Abstract
Numerous fields of aircraft and engine construction are concerned by wear damage due to erosion. An original tribometer for the study of erosion is described. The basis of the study undertaken here is the notion of conceptual parameters that are the internal variables of the simulation device; it was compulsory to define and to control these variables during experimental. We have then examined the erosion phenomenon and we have defined, among various theoretical formulations, a mathematical model derived from that of Finnie and Bitter. Microstructural examinations, performed under the scanning electron microscope, show the damage phenomena due to deformation and cutting effects. A generalized law of wear by erosion, in a non-dimensional form, is proposed; it takes into account the nature and microstructure of the material, together with the angle of impact of the particles, their hardness and their sharpness. First, steel and cast-iron grades are examined as to their behaviour towards erosion; subsequently, new intermetallic FeAl ordered materials are studied.
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