Microstructural effects in abrasive wear. Quarterly progress report, 15 September 1978--15 December 1978
The purpose of this research project is to establish reliable low-stress and gouging wear rate information for a series of alloy white irons and a series of Co-base PM alloys and to correlate the wear resistance with the microstructural features and mechanical properties of these materials. The characterization of wear rates and microstructures of the alloys was presented previously. SEM characterization of the wear scars were undertaken with the intent of understanding the different responses of the alloys to the different testing conditions. Both RWAT and GAWT wear scars in Ni-Hard 4 were examined. The results of these observations were clarified after SEM/EDXS analysis of the RWAT and GAWT wear scars in the Stellite 6 alloy, in which the carbide positions in the worn surface were found using EDXS x-ray maps. The carbides protrude from the worn surfaces in all RWAT wear scars examined to date, including those of the Ni-Hard 4 alloys abraded with SiO/sub 2/ and the Stellite 6 alloy abraded with SiO/sub 2/ and Al/sub 2/O/sub 3/. The harder Al/sub 2/O/sub 3/ abrasive particles leave long continuous grooves in the surface of the Stellite 6 alloy, and they partially penetrate the Cr/sub 7/C/sub 3/ carbides. In the GAWT test, some of the alloy carbides are cut off flush with the worn matrix surface, while some undergo gross fracture and are removed in large fragments. Although quantitative ranking of the wear resistance of alloys is not yet possible by SEM analysis, useful qualitative generalizations may be made.
- Research Organization:
- Notre Dame Univ., South Bend, IN (USA). Dept. of Metallurgical Engineering and Materials Science
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 6038591
- Report Number(s):
- COO-4246-7
- Country of Publication:
- United States
- Language:
- English
Similar Records
Microstructural effects in abrasive wear. Quarterly progress report, 15 March 1978--15 June 1978
Microstructural effects in abrasive wear. Quarterly progress report, December 15, 1978--March 15, 1979
Related Subjects
010404 -- Coal
Lignite
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36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
360104 -- Metals & Alloys-- Physical Properties
ABRASIVES
ALLOYS
ALUMINIUM COMPOUNDS
ALUMINIUM OXIDES
CARBIDES
CARBON COMPOUNDS
CHALCOGENIDES
COAL GASIFICATION
COBALT ADDITIONS
COBALT ALLOYS
CRYSTAL STRUCTURE
ELEMENTS
GASIFICATION
IRON ALLOYS
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
NICKEL ADDITIONS
NICKEL ALLOYS
OXIDES
OXYGEN COMPOUNDS
SILICON COMPOUNDS
SILICON OXIDES
SURFACE PROPERTIES
THERMOCHEMICAL PROCESSES
WEAR
WEAR RESISTANCE