Effect of Silicon on Microstructure and Mechanical Properties of Al-Si Piston Alloys

Mathai, Blesson; Mathew, Cijo; Pratheesh, K.; Varghese, Cibu K

doi:10.14445/22315381/ijett-v29p256

Cited by 6 publications

(5 citation statements)

References 1 publication

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“…The refinement of the eutectic Si phase by Sr can improve the tensile strength slightly (108-188.4 MPa) as compared with (102-178 MPa) for non-modified alloy when the silicon content varies between 3.39 and 13.45%. This result is good agreement with the data published in elsewhere [2]. In addition, the hardness of the produced Al-Si alloys increases with increasing the dissolved silicon in these alloys.…”

Section: -2 Mechanical Propertiessupporting

confidence: 92%

“…Microstructure evolution of hypoeutectic Al-Si alloys during solidification is in two stages: primary dendrite Al-phase formation (α-matrix), and the subsequent eutectic transformation (eutectic Si particles in matrix) [2]. Al-Si alloys containing more than about 12% Si exhibit a hypereutectic microstructure normally containing primary silicon phase in a eutectic matrix.…”

Section: Introductionmentioning

confidence: 99%

“…Modification of the silicon particles in Al-Si alloys, by the transition from blocky, acicular and needle-like silicon phases to a fine fibrous silicon structure, improves the casting properties of these alloys [5]. Addition of strontium, antimony, sodium, barium, and calcium and rare earth elements is found to modify the coarse acicular morphology of Si into fibrous form [2]. Additions in the range of few 100 ppm from these modifiers promotes the eutectic Si morphology and have a beneficial effect on both strength and ductility [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Strontium Content on the Mechanical Properties of Hypo and Hyper Al-Si Cast Alloys

Omran

Ali

et al. 2018

Journal of Al-Azhar University Engineering Sector

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Al-Si alloys are the most important aluminium cast alloys because of their superior casting properties such as good castability, low specific gravity, low viscosity and high resistance to wear and corrosion. The effect of strontium (Sr) addition-as a modifier-on the microstructure, hardness and tensile strength properties of the Al-Si alloys at different silicon contents (3.4, 6.7, 9.3, 12.4, and 13.4 %) was investigated. Sr content in these groups ranged between 0.086 to 0.181 %. The nanohardnesss and maximum displacement for Al-Si alloys with different percentages of silicon (6.65, 9.14, 12.23 and 13.5 % respectively) at constant Sr (0.02%) were introduced and strain hardening was detected. The results indicated that the addition of Sr to Al-Si alloy modified the Al-Si morphology from large plates or needle-like silicon structure to fine-scale fibrous silicon structure and hence improved the tensile strength and hardness. The values of hardness and tensile strength of Al-13-14 Si % were increased from 64.5 to 72 BHN and from 154.8 to 172.4 MPa respectively with increasing the percentage of Sr from 0.086 to 0.17 %. The hardness percentage in nanoindentation measurements was increased by about 26%, while the maximum displacement was decreased from about 7400 nm to about 4930 nm when the Si % increasing from 6.65 to 13.5 %.

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Section: -2 Mechanical Propertiessupporting

confidence: 92%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Strontium Content on the Mechanical Properties of Hypo and Hyper Al-Si Cast Alloys

Omran

Ali

et al. 2018

Journal of Al-Azhar University Engineering Sector

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“…It was discovered that the rate of wear was higher in the aluminium alloy than in the mild steel as shown in Figures 3 and 5. Similarly it was established that the aluminium alloy encountered a higher stress and strain than the mild steel [13] and [14]. That was occasioned by it's relatively lightness of weight of the aluminium alloy.…”

Section: Discussionmentioning

confidence: 99%

Comparative analysis of abrasive wear between aluminium alloy and mild steel in a pin-on-disc tribological test

Aliemeke,

Akhigbe,

Dirisu

et al. 2023

Nig. J. Tech.

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A comparative analysis of the abrasive wear of aluminium alloy and mild steel on the pin-on-disc wear test machine has been successfully carried out. An investigation on the effects of wear, stress and strain on the aluminium alloy and the mild steel was conducted. The wear test carried out determined the difference between rate of wear of the aluminium alloy and the mild steel. The input parameters applied in determining the wear rate were time of wear, sliding distance, track diameter of the disc and mass difference before and after the experiment. The finite element analysis developed the stress and elastic strain distribution obtained on the application of 2 kg load (20 N) on the aluminium alloy and mild steel specimen. The equivalent (Von Mises) stress distribution in mild steel had a maximum stress value of 0.023625 Mpa and minimum stress of 1.444×10-5 Mpa while that of the aluminium alloy yielded a maximum and minimum stress of 0.0365 Mpa and 8.5×10-5 Mpa respectively. It was evident that the aluminium alloy recorded a higher magnitude of stress than the mild steel. This showed that the aluminium alloy being relatively light was more stressed than the mild steel. It was discovered that the rate of wear was higher in the aluminium alloy than in the mild steel.

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“…The study showed that the aluminium alloy exhibited very high ultimate yield strength of about 1300Mpa when compared to other aluminium alloy and composites. Mathai et al (2015) investigated the effect of alloying elements on the impact strength of Aluminium-silicon piston alloys. The needle shaped silicon in the structural matrix of Al-Si alloys exhibits improved mechanical properties when heat treated in the presence of various alloying elements.…”

Section: Introductionmentioning

confidence: 99%

Design and Fabrication of Impact Strength Machine

2021

JIEA

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The development of the impact strength testing machine is successfully presented. The impact strength testing machine is necessary for ascertaining the strength of metallic components in withstanding applied load. A comprehensive design analysis was carried out to ascertain the various component sizes of the Impact strength testing machine in order to create a path for precise construction. Majority of the materials used in this fabrication were obtained locally. The constructed machine yielded a maximum velocity of 4.9m/s on execution of Charpy and Izod impact test. Great stability was achieved as a result of thick base plate and column support used during construction. A crushing force of 68.05KN and an impactor head energy of about 35J was able to impart the requisite deformation on the metallic specimen needed for the Charpy and Izod tests.

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Effect of Silicon on Microstructure and Mechanical Properties of Al-Si Piston Alloys

Cited by 6 publications

References 1 publication

Effect of Strontium Content on the Mechanical Properties of Hypo and Hyper Al-Si Cast Alloys

Effect of Strontium Content on the Mechanical Properties of Hypo and Hyper Al-Si Cast Alloys

Comparative analysis of abrasive wear between aluminium alloy and mild steel in a pin-on-disc tribological test

Design and Fabrication of Impact Strength Machine

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