Examination of tribological behaviours of aged Cu-Be alloys


Yildiz H. B. , Yasar M.

METALLOFIZIKA I NOVEISHIE TEKHNOLOGII, cilt.29, ss.1659-1672, 2007 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 29 Konu: 12
  • Basım Tarihi: 2007
  • Dergi Adı: METALLOFIZIKA I NOVEISHIE TEKHNOLOGII
  • Sayfa Sayıları: ss.1659-1672

Özet

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.