Study on wear behaviour of aluminium-based piston alloy using different coatings

Abstract

The wear rate of a piston in an engine determines how long it can run and how much power it can produce. The wear rate of lightweight piston materials used in medium cars was examined. The piston itself was used to cut the plates after it had been formed in an aluminium alloy. It was then successfully prepared for coating with hard anodizing and tin coating after being trimmed to a diameter of 90 mm. There are a number of wear tests, including the pin on the disc test, slurry abrasion test, scratch test, and erosion test to analyse the wear rate. The coating's substance and intended applications determine which wear test is used. Slurry erosion and corrosion tests for the coating are favoured for usage on automobiles. But the pin on disc and scratch tests are frequently carried out in cases where the coating is applied dry. In the current investigation, only one variable load (30 N, 40 N, and 50 N) and sliding speed (500 rpm) was chosen for the wear test. Sliding distance (1200 m) was treated as a constant. Under dry conditions, a pin-on-disc machine was used to test the wear of the coatings and soft materials. SEM analysis was used to examine the surface morphology of the coating's worn surfaces. It was discovered that as the load grew, the coating's wear rate also did. It was discovered that as the load was raised, the coating's co-efficient of friction decreased. With the aid of an optical telescope, the microstructure of the coating's worn surfaces was also inspected, although no evidence of a change in the microstructure owing to frictional heat was discovered. It was discovered that the coating's micro hardness decreased away from the wear track at the coating's cross section. Using a SEM, adhesion, deformation, and microcutting were the main wear mechanisms seen.