Corrosion and Vibration: Factors affecting porous phase orientation in grey cast iron

Two specific characteristics of grey cast iron, i.e. good machinability, as well as, high vibration damping, results in widespread applications in industry. In this research the grey cast iron powder which is fabricated via machining was utilized as raw material for producing foams. The porous structures were manufactured by powder metallurgy method were subjected under two major industrial destructive processes, i.e., corrosion and vibration, in a continuous and parallel manner. To demonstrate the degradation potency and comparison of these two destructive factors, changes in the porosity phase orientation as a result of energy absorption was measured. It was found that the amount of energy absorption, which is associated with the most changes in the porosity phase orientation, is depend on porosity volume, the type of destructive processes and the priority of corrosion and vibration. In the case of two vibration and corrosion processes applied successively, the corrosive atmosphere which induced less microstructural changes is the dominant mechanism. If destructive processes are applied in parallel, a sample with a mean value of 42% porosity can absorb the maximum energy, in which vibration is the dominant mechanism for this mode.