Study of particle rebound characteristics and material erosion at high temperature

Technical Report · Mon Oct 01 04:00:00 EDT 1990

DOI:https://doi.org/10.2172/6474930· OSTI ID:6474930

Tabakoff, W; Hamed, A; Metwally, A; Yeuan, J; Pasin, M ^[1]

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1. Cincinnati Univ., OH (USA). Dept. of Aerospace Engineering and Engineering Mechanics

An experimental investigation was conducted to study the ash particle rebound characteristics and the associated erosion behavior of superalloys and aluminide coatings subjected to gas-particle flows at elevated temperatures. At three-component LDV system was used to measure the restitution parameters of 15 micron mean diameter coal ash particles impacting some widely used superalloys and coatings at different angles. Results show the variation restitution ratios with the impingement angle for the coated and uncoated superalloys. Experimental results were used to develop correlations for the restitution parameters for coated and uncoated superalloys. A theoretical model based on elastic-plastic theory has been developed to simulate single solid particle impacts on solid targets. The erosion behaviors of many superalloys and protective coatings have also been investigated experimentally at high temperatures using a specially designed erosion tunnel. Also, the cumulative effect of the impacting particle mass on the weight loss and erosion rate were investigated. Semi-empirical erosion equations were developed for these materials based on the experimental erosion data and correlations of the restitution parameters. Coatings tested include: platinum alimunides, cobalt aluminides, nickel aluminides, rhodium platinum aluminides, and chromium carbide. Superalloys tested were nickel base alloys Inco in-738 and Mar-M246, as well as Cobalt base alloys X40 and FSX-414. 10 refs., 86 figs., 5 tabs.

• Research Organization: Oak Ridge National Lab., TN (USA); Cincinnati Univ., OH (USA). Dept. of Aerospace Engineering and Engineering Mechanics
• Sponsoring Organization: DOE/FE
• DOE Contract Number: AC05-84OR21400
• OSTI ID: 6474930
• Report Number(s): ORNL/Sub-84-89628/03; ON: DE91004410
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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Lignite
& Peat-- Combustion
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200104 -- Fossil-Fueled Power Plants-- Components
36 MATERIALS SCIENCE
360105 -- Metals & Alloys-- Corrosion & Erosion
AEROSOL WASTES
ALLOY-NI53CR19FE19NB5MO3
ALLOYS
ALUMINIUM ADDITIONS
ALUMINIUM ALLOYS
ALUMINIUM COMPOUNDS
ASHES
BOILERS
CARBIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
CHROMIUM ALLOYS
CHROMIUM CARBIDES
CHROMIUM COMPOUNDS
COAL
COATINGS
COBALT ALLOYS
COBALT BASE ALLOYS
COMBUSTION
CORROSION RESISTANT ALLOYS
CRYSTAL STRUCTURE
ENERGY SOURCES
EROSION
FLY ASH
FOSSIL FUELS
FUELS
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
INCONEL 718
INCONEL ALLOYS
IRON ALLOYS
MATERIALS
MATHEMATICAL MODELS
MICROSTRUCTURE
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NICKEL BASE ALLOYS
NIOBIUM A
OXIDATION
PLATINUM COMPOUNDS
PROCESSING
PROTECTIVE COATINGS
REFRACTORY METAL COMPOUNDS
RESIDUES
RHODIUM COMPOUNDS
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
WASTES