Investigation of the tribological properties of silicon containing zinc–aluminum based journal bearings

Çuvalcı, Hamdullah; Baş, Hasan

doi:10.1016/j.triboint.2003.10.006

Cited by 44 publications

(30 citation statements)

References 17 publications

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“…Wear resistance increaes along with the Al content in the alloy. Thus, the alloys are characterized with a significantly greater wear resistance than hyper-eutectoid or eutectoid alloys [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…Copper forms a solid solution with zinc from which the dendrites are built. Copper is, however, also present in minimal quantities in the eutectoid mixture [1][2][3][4][5][6][7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

“…The particles that are too small may be ripped out of the alloy's surface during the wearing process; too big particles may break into smaller pieces. The addition of silicon may positively influence other properties of the alloy, for example its corrosion resistance [4,[7][8][9][10].…”

Section: Introductionmentioning

confidence: 99%

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Influence of heat treatment on the wear resistance of the ZnAl40Cu1.5Ti1.5 alloy

Michalik

Iwaniak

Wieczorek

2017

Archives of Metallurgy and Materials

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INFLUENCE OF HEAT TREATMENT ON THE WEAR RESISTANCE OF THE ZnAl40Cu1.5Ti1.5 ALLOYZn-Al-Cu alloys are predominantly used due to their tribological properties. One of the crucial issues related to the use of Zn-Al alloys is their dimensional instability. Partial replacement of copper with titanium greatly contributes to the reduction of the dimensional instability issue. The study involved the ZnAl40Cu1.5Ti1.5 alloy. In this work, microstructure and wear properties of ZnAl40Cu1.5Ti1.5 alloy were studied in both as-cast and heat treated conditions. The heat treatment was performed by solution treatment at a temperature of 385°C for 24 hours, quenching in cold water and artificial aging at 125°C for 3 hours. The hardness tests enabled to specify the optimum ageing time span, which amounts to 3 hours. Wear tests indicated that the ZnAl40Cu1.5Ti1.5 alloy is characterized with high wear resistance. It was also observed that the applied heat treatment increases the wear resistance of the experimental alloy.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Influence of heat treatment on the wear resistance of the ZnAl40Cu1.5Ti1.5 alloy

Michalik

Iwaniak

Wieczorek

2017

Archives of Metallurgy and Materials

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“…The promising way is to incorporate or generate thermally stable microconstituent particles, e.g., by adding an element with a high melting point such as silicon to form in situ silicon particles. The resulting Si particle (Si p ) reinforced ZA27 composites (Si p /ZA27) can overcome the disadvantages of the ZA27 alloy (Lee et al, 1987;Savaşkan and Bican, 2005;Savaşkan and Aydıner, 2004;Prasad, 2000Prasad, , 2004Harmsen et al, 1996;Çuvalcı and Baş, 2004;Jian et al, 1993;Shi et al, 1997). However, owing to the wide solidification interval of the ZA27 alloy matrix, the composite is also prone to shrinkage and other casting defects, and therefore, the mechanical properties will be deteriorated (Calayag, 1983;Apelian et al, 1981).…”

Section: Introductionmentioning

confidence: 99%

Effects of reheating temperature and time on microstructure and tensile properties of thixoformed in situ Si<SUB align="right">p/ZA27 composites

