Dry sliding wear behaviour of powder metallurgy Al–Mg–Si alloy-MoSi2 composites and the relationship with the microstructure

Corrochano, Javier; Walker, J. C. F.; Lieblich, Marcela; Ibáñez, Joaquı́n; Rainforth, W. M.

doi:10.1016/j.wear.2011.01.029

Cited by 54 publications

(13 citation statements)

References 42 publications

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“…Moreover, at any given sliding distance, weight loss increases with applied load. Similar trend is also observed for other conditions, which is in agreement with other researchers [40][41][42][43][44][45][46][47][48][49][50][51][52]. The wear rate was calculated from the slope of the weight loss versus sliding distance.…”

Section: Wear Behaviorsupporting

confidence: 90%

Reciprocating Wear Behavior of Al Alloys: Effect of Porosity and Normal Load

Sinha¹,

Islam²,

Farhat³

2015

Int J Metall Mater Eng

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Aluminum alloys are attractive for critical applications such as pistons, clutch housings and liners in automotive industry for their high strength to weight ratio, high corrosion resistance and good heat conductivity. These alloys can be fabricated using casting and powder metallurgy techniques in which porosity is a common feature. The presences of pores adversely affect the mechanical properties and wear resistance of these components. Not only the total area percentage of porosity influences the degradation in properties but also size, shape and interconnectivity of pores play an important role. In this study, aluminum alloys were produced using powder metallurgy technique. The amount of porosity was varied by varying compaction pressure and amount of wax added before compaction. Reciprocating wear tests (ball-on-flat configuration) were performed against AISI 52100 bearing steel ball under both low (1.5-5N) and high (6-20N) loads. Scanning electron microscopy was employed in order to identify possible wear mechanisms. Both detrimental and beneficial effects of porosity under different loading conditions were observed. An attempt has been made to develop a relationship between pore size and distribution and wear behavior of aluminum alloys.

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Section: Wear Behaviorsupporting

confidence: 90%

Reciprocating Wear Behavior of Al Alloys: Effect of Porosity and Normal Load

Sinha¹,

Islam²,

Farhat³

2015

Int J Metall Mater Eng

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“…It was reported by several researchers that the incorporation of hard ceramic particles such as SiC, Al 2 O 3 , TiC, B 4 C, TiB 2 , and zirconium carbide (ZrC) into aluminium alloys will enrich the wear resistance. These particles can be used in micron and nano scales [5]. Among these ceramic particles, nano-ZrC has a high modulus, enhanced hardness and high wear resistance.…”

Section: Introductionmentioning

confidence: 99%

Tribological behavior, mechanical properties and microstructure of Al-12Si-ZrC composite prepared by powder metallurgy

John¹,

Paul²,

Singh³

et al. 2017

Bulletin of the Polish Academy of Sciences Technical Sciences

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Abstract. High-energy mechanical alloying method was used to prepare Al-12Si-xZrC (x = 0, 5, 10, 15 wt. %) nanocomposites. Cylindrical preforms were prepared with an initial preform density of 89% by using a suitable die and punch assembly. The preforms were sintered in a muffle furnace with an inert gas atmosphere at a temperature of 550°C, followed by cooling until room temperature has been attained. Scanning electron microscope (SEM) and X-ray diffraction (XRD) techniques were used to characterize the composites. Pin-on-disc wear testing machine was used to determine the tribological properties of the prepared composites. The results show that the wear loss reduced with increasing the reinforcement content and coefficient of friction increases gradually. Normally, solid state methods are used to produce composites with high mechanical properties, because these methods deliver a uniform distribution of reinforcing phase particle in the matrix material [6][7][8][9][10]. Some trials were conducted to fabricate Al-12Si-xZrC nanocomposites using different techniques, but the mechanical alloying method is a suitable technique to fabricate Al-12Si-xZrC nanocomposites. No attempt has been made to fabricate Al matrix composites reinforced with ZrC particles using the P/M method. In this present paper, an effort is made to study the outcome of wear behavior of Al-12Si-xZrC nanocomposites prepared with the mechanical alloying method. These composites were characterized using SEM and XRD. The wear behavior was calculated using the weight loss method. The worn surfaces and wear debris were characterized using SEM. Experimental procedure2.1. Materials. Aluminium and silicon with 99.5% purity and particle size of 44 µm were purchased from Metal Powder Company Limited, Thirumangalam, Tamilnadu, India, and the ZrC powder with a high, 99.9% purity and particle size of 400 nm was purchased from US Research Nanomaterials, Inc., USA. The individual powders were pulverized and mixed in a high-energy ball mill with ball-to-powder weight ratio of 20:1. The milling was done at a constant speed of 300 rpm in a wet medium with a presence of toluene to avoid oxidation and agglomeration. Scanning electron microscope images were used for the analysis of mixed powder particles. Fig. 1 shows the received powders of aluminium, silicon, and zirconium carbide. From the SEM images, it can be visualized that aluminium was spherical in shape, silicon was flattened and nano-zirconium carbide had a cubic crystal shape.

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“…That is because homogenisation increases in material structure as the ratio of extrusion increases [33,37,38]. It is likely to say that the ability of re-crystallisation increases as the rate of deformation increases in the materials by deforming materials at 350 • C above the re-crystallisation temperature for aluminium alloys [41].…”

Section: Resultsmentioning

confidence: 99%