A comparative study of lubricated friction and wear behaviour of Al–25Zn–3Cu–3Si bearing alloy

Bican, Osman; Savaşkan, Temel

doi:10.1177/1350650114537473

Cited by 10 publications

(11 citation statements)

References 16 publications

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“…Al-25Zn-3Cu alaşımına silisyum katılarak elde edilen Al-25Zn-3Cu-3Si alaşımının içyapısının ise α, α+η, θ fazları ile birlikte ötektik ve primer silisyum parçacıklarından oluştuğu gözlenmiştir (Şekil 3.c). Ötektik silisyum parçacıklarının alaşım içerisinde primer silisyum parçacıklarına göre daha homojen bir dağılım sergilediği belirlenmiştir [37].…”

Section: şEkil 3 Alaşımların Içyapı Görüntüleri A) Al-25zn B) Al-25zn-3cu Ve C) Al-25zn-3cu-3siunclassified

Bakır ve Silisyum İlavelerinin Al-25Zn Alaşımının CVD Al2O3 Kaplamalı Takımlarla Tornalanmasında İşlenebilirliğe Etkisinin İncelenmesi

Bayraktar

Çamkerten

Salihoğlu

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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In this study, Al-25Zn-3Cu and Al-25Zn-3Cu-3Si alloys were obtained by adding Copper (Cu) and Silicon (Si) to Al-25Zn alloy using induction melting and permanent mold casting method. Microstructural and mechanical properties of alloys were determined. The internal structure of Al-25Zn consisted of α and η phases, while the internal structure of Al-25Zn-3Cu consisted of α, α + η and θ phases. In addition to these phases, eutectic and primary silicon particles were observed in the internal structure of Al-25Zn-3Cu-3Si. It was determined with the addition of Cu and Si that the hardness, yield and tensile strength of the alloy was increased and the breaking elongation was reduced. In addition, the machinability of these alloys in turning process was investigated experimentally and the effect of Cu and Si on machinability was revealed. As a result of cutting experiments, the highest cutting force was measured in Al-25Zn-3Cu-3Si alloy while the lowest cutting force was measured in Al-25Zn-3Cu alloy. The highest surface roughness value was measured in the Al-25Zn-3Cu-3Si alloy at all cutting speeds, while the lowest was in the Al-25Zn alloy. Figure A. Experimental setupPurpose: In this study, it was aimed to investigate the effect of Cu and Si on the machinability properties of Al-25Zn alloy.Theory and Methods: Firstly, microstructural and mechanical properties of alloys were determined by optical microscope and universal test methods, respectively. Cutting force and roughness values were measured with the Kistler dynamometer and surface roughness measuring device, respectively. The cutting performance of CVD-Al2O3 inserts was evaluated by imaging the adhesion formed at the insert with SEM (Scanning Electron Microscope).Results: The addition of Cu and Si to the Al-25Zn alloy increased the hardness, yield and tensile strength of the alloy, while reducing the breaking elongation. Si element was been found to worsen the machinability properties of alloy, but copper improved. Conclusion:In this study, the effect of Cu and Si on microstructural, mechanical and machinability properties of Al25-Zn alloy was presented. The results show that Cu and Si have a significant effect on the microstructural and mechanical properties and cutting performance of the alloy.

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Section: şEkil 3 Alaşımların Içyapı Görüntüleri A) Al-25zn B) Al-25zn-3cu Ve C) Al-25zn-3cu-3siunclassified

Bakır ve Silisyum İlavelerinin Al-25Zn Alaşımının CVD Al2O3 Kaplamalı Takımlarla Tornalanmasında İşlenebilirliğe Etkisinin İncelenmesi

Bayraktar

Çamkerten

Salihoğlu

2020

Gazi Üniversitesi Fen Bilimleri Dergisi Part C: Tasarım Ve Teknoloji

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“…However, these alloys suffer from some drawback like dimensional instability, small impact strength and ductility and poor performance at elevated temperature limits application of these alloys [5,8,28]. These drawbacks are reduced to certain extent by increasing share of aluminum as compared with zinc in alloy [10][11][12][13][14][15][16][17]. Aluminium alloys with 19 to 27 wt.% zinc are beneficial bearing alloy and used for different vehicle parts that demands self-lubrications and wear resistance [11][12].…”

