Wear properties of high-pressure die cast and thixoformed aluminium alloys for connecting rod applications in compressors

Birol, Yücel; Birol, Feriha

doi:10.1016/j.wear.2007.12.004

Cited by 22 publications

(12 citation statements)

References 31 publications

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“…It is inferred from the performance of the thixoformed and heat treated alloys that the wear performance of the thixoformed Al-Si based alloys is governed by the size and distribution of coarse Si particles, and that the impact of hardness is only secondary. While heat treatment is reported to affect the wear resistance of Al-Si alloys, often in a favorable way [12,15], no systematic effect of heat treatment was found on the wear properties of similar thixoformed alloys in recent studies [4,14].…”

Section: Methodsmentioning

confidence: 93%

“…Ward et al [14] reported a decrease in wear resistance with increasing Si in thixoformed alloys and blamed the difficulty of thixoforming high Si alloys for their inferior wear properties. It should be noted, however, that the HPDC grade of the near-eutectic alloy (alloy 2) wears nearly 3 times more under the same conditions [4], implying that thixoforming is a viable alternative as the manufacturing route. The features of the worn surfaces are fully consistent with the specific wear rate measurements (Fig.…”

Section: Methodsmentioning

confidence: 99%

“…Furthermore, the die filling process in thixoforming can be controlled to eliminate porosity, thanks to the high viscosity of semisolid alloys. Wear properties of AlSiCuFe alloys produced by high pressure die casting and thixoforming were recently investigated by the authors [4] and the performance of the latter was found to be encouraging. The present work was undertaken to identify the impact of Si content on the wear behaviourr of thixoformed AlSiCuFe alloys tested under conditions faced by connecting rods in compressors.…”

Section: Introductionmentioning

confidence: 99%

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Wear properties of thixoformed AlSiCuFe alloys

Birol

2008

Int J Mater Form

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Section: Methodsmentioning

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Wear properties of thixoformed AlSiCuFe alloys

Birol

2008

Int J Mater Form

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“…Birol et al stated that the enhanced wear performances of hypereutectic Al-Si alloys are linked to the uniform distribution of fine primary Si particles [106]. Thus, the combination of a favorable silicon dispersion and the better soundness induced by the semi-solid processing gives superior wear performance.…”

Section: Wear Resistancementioning

confidence: 99%

Microstructure and Properties of Semi-Solid Aluminum Alloys: A Literature Review

Pola

Tocci

Kapranos

2018

Metals

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Semi-solid processing of aluminum alloys is a well-known manufacturing technique able to combine high production rates with parts quality, resulting in high performance and reasonable component costs. The advantages offered by semi-solid processing are due to the shear thinning behavior of the thixotropic slurries during the mold filling. This is related to the microstructure of these slurries consisting of solid, nondendritic, near-globular primary particles surrounded by a liquid matrix. This paper presents a review on the formation of this nondendritic microstructure, reports on the different proposed mechanisms that might be responsible, and illustrates the relationship between microstructure and properties, in particular, tensility, fatigue, wear, and corrosion resistance.fraction. Unfortunately, all these tend to increase the production costs [8], even though recent investigations have shown that SSM processing is only slightly more expensive than conventional die-casting and cheaper than some other competing foundry processes [9].Since its development in the early 1970s at MIT [10], much research has been performed worldwide, aimed mainly at developing new and alternative routes of feedstock production for different alloys suitable for SSM processing. At present, there are a number of different techniques used to produce semi-solid castings, differentiated by the percentage of liquid/solid fraction they employ and the way they produce the alloy in the semi-solid state. SSM methods can be divided in two main categories according to their processing route, known as rheocasting and thixocasting [11]. In rheocasting, the semi-solid slurry is prepared in situ from the liquid state down to a certain percentage of solid fraction (usually between 10 and 30% [12]), and then directly transferred into the shot sleeve for being injected into the die. In thixocasting, a billet, characterized by an almost globular or rosette-like microstructure developed through some specific route, is reheated in the mushy zone (semi-solid region) to an appropriately chosen solid fraction (usually between 50% and 60% [13]), placed in a modified shot sleeve and finally injected into the die [14]. Another classification methodology distinguishes the SSM methods according to the initial step used for obtaining the semi-solid feedstock, i.e., from the liquid state, by controlled solidification or from the solid state, via heavy plastic deformation and recrystallization [11].Some of the most common routes for feedstock material preparation are: mechanical stirring, such as the SSR [15,16] or GISS [17] processes, electromagnetic stirring (EMS or MHD) [18,19], ultrasonic stirring (UTS) [20,21], New Rheocasting (NRC or UBE) [22,23], cooling slope [24], twin screw [25], Rheometal [26], liquid mixing method [27], SEED [28], thermomechanical [29], and SIMA [14,30].A number of interesting reviews about the different technologies available for obtaining nondendritic slurries can be found in the literature [11,13,14,[31][32][33]. Nevertheless, indep...

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“…It has the advantages of low thermal expansion coefficient, good wear resistance, high stiffness, and specific strength and is an ideal material for manufacturing high-performance automotive engine cylinders and pistons. [1][2][3][4] However, in the traditional casting process, silicon phases with sharp corners and large sizes are prone to appear in the microstructure of hypereutectic Al-Si alloy, thus cutting the matrix and easily producing cracks, which seriously limit the use of hypereutectic Al-Si alloy. [5] However, in a recent study, Nan Kang et al [6] prepared pereutectic Al-Si alloys by a selective laser melting process (a type of laser additive manufacturing [LAM] process), which have regular shapes and smaller sizes of primary silicon and exhibit higher wear resistance than conventionally cast samples.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Frictional Wear Behavior of Al–18Si–4Mg–2Mn–0.5Fe–xCu Alloys Fabricated by Laser Additive Manufacturing

Yang,

Wang,

Wang

et al. 2024

Adv Eng Mater

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The microstructure evolution, corrosion resistance, and wear resistance of Al‐18Si‐4Mg‐2Mn‐0.5Fe‐xCu (x= 0,1,2,3,4,5 wt.%) alloys prepared by laser additive manufacturing (LAM) process were studied. It is found that the addition of Cu not only produces Cu‐rich strengthened phase, but also promotes the precipitation of the second phase. With the addition of Cu, the corrosion resistance of the alloy decreases, which is due to the increase of potential difference caused by the increase of the strengthening phase. The addition of Cu can effectively inhibit corrosion cracking. The hardness and wear resistance of the alloy increased with the increase of Cu content under the synergistic strengthening of the Q‐Al5Cu2Mg8Si6 phase and Al2Cu phase. When the Cu content is 3wt.%, the hardness and wear resistance of the alloy are the best. However, with the increase of Cu content, part of the Q phase is transformed into the Al2Cu phase, and this synergistic strengthening effect is weakened, and the hardness and wear resistance of the alloy are reduced, but still higher than that of the alloy without Cu addition, which indicates that the addition of Cu can effectively improve the hardness and wear resistance of the alloy.This article is protected by copyright. All rights reserved.

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Wear properties of high-pressure die cast and thixoformed aluminium alloys for connecting rod applications in compressors

Cited by 22 publications

References 31 publications

Wear properties of thixoformed AlSiCuFe alloys

Wear properties of thixoformed AlSiCuFe alloys

Microstructure and Properties of Semi-Solid Aluminum Alloys: A Literature Review

Microstructure Evolution and Frictional Wear Behavior of Al–18Si–4Mg–2Mn–0.5Fe–xCu Alloys Fabricated by Laser Additive Manufacturing

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