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Micro-CT based modeling of residual stresses and crack propagation in metal-ceramic composites

Donnerstag (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.

Prof. Michal Basista
Institute of Fundamental Technological Research