Section: Introductionmentioning

confidence: 99%

“…These alloys have outstanding fatigue strength and hence used for sliding bearing situations [13]. Al-25Zn, Al-25Zn-3Cu, Al40Zn3Cu2.5Si and Al40Zn3Cu shown better ductility, strength, hardness and wear resistance that of ZA alloy, SAE 65 bronze and bearing bronze [9,10,[13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Study of Mechanical and Sliding Wear Behavior of Al-25Zn alloy/SiC/Graphite Novel Hybrid Composites for Plain Bearing Application

Ritapure¹,

Kharde²

2019

Tribol. Ind.

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In this investigations, sliding wear performance of Al-25Zn based novel hybrid composites added with fixed weight percentage of graphite (3 wt.%) and varying weight percentage of silicon carbide (10, 20 and 30 wt.%) was investigated for various process factors such as specimen temperature, applied load, sliding speed and sliding distance using a pin on disc with EN24 disc as per Taguchi L16 array. For similar test conditions, the composite with 10 wt.% of silicon carbide shows the highest wear resistance and tensile strength; whereas the composite with 20 wt.% of SiC shows highest hardness. The specimen temperature is recognized as the dominating parameter for the sliding wear performance of the materials. Artificial Neural network and Regression model developed was found competent for the forecasting of wear performance. Confirmation experiment conducted with the optimum parameter combination also confirmed the accuracy of developed model. The observed wear mechanism is abrasion and adhesion. The major mechanisms of abrasive wear are recognized as ploughing, micro cutting and delamination.

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“…Aluminum alloy materials offer a potential for widespread applications in the automotive industry because of its lightweight. [1][2][3][4][5] Several investigations have been conducted on the wear resistances of Al-Si alloy. [6][7][8] Chen et al 9 detailed the wear resistance of Al-Si alloys subjected to boundary-lubricated contact during pin-on-disk tests.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface chemical etching on the lubricated reciprocating wear of honed Al–Si alloy

Shen

et al. 2017

Proceedings of the Institution of Mechanical Engineers, Part J:

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To improve the wear resistance of the honed Al-Si alloy cylinder liner, the chemical etching was applied on the surface of the Al-Si alloy samples. The effect of the etching time on the wear behaviors of the etched surface was investigated using an in-house designed reciprocating wear machine with oil lubrication. Meanwhile, the tribological properties were related to the changes in the surface morphology of the Al-Si alloy samples before and after the wear tests to analyze the associated underlying wear mechanisms. Results show that 5% NaOH solution is an effective chemical agent to etch the surface of Al-Si alloy samples. The 2 min etched Al-Si alloy samples exhibits low friction coefficient and small weight loss, indicating a good wear behavior of the properly etched surface. The insufficiently etched surface was found when the etching time was less than 2 min. Rare silicon particles are exposed due to the little removal of the aluminum on the surface, such that aluminum will be in direct contact with the piston ring during friction, causing adhesive wear. In contrast, overetching leads to the even more seriously worn out surface as observed in the samples etched for more than 3 min. The silicon particles tends to debond from the matrix with the increase of etching depth, then serve as the abrasive grains in the friction, resulting in the considerable increase of the friction coefficient and weight loss.

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A comparative study of lubricated friction and wear behaviour of Al–25Zn–3Cu–3Si bearing alloy

Cited by 10 publications

References 16 publications

Bakır ve Silisyum İlavelerinin Al-25Zn Alaşımının CVD Al2O3 Kaplamalı Takımlarla Tornalanmasında İşlenebilirliğe Etkisinin İncelenmesi

Bakır ve Silisyum İlavelerinin Al-25Zn Alaşımının CVD Al2O3 Kaplamalı Takımlarla Tornalanmasında İşlenebilirliğe Etkisinin İncelenmesi

Study of Mechanical and Sliding Wear Behavior of Al-25Zn alloy/SiC/Graphite Novel Hybrid Composites for Plain Bearing Application

Effect of surface chemical etching on the lubricated reciprocating wear of honed Al–Si alloy

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