Institute of Physics of Materials AS CR, v. v. i. > Projects > Fatigue behaviour of nanostructural quasicrystalline materials based on Al

Fatigue behaviour of nanostructural quasicrystalline materials based on Al

InvestigatorIng. Alice Chlupová, Ph.D.
Number of ProjectAVOZ 2041904-I038
AgencyAkademie věd České republiky
Duration2003-10-31 - 2004-08-30

Anotace
Project was oriented to the study of basic mechanical properties and in particular the fatigue behaviour of nanostructural quasicrystalline materials based on aluminium. Material prepared by hot extrusion of nano-powder with different powder particle size was tested both at room and elevated temperatures by means of tensile test. The main purpose was to study properties for temperatures over 300°C. Behaviour of material at cyclic loading was analyzed from data obtained at symmetrical cycling in strain control regime. Measured data were compared with fatigue behaviour of commercially produced aluminium alloys. Fatigue tests were amended by fractographic studies of fracture surfaces of all tested specimens and relationship between microstructural parameters and measured mechanical properties was examined. The mechanism of fatigue crack growth and governing fracture mechanism were studied by means of fractographic analysis. Microstructural parameters of used types of extruded materials with different powder particle size were evaluated by means of electron microscopy. The main aim was to obtain original and fundamental information about this group of prospective nanostructural materials reinforced by icosahedral phase.


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