Abstract
Hastelloy C276, a Ni-Cr-Mo wrought alloy and generally considered as a versatile corrosion resistant alloy, is investigated for dry sliding wear against an EN 31 stainless steel (hardness 60 HRC) at 298 K. The tribological properties such as frictional force, Coefficient of friction and the wear rate on the material surface at different sliding distance are examined under different loading conditions. In the dry wear test at 40 N load, the wear rate increased by 300% as compared to 10, 20, 30 N loading conditions.The experimental results indicated reduction in coefficient of friction values and thus an increase in the frictional force with the increase in normal load. The Scanning Electron Microscope images of worn out surfaces confirm that the delamination and adhesion causes the material removal from the surface in dry sliding. Further, the analysis of the hardness characteristics of worn out surfaces shows surface hardening during sliding wear processunder 40 N loads. The study on the corrosion wear behaviour in the sulphuric acid showed a significantly lower value of corrosion rate (0.0016579 mm/y in H2SO4 solution) in comparison to other alloys frequently used in industries.
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