Typical Quality Defects of the „Alphin” Inserts in Engine Pistons

In the dissertation, the 5M Method, is being presented, of typical causes and consequences of quality defects of cast-iron inserts „alphin” embedded in aluminum cast. The diffusive connection of those rings, with pistons casts is being used, because of the extreme conditions in which they need to operate in, which are of high temperature and variable thermo-mechanical burden, which are in the working chamber of combustion engine.