Akademik Veri Yönetim Sistemi
Transactions of the Indian Institute of Metals, 2022 (SCI-Expanded, Scopus)
The thermal frictional behavior of AA 7075-T6 against a WC-6Co ball for different temperatures was investigated to characterize the worn surface in terms of wear rate, coefficient of friction (COF) and hardness using a high temperature pin-on-disk tribometer. Microstructural composition was depicted after etching to show the precipitates. The hardness of the sample tested at room temperature (RT) was measured as HV 158.0, which dropped by ~ 56% in the 300 °C test. The wear rate and COF values increased over 10X in accordance with test temperature. The temperature increase loosened the structure, and the wear rate was negatively affected. A detailed tribological characterization was carried out using SEM and EDX, and wear track profiles were observed by cutting the samples with EDM and then comparing with the cross-sectional profile images (WCM). At RT and 100 °C, a partial abrasive wear mechanism was present; however, the temperature increase improved plastic deformation and adhesive wear. Oxide layer formation allowed oxidation cracks, and temperature increase proportionally improved wear rate. Possible phases were investigated using XRD to show the heat treatment effect of test temperatures.