Stress, strain, damage and failure – Archetypal Characterisation Challenge 1
A Scanning Electron Microscopy image of a crack. Image curtesy of Nader Heshmati.
Projects within the Archetypal Characterisation Challenge (ACC) related to Stress and Strain focus on designing, producing and validating materials that can withstand extreme conditions while ensuring safety, efficiency and durability. Topics such as grain structure optimization and grain boundary engineering - and their measurement - are common to applications from micro metre coatings to large components with complex geometric structures.
Projects within ACC 1
1.1 High-temperature residual stresses and phase transformations in CVD coatings
Developing and applying LSI-based diffraction methods to study Chemical Vapour Coatings of tools - providing knowledge, and a streamlined workflow for future industrial and academic R&I
1.2 Stresses and damage in super alloys during thermal and mechanical cycling
LSI experimental techniques will characterize superalloys' thermomechanical behaviour and damage development. Such experimental information will enable the development of new modelling tools for predicting microstructures and, in particular, for grain boundary engineering.
This is especially important when the microstructure variation coincides with a complex component geometry.
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.
