EFFECTS OF SLIDING SPEED IN A CuZn10 BRASS MATERIAL ON WEAR
Küçük Resim Yok
Tarih
2009
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
SCIBULCOM LTD
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In, this experimental study, effects of sliding speed, load, coefficient of friction and, surface roughness on sliding wear were investigated. Many properties observed in metal sliding wear processes can be explained based on studying brass. For this reason, CuZn10 brass material was selected as the experimental specimen and tests were conducted under dry sliding wear conditions. The tests were conducted on a PLINT-TE53SLIM Multi-Purpose Friction and Wear Tester as block-on-ring, one of asymmetric configuration applications (ASTM G77). The contact between test specimen and counterface is a line. And a non-suitable contact geometry was used on opposite surface. The counterface was rotated at 10 different sliding speeds (0.25, 0.5, 0.75, 1, 1.25, 1.5, 4.75, 2, 2.25 and 2.5 m/s) and three different loads (5, 10 and 15 N) were applied on the test specimen, and every test specimen was subjected to 700 in tests. Graphs showing variations of weight loss against the applied loads and sliding speeds on the test specimen were plotted. Apart from this, graphs showing relation between coefficient of friction and sliding distance and that between surface roughness and sliding distance were plotted. Due to static coefficient of friction and high surface debrises at lower sliding speeds (0.25-0.75 m/s), wear values were high, whereas in higher sliding speeds (1.0-2.5 m/s), the wear values were low as a result of formation of oxide layers on contact surfaces. As sliding distances increased during low sliding speeds, firstly the coefficient of friction increased, then as the static friction was overwhelmed the coefficient of friction decreased. At higher sliding speed, depending on the increased heat, the coefficient of friction seemed to increase generally, this being caused by the oxide layer formed. With the increase in sliding distances some increase in surface debris values was observed. In addition, the increase in the load caused the increasing weight loss and hence higher Wears values.
Açıklama
Anahtar Kelimeler
dry sliding wear, brass material, sliding speed, coefficient of friction, surface debris
Kaynak
JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION
WoS Q Değeri
Q4
Scopus Q Değeri
Q3
Cilt
15
Sayı
1