On the evaluation of certain strength characteristics and fracture features of iron-based sintered MMCs with nanooxide additives

Publication date: Available online 16 April 2019Source: Materials Science and Engineering: AAuthor(s): Eugene E. Feldshtein, Larisa N. Dyachkova, Grzegorz M. KrólczykAbstractThis paper describes the changes in the mechanical properties and fracture character of ironbased composites with alumina and zirconia nanoadditives. To assess the effect of nanooxide additives one of the design of experiments methods viz the Simplex Lattice Design have been used. It was found that with the introduction of nanooxides, zones of both high and low hardness can be formed depending on their composition. The presence of nanoadditives affects the character of the stress-strain dependences and the breaking flexural and compressive stresses. The introduction of alumina nanoparticulates into the base material has a negative effect on the breaking stresses when compression and flexing, and zirconia nanoparticulates, on the contrary, substantially increase these stresses. The nanoadditives composition affects significantly the nature of MMCs based on iron fractures.Graphical abstract
Source: Materials Science and Engineering: A - Category: Materials Science Source Type: research