Surface properties and corrosion behaviour of shot peened AZ31 Mg alloy

Author:  F. Pastorek, M. Mhaede , B. Hadzima, M. Wollmann, L. Wagner
Source:  Conf Proc 2014: ICSP-12 Goslar, Germany (pgs.482-487)
Doc ID:  2014124
Year of Publication:  2014
Abstract:  
This paper reports on the effects of shot peening on the surface layer properties and corrosion behaviour of AZ31 Mg alloy. Shot peening was carried out using two sizes of ceramic balls; Z850 (Φ 850 μm) and Z150 (Φ 125- 250 μm). The Almen intensity was varied from 0.042 mmN to 0.2 mmN. The results referred to significant surface contaminants by using fine balls at high Almen intensities. The amount of these contaminants was reduced by using coarser balls and lower Almen intensities. Applying SP with different Almen intensities led to significant differences in polarization resistance and surface layer properties; residual compressive stresses and surface roughness.