STUDY OF DRY SLIDING WEAR AND CONTACT MECHANISM OF INCONEL 718 AT HIGH TEMPERATURE
Keywords:
Inconel 718, 316LN Stainless steel, sliding wear,, Pin-on-disc test, laser con-focal microscope.Abstract
In this work, dry sliding wear tests were carried out using a pin-on-disc test rig with a constant load (40 N) and sliding speed (0.8 m/s). The pins were made of austenitic 316LN stainless with three different nitrogen concentrations of 0.07, 0.11 and 0.22 wt. % and disc was made from Inconel 718. The tests were conducted at four different temperature domain ie, room temperature, 200°C, 400°Cand 550°C. In order to prevent the surface oxidation of the samples, the tests were carried out in a vacuum of 10-6 torr. It is attempted to investigate the wear mechanism of Inconel 718 by surface morphology studies and also mathematically evaluating the radius of the circular contact area, maximum contact pressure and maximum shear stress. The wear mechanism was characterized using OLYMPUS LEXT 3D laser con-focal microscope.
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