Abstract
In this study, tribological characteristics and wear debris morphology of A390 and A515 alloys are evaluated and compared. Components with a high wear resistance slide are typically made with alloys are A390 and A515, while components with high hardness requirements are usually made up with SS410. Those alloys were used in brake pads, and SS410 steel is used for the brake disc. Speed and pad force are the two factors that affect tribological characteristics such as friction coefficient and wear rate. Wear debris and wear track were examined by scanning election microscopy and optical microscope, respectively. The effect of sliding speed variations on wear and friction coefficient at various load conditions was also evaluated, and a comparative analysis was reported based on wear rates, coefficient of friction, and debris morphology for both materials. The A515 alloys shows higher friction coefficient under all the process conditions except at very low loads and high speeds due to increased superficial hardness and the composition of the case layer (oxygen-diffused/oxide formed).
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