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Examination of tribological behaviours of aged Cu-Be alloys
(Natl Acad Sciences Ukraine, Inst Metal Physics, 2007) Yildiz, H. Burak; Yasar, Mustafa
In this examination, characteristics of wear of Cu-Be alloys are studied after application of thermal treatment of ageing to Cu-Be alloys. Cu-Be alloys were taken into solution at 820 degrees C before process of ageing and allowed for 30 min at this temperature. After fast cooling, they were aged at 400-450-500-550 degrees C for 120 min. Characteristics of a microstructure of Cu-Be alloys were determined according to analysis by a scanning electron microscopy (SEM) and energy dispersive x-ray spectroscopy (EDS) of these alloys, which have undergone to thermal treatment of ageing, but not to process of ageing. Cu-Be alloys aged at various temperatures were then corroded using pin-on-disc wear device, and thereby their characteristics of wear were examined. In wear tests, four different loads including 20-30-40-50 N and four different distances of slip including 250-500-1000-2000 m were used. As a result of such tests, it has been determined that the wear resistance of Cu-Be alloys has decreased rapidly with increase of wearing force. It was also observed that wearing losses were increased linearly depending on a distance. Worn quantities of the materials subjected to treatment of ageing especially at temperatures above 450 degrees C were increased rapidly during ageing.