Journal
JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
Volume 25, Issue 11, Pages 4980-4987Publisher
SPRINGER
DOI: 10.1007/s11665-016-2363-2
Keywords
adhesive wear; galling; galling(50); tribotesting; wear mechanism
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Funding
- Board of Research in Nuclear Sciences (BRNS), Department of Atomic Energy, Mumbai
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Galling behavior of three different stainless steels (SS 316, 316 L and 416) was evaluated at room temperature and 300 A degrees C under a self-mated condition. An indigenously fabricated galling tester was used to evaluate the galling performance of mated materials as per ASTM G196-08 standard. The variation in frictional torque was recorded online during the test to assess the onset of galling. The galling(50) (G(50)) stress value was used to compare the galling resistance of a combination of materials, and the results indicate a significant influence of temperature on the galling resistance of the materials tested. This has been attributed to the decrease in hardness and yield strength at elevated temperature which results in softening of the steel and limits its ability to resist severe deformation. Scanning electron micrographs of the galled surface reflected a severe plastic deformation in sliding direction, and a typical adhesive wear mechanism is prevalent during the galling process.
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