Non-Destructive Evaluation Of The Stress State In The Rim Of The Railway Wheels

摘要

Residual stress can significantly influence and particularly reduce engineering properties and fatigue life of materials such as railway components. The paper presents results of stress state investigation of rail wheels new and in service by using different NDT methods. The combined use of ultrasonic, electro-magnetic Barkhausen noise and magnetic acoustic emission provide better reliability than any of separately used methods. The study will give possibility to check the state of the materials in situ, but not only in factory condition. The aim of the work is to find dependence between stress state and eventually microstructure parameters and non-destructive parameters (velocity of ultrasonic waves, Barkhausen noise and magnetic acoustic emission intensities).