Elevated temperature erosive wear of metallic materials

Abstract

Solid particle erosion of metals and alloys at elevated temperature is governed by the nature of the interaction between erosion and oxidation, which, in turn, is determined by the thickness, pliability, morphology, adhesion characteristics and toughness of the oxide scale. The main objective of this paper is to critically review the present state of understanding of the elevated temperature erosion behaviour of metals and alloys. First of all, the erosion testing at elevated temperature is reviewed. This is followed by discussion of the essential features of elevated temperature erosion with special emphasis on microscopic observation, giving details of the erosion–oxidation (E–O) interaction mechanisms. The E–O interaction has been elaborated in the subsequent section. The E–O interaction includes E–O maps, analysis of transition criteria from one erosion mechanism to another mechanism and quantification of enhanced oxidation kinetics during erosion. Finally, the relevant areas for future studies are indicated.

Effect of welding conditions on erosive wear of hard-faced Co-based alloy layer

“…This is achieved by estimating the depths of deformation due to impact employing a procedure described elsewhere. 28,29 In this procedure it is assumed that the kinetic energy of impacting particles is absorbed by the plastic deformation of the eroding materials forming the crater due to impact. An eroding material having hardness (H) impacted with an impact velocity (V), by an angular particle having mass (m), the depth of deformation is obtained as where r represents the mean radius of the erodent particles, β is a constant, and density of the particles is designated by ρ p .…”

Microstructural developments during erosion of tribological steels

“…The mean strain rate during solid particle impact is directly proportional to the cube root of impact velocity. Since, the normal component of oblique impact velocity is always less than normal impact velocity, the strain rate during oblique impact is less than the strain rate during normal impact [31,32]. So, higher strain rate associated with normal erosion is liable to reduce the strain localization by higher extent of dislocation recovery and forming shear bands.…”

Application of DCT and Weld Harfacing for Enhancing Erosion Resistance of PCBN: A Review

“…Particulate material has always been a fundamental premise for material degradation, be that helicopter engine operative in dust clouds, equipment in mining industry or transportation and handling of pulverized coal [1]. Although, coal particulates cause certain material removal of the parts below specific critical velocities, but their detrimental results can easily be recognized, in a short period of time, with a change in their direction of travel by as low as 10 degrees [2].…”

“…Pulverized coal used in thermal power plants, having high mass flux and velocity, strikes the pulverized coal burner nozzle (PCBN) at different angles has justified the excessive solid particle erosion (SPE) caused by the directional change mentioned in literature [2][3][4]. Solid particle erosion also sometimes referred as impact wear is the surface deformation as a result of material degradation caused by the impingement of the solid particles with some considerable velocity on target material [1].…”