Platelet mechanism of erosion of ductile metals

Conference · Sat Nov 01 04:00:00 UTC 1980

OSTI ID:6744307

Bellman, R Jr; Levy, A

The removal of material from the surface of a ductile metal by small impacting particles is a design concern to the builders of synthetic fuels plants that utilize pulverized coal to produce gaseous forms of fuel. A series of room temperature experiments was conducted to determine the mechanism of material removal when an erosive particle stream impacts on a ductile metal surface. 1100-0 and 7075-T6 aluminum were used for the target and 600 ..mu..m SiC particles moving at a velocity of 100 fps in air for the eroding stream. It was determined that a combined forging-extrusion mechanism that produces small, highly distressed platelets of target material that are knocked off the surface by succeeding particle impacts is responsible for erosion at both low and high impingement angles. The proposed mechanism is a significant departure from the previously believed micro-machining mechanism of erosion of ductile metals.

• Research Organization: California Univ., Berkeley (USA). Lawrence Berkeley Lab.
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 6744307
• Report Number(s): LBL-11341(Rev.); CONF-810301-1(Rev.)
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404* -- Coal
Lignite
& Peat-- Gasification
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
ALUMINIUM
CARBIDES
CARBON COMPOUNDS
COAL GASIFICATION PLANTS
ELEMENTS
EROSION
INDUSTRIAL PLANTS
MATERIALS
METALS
POWDERS
SILICON CARBIDES
SILICON COMPOUNDS
SURFACES