Micro-CT based modeling of residual stresses and crack propagation in metal-ceramic compositesDonnerstag (06.07.2017) 15:00 - 15:20 Uhr Bestandteil von:
Micro-computed tomography (micro-CT) of real material microstructure are employed in numerical modeling of thermal residual stresses and fracture in metal-ceramics composites manufactured by powder metallurgy or metal infiltration of porous ceramic preforms. Two case studies are considered in detail to illustrate the proposed approach at work: (i) thermal residual stresses in sintered Cr/Al2O3 and NiAl/Al2O3 particulate composites, and (ii) J-integral for compact tension test specimen made of alumina preform infiltrated with molten copper. Comparisons with experimental measurements are shown. Effectiveness an limitations of the proposed method are discussed.