Pore volume evolution during hot rolling of 2050 aluminium alloys : interrupted in situ multi-resolution microtomography during plain compre

The aim of this proposal is to track pore evolution during thermo-mechanical tests representative of hot rolling using ex situ multi-resolution micro-CT of plain compression tests of large (40x60x80mm) aluminum 2050 samples at BM05. This study is critical to link the macroscopic pore evolution, previously studied in small specimens, with the industrial hot rolling process [1,2]. Using the ability to image both the full specimen (40x60x80mm) at low-resolution (20µm/pixel) and some region of interests at high-resolution (2µm/pixel), we can track pore closure or nucleation and growth (shape, size, volume, pore density) in selected volumes of interest as a function of the strain field (triaxiality and Lode parameter). Interrupted in situ plain strain condition tests will be conducted to reproduce different hot rolling schemes (temperature, thickness reduction, strain rate) and help us refine and extend the previously proposed pore evolution laws for all the mechanical conditions.