High Cycle Fatigue Properties of near eutectic Al Si Piston Alloy

Krishnankutty, Pratheesh; Kanjirathinkal, Allesu; Joseph, M. A.; Ravi, M.

doi:10.1016/j.matpr.2017.11.535

Cited by 8 publications

(2 citation statements)

References 5 publications

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“…However, there is still a lack of clarity on the effect of wall-attached combustion on the thermal load of pistons. A classical steady-state thermal load analysis has been widely used in the analyses of thermal mechanical fatigue, such as the effects of strength and the deformation of aluminum silicon alloys through tensile and thermal cycling methods [22][23][24][25][26][27]. But in order to accurately predict the fluctuating thermal load due to rough combustion, it is necessary to carry out a transient temperature calculation for the piston at a small timescale coupled with the instant heat flux variation from in-cylinder gas calculated using the CFD method.…”

Section: Introductionmentioning

confidence: 99%

Thermal Load Analysis of Piston Damaged by Wall-Wetting Combustion in a Heavy-Duty Diesel Engine

Li,

et al. 2023

Sustainability

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Piston damage is a frequent problem of engine durability and plays an important role in an engine’s performance design. Recently, a large amount of piston erosion has occurred in a series of heavy-duty diesel engines. To investigate the reason for the piston erosion, a study of the computational fluid dynamics (CFD) of the combustion process in the cylinder and finite element analysis (FEA) of piston was carried out under different initial temperatures. The results show that when the initial temperature decreases from 380 K to 307 K, the mass of wall-wetting increases by 73%, and the maximum combustion pressure increases from 8.1 MPa to 11 MPa; when the initial temperature decreases from 350 K to 328 K, the highest temperature at the throat of the valve pocket increases by nearly 100 K, doubling the temperature fluctuation; and in the case of 328 K, areas exceeding 700 K are concentrated on the top surface of the piston, and the temperature gradient in the depth direction of the throat position decays rapidly.

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Section: Introductionmentioning

confidence: 99%

Thermal Load Analysis of Piston Damaged by Wall-Wetting Combustion in a Heavy-Duty Diesel Engine

Li,

et al. 2023

Sustainability

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“…Recent works have suggested the production of aluminum–FGM pistons by gravity casting [23,24,25,26] adopting a dual, functionally graded, composition: EN AC 48000 (AlSi12CuNiMg) in the piston crown ensuring mechanical strength and thermal resistance, and EN AC 42100 (AlSi7Mg0.3) in the piston skirt providing higher ductility. In fact, pistons are commonly made of Silumin alloy EN AC 48000 and are often subjected to fatigue cracking in the skirt because of the low alloy ductility [27,28,29]. Furthermore, in these alloys, the presence of Cu and Mg, either present in intermetallic phases or into the α–solid solution, can affect corrosion resistance.…”

Section: Introductionmentioning

confidence: 99%

Junction Characterization in a Functionally Graded Aluminum Part

et al. 2019

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Aluminum alloys are widely used to produce automotive components, thanks to their great mechanical properties–to–density ratio. Engine components such as pistons are conventionally produced by casting of Al–Si eutectic alloys (Silumin alloys) such as EN AC 48000. Due to the harsh working conditions and the lower ductility if compared to aluminum–silicon alloys with lower silicon content, pistons made of this alloy are prone to fatigue failures in the skirt region. In order to overcome such limits, the use of a Functionally Graded Material (FGM) in the production of a piston is proposed. The adoption of a functionally graded architecture can maximize the properties of the component in specific areas. A higher level of thermal resistance in the crown of the piston can be achieved with EN AC 48000 (AlSi12CuNiMg), while higher elongation at rupture in the skirt region would be conferred by an EN AC 42100 (AlSi9Mg0.3). The FGM properties are strictly related to the metallurgical bonding between the alloys as well as to the presence of intermetallic phases in the alloys junction. In the present article, the characterization of gravity casted FGM samples based on Al–Si alloys with respect to microstructure and mechanical testing is presented, with a specific focus on the characterization by impact testing of the joint between the two alloys.

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Current technologies for aluminum castings and their machinability

Bayraktar

Hekìmoğlu

2021

Advanced Welding and Deforming

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High Cycle Fatigue Properties of near eutectic Al Si Piston Alloy

Cited by 8 publications

References 5 publications

Thermal Load Analysis of Piston Damaged by Wall-Wetting Combustion in a Heavy-Duty Diesel Engine

Thermal Load Analysis of Piston Damaged by Wall-Wetting Combustion in a Heavy-Duty Diesel Engine

Junction Characterization in a Functionally Graded Aluminum Part

Current technologies for aluminum castings and their machinability

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