Permanent Mold Gravity Casting Cylinder Block with Hypereutectic Aluminum Liners

Crivellone, G.; Fuganti, A.; Mus, C.; Salinas, Daniel

doi:10.4271/2001-01-0402

Cited by 4 publications

(4 citation statements)

References 2 publications

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“…Similarly to powders production by atomisation, the spray forming involves the atomisation of metals and the deposition of droplets in a substrate, leading to the formation of a preform. The advantages of spray formed alloys have been extensively documented in the literature [4,5]. However, researches on the corrosion behaviour of these alloys are still very scarce.…”

Section: Introductionmentioning

confidence: 99%

The Corrosion Behaviour of a Hypereutectic Al-Si Alloy Obtained by Spray Forming in Acid, Neutral and Alkaline Solutions

Santos

Kunioshi

Rossi

et al. 2006

MSF

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Al-Si hypereutectic alloys produced by spray forming represent an important technological development for application in the aeronautical and automotive industries. Due to some special properties these alloys find application as cylinder liners, mainly due to their high strength and wear resistance. Much research has been carried out to evaluate the mechanical properties of these alloys but the literature on their corrosion performance is still very scarce. In this study, the corrosion behaviour of a spray formed Al-Si-Cu hypereutectic alloy was investigated by electrochemical impedance spectroscopy (EIS) in acid (pH 3.3), neutral (pH 7) and alkaline (pH 11) solutions. Intense localized attack occurred in the acid electrolyte and the impedance decreased with time of immersion. In the neutral medium, the alloy was passivated but localized attack also occurred on weak areas of the passive film. In the alkaline medium, precipitation of corrosion products occurred during the first hours of immersion causing the increase of impedance but thickening of this layer led to cracks growth with time and, consequently, to the exposure of metallic substrate, resulting in the decrease in impedance for longer periods.

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Section: Introductionmentioning

confidence: 99%

The Corrosion Behaviour of a Hypereutectic Al-Si Alloy Obtained by Spray Forming in Acid, Neutral and Alkaline Solutions

Santos

Kunioshi

Rossi

et al. 2006

MSF

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“…Applications of the Al-Si alloys in the automotive industry, include engine blocks and parts of engines, particularly, cylinder liners. The main advantages for the use of these alloys are weight reduction, low fuel consumption and less emission of pollutants 1,2 . The use of engine blocks made of hypereutectic aluminium alloys has been considered by many world manufacturers.…”

Section: Introductionmentioning

confidence: 99%

“…Due to such properties, these alloys have been used in several applications from the automotive to aerospace and power industries [1][2][3][4] . The outstanding wear resistance is due to the high volumetric fraction of the silicon phase and intermetallics.…”

Section: Introductionmentioning

confidence: 99%

“…The accepted solution is to use cylinder liners made of cast irons; cast or spray formed high silicon aluminium alloys, composites or coatings in this area 2 . Hypereutectic alloys can be produced by ingot metallurgy 1,2 or by rapid solidification processes, such as melt spinning 4 , atomisation 4,5 and spray forming [4][5][6][7][8][9] . The use of casting for the production of these alloys is limited by the range of possible chemical compositions.…”

Section: Introductionmentioning

confidence: 99%

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Crystallographic orientation-spray formed hypereutectic aluminium-silicon alloys

et al. 2005

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Aluminium-silicon alloys have been wide accepted in the automotive, electric and aerospace industries. Preferred orientation is a very common condition for metals and alloys. Particularly, aluminium induces texture during the forming process. The preparation of an aggregate with completely random crystal orientation is a difficult task. The present work was undertaken to analyse the texture by X-ray diffraction techniques, of three spray formed hypereutectic Al-Si alloys. Samples were taken from a billet of an experimental alloy (alloy 1) and were subsequently hot-rolled and cold-rolled (height reduction), 72% and 70%, respectively. The other used samples, alloys 2 and 3, were taken from cylinders liners. The results from the Laue camera showed texture just in the axial direction of alloy 3. The pole figures also indicated the presence of a typical low intensity deformation texture, especially for alloy 3. The spray formed microstructure, which is very fine, hinders the Al-Si texture formation during mechanical work.

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Mechanical and Microstructural Characterisation of Cylinder Liners

Santos

Costa

Rossi

2003

MSF

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Permanent Mold Gravity Casting Cylinder Block with Hypereutectic Aluminum Liners

Cited by 4 publications

References 2 publications

The Corrosion Behaviour of a Hypereutectic Al-Si Alloy Obtained by Spray Forming in Acid, Neutral and Alkaline Solutions

The Corrosion Behaviour of a Hypereutectic Al-Si Alloy Obtained by Spray Forming in Acid, Neutral and Alkaline Solutions

Crystallographic orientation-spray formed hypereutectic aluminium-silicon alloys

Mechanical and Microstructural Characterisation of Cylinder Liners

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