A Review on Post Processing of Thermal Spray Coatings With Severe Plastic Deformation Method

Abstract

The solid particle erosion is a multifarious phenomenon and includes the degradation of material as a result of continual impingement of high speed erodent particles. Solid particleerosion can cause severe damage to system components in hydropower systems, boiler tubes, pulverized coal burner nozzles etc. Erosion mechanism is primarily influenced by velocity and impact angle of erodent particles. The size and shape of erodent particles also have significant impact on erosion. Severe plastic deformation technique is widely utilized for creating nanometric sized or ultrafine grain and improving surface region properties on the surface of materials. In this keynote paper, the studies reviewed and reveal that friction stir processing with pinless tool can be utilized to prevent damage on the surface of thermal sprayed coatings.