The chemical composition of 21 alloy was modified by doubling the molybdenum (Mo) content for enhanced corrosion and wear resistance. The specimens were fabricated using a casting technique. Half of the specimens experienced a heat treatment at for an hour. The microstructure and phase analyses of the specimens were conducted using electron scanning microscopy and X-ray diffraction. The mechanical properties of the specimens were determined in terms of the ASTM Standard Test Method for Tension Testing of Metallic Materials (E8-96). The mechanical behaviors of individual phases in the specimen materials were investigated using a nano-indentation technique. The wear resistance of the specimens was evaluated on a ball-on-disk tribometer. The experimental results revealed that the increased Mo content had significant effects on the mechanical and tribological properties of the low-carbon alloy and the heat treatment also influenced these properties.
Issue Section:
Technical Papers
Keywords:
molybdenum alloys,
cobalt alloys,
corrosion resistance,
wear resistance,
chemical analysis,
heat treatment,
crystal microstructure,
scanning electron microscopy,
X-ray diffraction,
indentation,
Stellite alloy,
heat treatment,
molybdenum,
carbides,
Co solid solution,
mechanical properties,
hardness,
wear
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by American Society of Mechanical Engineers
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