Effect of ageing treatment on wear properties and electrical conductivity of Cu-Cr-Zr alloy


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Saglam I., ÖZYÜREK D. , ÇETİNKAYA K.

BULLETIN OF MATERIALS SCIENCE, cilt.34, ss.1465-1470, 2011 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 34 Konu: 7
  • Basım Tarihi: 2011
  • Doi Numarası: 10.1007/s12034-011-0344-5
  • Dergi Adı: BULLETIN OF MATERIALS SCIENCE
  • Sayfa Sayıları: ss.1465-1470

Özet

In this study, the effect of ageing processes on the wear behaviour and electrical conductivity was investigated. Prior to solid solution heat treatment at 920 degrees C and ageing at 470 degrees C, 500 degrees C and 530 degrees C for 1 h, 2 h and 3 h, respectively, the prepared samples were homogenized at 920 degrees C for 1 h. After the ageing processes, all samples were characterized in terms of electrical conductivity, scanning electron microscope (with energy dispersive X-ray spectrum (EDS)) and hardness (HV5). In wear tests, pin-on-disc type standard wearing unit was used. As a result, starting from 1 h aged specimens, orderly increase of electrical conductivity was defined. From EDS analyses it was observed that Cr rate increases as precipitates grow. With increase of Cr rate there was also a defined rise of electrical conductivity. From the wear tests, it was observed that the least wear loss was in Cu-Cr-Zr alloy aged at 500 degrees C for 2 h and the most wear loss was in specimens aged at 530 degrees C for 2 h. Furthermore, it was observed that the friction coefficient values resulting from wear rate were overlapped with hardness results and there is a decrease tendency of friction coefficient as wear distance increases.