Investigation of local inhomogeneous strain development affected by 3D grain structure in aluminium alloy during tensile deformation

The goal of this research is to obtain direct evidence related to the initial grain microstructure and the development of local strain (notably strain concentration) in particle-containing Al alloys through the application of non-destructive synchrotron radiation techniques. This proposal proposes a novel, multiscale, and multimodal strategy by combining these sophisticated methodologies, an endeavor yet to be pursued in this field. Specifically, we aim to measure local strains by analyzing the 3D displacement of second phase particles observed through absorption micro-tomography (micro-CT) during tensile tests. Our novel method for microstructural features tracking will be utilized in detailed 3D strain mapping analysis. Furthermore, 3D grain microstructures before and during tensile deformation will be characterized using diffraction contrast tomography (DCT) and scanning 3DXRD (s-3DXRD) developed at the ESRF.