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2 Archives of Foundry Engineering

2 2011

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The method for determination of the beginning of cavitational wear through comparison of mass decrement and destroyed surface increment on the example of FeAl36 alloy

Jasionowski R., Przetakiewicz W., Zasada D.

Archives of Foundry Engineering

2011

Vol. 11, iss. 2 spec.

103--107

Cavitational erosion is the phenomenon of mechanical destruction of a material due to the implosion of cavitational bubbles. Cavitational resistance is the ability of material to oppose the effect of cavitation being determined most frequently by analysing the kinetics of destruction of a material being examined on a given device. Materials with the highest resistance to cavitational destruction are characterised by the longest incubation period and smaller destruction rate. The carried out laboratory tests of resistance to cavitational erosion showed that determination of the beginning of cavitational wear is very difficult because the kinetics of cavitational destruction depends on: test bed type, tested material and test time. The aim of presented study was to propose a method for determination of the beginning of cavitational wear through comparison of mass decrement and destroyed area increment curves on the example of FeAl36 intermetallic alloy subjected to the cavitational wear on a flux-impact test stand.

The effect of structure on the cavitational wear of FeAl intermetallic phase-based alloys with cubic lattice

Jasionowski R., Przetakiewicz W., Zasada D.

Archives of Foundry Engineering

2011

Vol. 11, iss. 2 spec.

97--102

The process of cavitational erosion induces destruction of a material which consists of plastic strains, mass decrements, phase changes, grain fragmentation and surface micro- and macro-geometry changes. Heterogeneity of this process causes the destruction of a solid body due to cavitation to be hard to predict. Examinations of many materials showed that the course of cavitation wear is basically affected by structure which allows for orientation and size of grains and their shape, fraction of small and large angle boundaries, type of phases (in multi-phase materials), interposition of their grains, grain volume fraction as well as distribution of impurities and possible defects of materials, such as cracks, pores and non-metallic inclusions. The aim of this study was to examine the effect of structure on the cavitational wear of FeAl intermetallic phase-based alloys with cubic lattice.