Abstract
This paper covers the phenomenon of decarbonation of the surface of the diaphragm springs for motor vehicles clutches. In certain conditions, it is possible that one part of the carbon leaves the metal surface and, therefore, its mechanical characteristics will deteriorate. Thus, the thickness of the cross-section of the core is reduced, which has a direct impact on the level of strain and the durability of diaphragm spring,. An analytical and experimental approach is presented in this paper, in order to analyze the impact of decarbonated layer upon the level of strain and durability of diaphragm springs for motor vehicles' clutches. The shown results could be a basis to make conclusions about the care needed to avoid this phenomenon during the process of production.