1.3 Strain, stress and damage evolution in alloys during cyclic loading considering interplay of microstructure, surface hardening and overload
As input to modelling, which takes into account more realistic cyclic loads that components are subjected to, this project will undertake in-situ studies of stress and strain fields within materials - considering a wide variety of paraments such as various overloads, microstructures and surface treatments.
Project summary
Most engineering components experience a wide variety of random cyclic loading during service, including occasional stress and temperature overload. The overload will affect the stress and strain evolution in the material and it has a complex interplay with the residual stresses introduced by different surface hardening treatments and the microstructure of the steel. Therefore, in order to predict fatigue behaviour and be able to tailor microstructure and surface treatment for enhanced fatigue life this interplay must be understood in detail. However, there is a lack of understanding of the development of stresses and strains in various microstructures and how it depends on the surface treatment and overloads. Large-scale infrastructures provide a unique opportunity for in-situ/operando measurement of stress and strain fields during cyclic loads considering various overloads, microstructures and surface treatments.
Key people
Project leader: Mohammad Hoseini Athar (KTH)
Project partners
KTH (coordinator), Chalmers, Curtiss Wright, Ovako, Scania,Swerim, RISE