Influence of Complementary Machining on fatigue strength of AISI 4140

摘要

Mechanical surface treatment is an additional process step in the process chain of part manufacturing to enhance performance but increasing production time and costs. Hence, different hybrid processes have been developed including Complementary Machining, which does not need a complex tool. Investigations of orthogonal Complementary Machining indicates that optimized cutting edge microgeometries can induce useful surface layer states like nanocrystalline surfaces whilst minimizing tool wear. This paper analyzes the resulting surface layer states (roughness, residual stresses, grain refinement) and their influence on fatigue strength after turning and Complementary Machining for AISI4140q&t. Implementing these analyses a deeper process understanding is accomplished. (C) 2018 Published by Elsevier Ltd on behalf of CIRP.