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LAMBDA: in situ LAMinography for multiple length-scale study of DAmage mechanisms in materials for transport  

At present model predictions of fracture in thin structures (such as those encountered in materials for transport technologies) are poor, especially in the presences of low levels of triaxial stress. There is a lack of understanding of damage micromechanisms in these conditions as damage features are very small, and material failure after a load path change cannot be predicted. Current in-situ tomographic imaging of rod-like samples only covers a limited range of stress states and load path changes.

The aim of LAMBDA is to study damage micromechanisms at at low levels of stress triaxiality and under biaxial load path changes using in-situ 3D imaging of large flat samples over multiple length-scales ranging from nanometres to millimetres. Concentrating in particular on aluminium alloys, these hierarchical imaging experiments will provide quantitative data as input and validation for better model prediction of damage under these conditions, advancing the understanding of  the link between microstructure  and damage micromechanisms and, at the end of the day, guidelines for the production of lighter materials.



LAMBDA is a French-German-funded co-operation between KIT (IPS & LAS) and the Centre for Materials Pierre-Marie Fourt at Mines ParisTech. 

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