Examination of Crack Growth Behavior in Induction Hardened Material under Torsional Fatigue

Abstract

Induction hardening is widely used for chassis components to add compressive stress there to control crack growth, since wear resistance and fatigue fracture strength are highly required. Therefore, it is crucial that the defect influence is examined with being compressive residual stress on the parts.
In this report, the relationship between crack depth and compressive residual stress was evaluated using cylindrical specimen and torsional fatigue test. Consequently, the test results followed CAE obtained in advance. In future, it is necessary to make this method applicable to the product design to improve
vehicle safety performance further.