Wang

Chen

Zhang

2017

IJMPT

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Abstract:The effects of reheating temperature and time on microstructure and tensile properties of thixoformed in situ Si p /ZA27 composites have been investigated. Simultaneously, the effect of the Si particles on the tensile properties has also been studied. The results indicate that the two parameters have similar effects on the composition, fraction and segregation degree of the liquid phase and the size and shape of the Si particles, and thus the solidification behaviour, the resulting microstructure, the fracture regime and the tensile properties. But in contrast, the effects of the reheating temperature are larger than those of the reheating time; the effects of the changes in the Si particle size and shape are smaller than those of the changes in the other factors. The optimum tensile properties, the ultimate tensile strength of 363 MPa and the elongation of 0.97%, can be obtained after being thixoformed under reheating for 70 min at 465°C. The Si particles exhibit two behaviours during tensile testing; namely fragmentation and interfacial de-bonding. This indicates that the load transfer mechanism is the main strengthening mechanism of the Si particles.Keywords: Si p /ZA27 composites; thixoforming; microstructure; tensile properties; fracture.Reference to this paper should be made as follows: Wang, B., Chen, T.J. and Zhang, S.Q. (2017) Biographical notes: B. Wang is a graduate student and studied on the effect of process parameters on microstructure and tensile properties of thixoformed in situ Si p /ZA27 composites at Lanzhou University of Technology (LUT).T.J. Chen is a Professor at LUT. His research focuses on fabrication and forming of nonferrous alloys and their composites, such as traditional casting and semisolid forming of Al, Zn, Mg-based alloys and their composites. His research area also covers corrosion behaviours and surface modification of Mg alloys.Effects of reheating temperature and time on microstructure 127 S.Q. Zhang is a doctoral student and studied on the effect of process parameters on microstructure and tensile properties of thixoformed in situ Mg 2 Si/AM60B composites at LUT.

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“…Positive results are brought by the use of Zn-Al alloys in bearings exposed to high loads operating i.a in mining, milling machines, elevators, etc. The advantages of the Zn-Al alloys include the following: low melting point, good castability, high strength and hardness, good fatigue strength, low density, low coefficient of friction, low wear rate, low cost of manufacturing [3]. However, these alloys are used at moderate friction speed, which results from a significant deterioration of features after exceeding the temperature of 100…”

Section: Introductionmentioning

confidence: 99%

Study On Nanohardness Of Phases Occurring In ZnAl22Cu3 And ZnAl40Cu3 Alloys

Michalik¹,

Chmiela²

2015

Archives of Metallurgy and Materials

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Zn-Al alloys are mainly used due to their high tribological and damping properties. A very important issue is determination of the hardness of the phases present in the Zn-Al-Cu alloys. Unfortunately, in literature there is lack of studies on the hardness of the phases present in the alloys Zn-Al-Cu. The aim of this research was to determine the hardness of the phases present in the ZnAl22Cu3Si and ZnAl40Cu3Si alloys. The scope of the research included examination of the structure, chemical composition of selected micro-regions and hardness of phases present in the examined alloys. The research carried out has shown, that CuZn 4 phase is characterized by a similar hardness as the hardness of the interdendritic areas. The phases present in the structure of ZnAl40Cu3 and ZnAl22Cu3 alloys after soaking at the temperature of 185 O C are characterized by lower hardness than the phase present in the structure of the as-cast alloys.Keywords: ZnAl22Cu3 alloy, ZnAl40Cu3 alloy, nanohardness, structure Stopy Zn-Al stosowane są przede wszystkim z uwagi na swoje wysokie właściwości tribologiczne i tłumiące. Bardzo ważnym zagadnieniem jest określenie twardości faz występujących w stopach Zn-Al-Cu. W literaturze brak jednak opracowań dotyczących twardości faz występujących w stopach Zn-Al-Cu. Celem przeprowadzonych badań było określenie twardości faz występujących w stopach ZnAl22Cu3Si oraz ZnAl40Cu3Si. Zakres badań obejmował badania struktury, składu chemicznego w wybranych mikroobszarach oraz badania twardości faz występujących w badanych stopach. Przeprowadzone badania wykazały, że faza CuZn 4 charakteryzuje się zbliżoną twardością do twardości obszarów międzydendrytycznych. Fazy obecne w strukturze stopów ZnAl22Cu3 oraz ZnAl40Cu3 po wygrzewaniu w temperaturze 185• C charakteryzują się mniejszą twardością niż fazy obecne w strukturze stopów w stanie po odlaniu.

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Investigation of the tribological properties of silicon containing zinc–aluminum based journal bearings

Cited by 44 publications

References 17 publications

Influence of heat treatment on the wear resistance of the ZnAl40Cu1.5Ti1.5 alloy

Influence of heat treatment on the wear resistance of the ZnAl40Cu1.5Ti1.5 alloy

Effects of reheating temperature and time on microstructure and tensile properties of thixoformed in situ Si<SUB align="right">p/ZA27 composites

Study On Nanohardness Of Phases Occurring In ZnAl22Cu3 And ZnAl40Cu3 Alloys

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