Abstract:Abstract:In this study, the effects of in situ TiAl 3 particles on dry sliding wear behavior of A356 aluminum alloy (added Ti) composites were investigated. The wear samples were prepared by adding different amounts of Ti (4%, 6%, and 8%) into A356 powder alloy by mechanical alloying. The mechanically alloyed powders were cold pressed at 600 MPa and sintered 530˝C for 1 h in argon atmosphere and cooled in the furnace. After the sintering process, the samples were characterized. The results show that AlTi and T… Show more
“…In addition, in situ Al 4 C 3 compounds in the structure contribute to the hardness of the AMC material. This is also reported in some previous studies (Çam et al , 2016; Chu et al , 2012). Density results in Figure 2(b) show that the relative density and measured density results as a function of reinforcement amount added to the matrix.…”
Section: Resultssupporting
confidence: 91%
“…Operating conditions such as load, temperature and sliding speed are other important factors to consider (Muratoglu and Aksoy, 2000). Previous studies mainly seem to deal with the room temperature wear performances of AMCs (Özyürek and Tekeli, 2010; Çam et al , 2016; Özyürek et al , 2015). In this study, AMC materials were produced via the mechanical alloying method.…”
Purpose
The purpose of this study, the tribological behaviors at different temperatures of aluminium matrix composites (AMCs) with different amounts of ZrO2 added were investigated.
Design/methodology/approach
Aluminium graphite (A356/2 wt% graphite (solid lubricant)) composite powders prepared by adding four different amounts (3 wt%, 6 wt%, 9 wt% and 12 wt%) of Zirconia (ZrO2) to the matrix were mechanically alloyed for 4 h. Wear tests were conducted at five different temperatures (20 °C, 100 °C, 180 °C, 260 °C and 340 °C) and for three different sliding distances (53 m, 72 m and 94 m) on the pin-on-disc type wear tester.
Findings
Results of the study showed that the highest hardness and density value were measured for 12% ZrO2 added AMC material. Wear test results showed that weight loss increases with increasing temperature; weight loss decreases at all temperatures with the increasing amount of reinforcement in the matrix.
Originality/value
In this paper, the tribological properties of aluminium matrix composites produced by the mechanical alloying method by adding different amounts of ZrO2 were determined by simulating the tribological properties at different loads and temperatures.
“…In addition, in situ Al 4 C 3 compounds in the structure contribute to the hardness of the AMC material. This is also reported in some previous studies (Çam et al , 2016; Chu et al , 2012). Density results in Figure 2(b) show that the relative density and measured density results as a function of reinforcement amount added to the matrix.…”
Section: Resultssupporting
confidence: 91%
“…Operating conditions such as load, temperature and sliding speed are other important factors to consider (Muratoglu and Aksoy, 2000). Previous studies mainly seem to deal with the room temperature wear performances of AMCs (Özyürek and Tekeli, 2010; Çam et al , 2016; Özyürek et al , 2015). In this study, AMC materials were produced via the mechanical alloying method.…”
Purpose
The purpose of this study, the tribological behaviors at different temperatures of aluminium matrix composites (AMCs) with different amounts of ZrO2 added were investigated.
Design/methodology/approach
Aluminium graphite (A356/2 wt% graphite (solid lubricant)) composite powders prepared by adding four different amounts (3 wt%, 6 wt%, 9 wt% and 12 wt%) of Zirconia (ZrO2) to the matrix were mechanically alloyed for 4 h. Wear tests were conducted at five different temperatures (20 °C, 100 °C, 180 °C, 260 °C and 340 °C) and for three different sliding distances (53 m, 72 m and 94 m) on the pin-on-disc type wear tester.
Findings
Results of the study showed that the highest hardness and density value were measured for 12% ZrO2 added AMC material. Wear test results showed that weight loss increases with increasing temperature; weight loss decreases at all temperatures with the increasing amount of reinforcement in the matrix.
Originality/value
In this paper, the tribological properties of aluminium matrix composites produced by the mechanical alloying method by adding different amounts of ZrO2 were determined by simulating the tribological properties at different loads and temperatures.
“…4 shows that least weight loss occurs in the composite containing 20 wt% reinforcement, while the highest weight loss is observed for the unreinforced Al-7Si-0.3Mg alloy. This is similar to the results of Çam et al [14] Fig. 3 Variation of wear rate with percentage reinforcement of melon shell ash particules in Al-7Si-0.3Mg at different applied loads.…”
The present study examined wear characteristics of A356/melon shell ash particulate composites. Dry-sliding the stainless steel ball against specimen disc revealed the abrasive wear behavior of the composites under loads of 2 and 5N. The composite showed lower wear rate of 2.182 × 10−4 mm3/Nm at 20 wt% reinforced material under load of 5N. Results showed that wear rate decreased significantly with increasing weight percentage of melon shell ash particles. Microstructural analyses of worn surfaces of the composites reveal evidence of plastic deformation of matrix phase. The wear resistance of A356 increased considerably with percentage reinforcement. In other words, the abrasive mass loss decreased with increasing percentage of reinforcement addition at the both applied loads. The control sample suffered a highest mass loss at 5 N applied load.
“…However, relatively low wear resistance of aluminium and its alloys despite good mechanical properties restricts the use of these alloys in some tribological applications. The aluminium matrix composites (AMCs) display better wear performance when compared to aluminium alloys [3][4][5]. AMCs are manufactured with the continuous addition of fibre, short fibre and particle reinforcements.…”
Due to the many advantages it provides metal matrix composite materials, it is used as a publication in many industrial applications, especially in the automotive industry. Therefore, it is necessary to know the properties of these materials such as mechanical, tribological and corrosion. In this study, the effect of different sliding speeds was investigated on wear behavior of aluminum matrix composite materials produced by adding different amounts of ZrO2 by mechanical alloying method. 4 different amounts (3%, 6%, 9% and 12%) ZrO2 were added to the aluminum 2% graphite matrix. Composite powders mechanically alloyed for 60 minutes, were produced green compact samples by cold pressed with a pressure of 700 MPa. The green compacts produced were sintered for 2 hours at 600 °C. The produced aluminum composites were characterized by microstructure, density and hardness measurements. Wear tests were carried out on a block onring type wear testing device, under 20 N load and three different sliding speed (0.2 ms-1 , 0.4 ms-1 and 0.6 ms-1) and three different sliding distances (53 m, 72 m and 94 m). As a result of the studies, hardness and density values increased as the amount of ZrO2 in the matrix increased. Wear test results showed that weight loss decreased with increasing amount of reinforcement in the matrix.
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