Deformation of microstructures due to low-velocity particulate erosion of ductile metals by spherical particles

Conference · Sat Jan 01 00:00:00 EST 1983

OSTI ID:6527101

Follansbee, P S; Banerjee, D; Williams, J C

A simple cumulative damage model has been developed for the low-velocity, normal-incidence, erosion of ductile metals by spherical particles. The model correlates the computed plastic-strain distribution for different impact velocities and materials with the experimentally measured erosion rates. This paper describes the surface and sub-surface changes which occur in Cu and Cu-6 wt % Al specimens during erosion testing. Scanning and transmission electron microscopy have been used to study these changes in order to determine whether the deformed microstructures are consistent with the predictions of the model. Because the deformation due to the impact of a 50/sup 0/m-diameter spherical particle occurs at high strain rates (10/sup 6/ s/sup -1/) and is also highly localized, the deformation mechanisms differ slightly from bulk deformation which has been reported for low strain rates. The contribution of strain localization (adiabatic shear) and twinning is discussed in light of the microstructural observations. 7 figures.

• Research Organization: Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 6527101
• Report Number(s): LA-UR-82-2428; CONF-830402-1; ON: DE82021890
• Resource Relation: Conference: International conference on weat of materials - mechanisms and control of wear, Washington, DC, USA, 11 Apr 1983; Other Information: Portions are illegible in microfiche products
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM ALLOYS
EROSION
COPPER
COPPER BASE ALLOYS
DEFORMATION
MICROSTRUCTURE
SCANNING ELECTRON MICROSCOPY
TRANSMISSION ELECTRON MICROSCOPY
ALLOYS
COPPER ALLOYS
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
ELEMENTS
METALS
MICROSCOPY
TRANSITION ELEMENTS
360105* - Metals & Alloys- Corrosion & Erosion