Shot Peening Induced Plastic Deformation in Cast Iron: Influence of Graphite Morphology
2013 (English)Manuscript (preprint) (Other academic)
Graphite morphology in cast irons strongly affects their mechanical properties like the Young’s modulus, tensile/compressive strength and cyclic mechanical behaviour. In this paper, pearlitic compact graphite iron (CGI) and grey cast iron (GI) have been studied in a scanning electron microscope (SEM) before and after being shot peened under different conditions. The plastic deformation behaviour of CGI and GI under different shot peening conditions is analysed using electron backscattering diffraction (EBSD) and electron contrast channelling imaging (ECCI). EBSD and ECCI revealed that plastic deformation around graphite inclusions depends on the size and shape of the graphite. The different response of CGI and GI to shot peening is explained by the different damping properties of the graphite and the matrix capability for plastic deformation.
Place, publisher, year, edition, pages
Shot peening, cast iron, graphite morphology, EBSD, residual stress
Engineering and Technology Materials Engineering
IdentifiersURN: urn:nbn:se:liu:diva-99839OAI: oai:DiVA.org:liu-99839DiVA: diva2:658362