher cutting speed induces more compressive residual stresses and results in an increasingly softened layer. Crack initiation and crack propagation lives were extended by up to 192% and 168%, respectively, relative to increases in the cutting speed. Consequently, the fatigue life was extended by up to 174% with increases in the cutting speed. The fatigue tests demonstrated that the cutting speed significantly influences fatigue life and that the effect further increases with decreases in the level of loading.


Hard machining Cutting speed Residual stress Microhardness Fatigue life 



This study was supported by Basic Science Research Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT & Future Planning (Grant No. 2017R1A2B4009202).


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Copyright information

© Korean Society for Precision Engineering 2019

Authors and Affiliations

  1. 1.School of Mechanical EngineeringChung-Ang UniversitySeoulSouth Korea

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