Characterization of the wear response of a modified zinc-based alloy vis-à-vis a conventional zinc-based alloy and a bearing bronze at a high sliding speed

The Influence of Lead Suspension in Oil Lubricant on the Sliding Wear Behaviour of Cast Iron

“…On the contrary, higher sliding speeds cause the alloys to show improved wear performance in dry condition [11,13]. This has been attributed to the effective formation of lead film on the sliding surfaces [11,14]. Studies suggest that the cracking tendency of the material system gets suppressed in view of increased compatibility of the matrix material surrounding the lead particles under favourable conditions of sliding [11,13,14].…”

“…Furthermore, their existence practically as a mechanical mixture in view of very limited solid solubility in the alloy matrix imparts cracking tendency [11,12,[14][15][16]. This leads to premature removal of the phase through chipping off action and hence adversely affects wear response [11,12,[14][15][16]. On the contrary, higher sliding speeds cause the alloys to show improved wear performance in dry condition [11,13].…”

“…This has been attributed to the effective formation of lead film on the sliding surfaces [11,14]. Studies suggest that the cracking tendency of the material system gets suppressed in view of increased compatibility of the matrix material surrounding the lead particles under favourable conditions of sliding [11,13,14]. Better compatibility characteristics of the matrix with the dispersed lead particles arise from the high (optimum) frictional heating conditions that cause the matrix to become viscoplastic [11,13,14].…”

“…It has been suggested that lead particles being soft produce weakening effect in the material system [11][12][13]. Furthermore, their existence practically as a mechanical mixture in view of very limited solid solubility in the alloy matrix imparts cracking tendency [11,12,[14][15][16]. This leads to premature removal of the phase through chipping off action and hence adversely affects wear response [11,12,[14][15][16].…”

“…Studies suggest that the cracking tendency of the material system gets suppressed in view of increased compatibility of the matrix material surrounding the lead particles under favourable conditions of sliding [11,13,14]. Better compatibility characteristics of the matrix with the dispersed lead particles arise from the high (optimum) frictional heating conditions that cause the matrix to become viscoplastic [11,13,14]. In such cases, the matrix effectively accommodates the lead particles offering the latter better opportunities for their effective smearing and formation of lubricating film on the sliding surfaces.…”