Study of Mechanical and Wear Behaviour of Hyper-Eutectic Al-Si Automotive Alloy Through Fe, Ni and Cr Addition

The tribological performance of 5xxx series aluminum alloys with ternary zirconium is evaluated at ambient conditions under dry, wet and saline environment. The experiment has been done using a Pin-on-Disk apparatus under an applied load of 20N. The sliding distances varies ranging from 116m-2772m at a sliding velocity of 0.385 ms-1. The results show that presence of Mg and Zr into this alloy helps to increase their strength and wear resistance under dry sliding condition. But they significantly suffer under wet and corrosive environment due to formation of β-phase Al3Mg2, to slip bands and grain boundaries which may lead to and stress-corrosion cracking. The variation of friction coefficient is observed in wet and corrosive environment due to the formation of oxidation film, lubrication, and corrosion action in solution. The SEM fracture surface shows that brittle Al3Mg2 phase initiate the brittle fracture surface for Al-Mg alloy and Zr addition accelerate the brittleness of the alloy owing the fine precipitates of Al3Zr.

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“…Care has been given after each test to avoid entrapment of wear debris. The wear rate was calculated using the following expression [21]:…”

Section: Methodsmentioning

confidence: 99%

Role of magnesium and minor zirconium on the wear behavior of 5xxx series aluminum alloys under different environments

Kaiser

Matin

Shorowordi

2020

Journal of Mechanical and Energy Engineering

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“…It is also studied that additions of minor alloying elements such as Cu and Mg also make better the mechanical properties and make the alloy responsive to heat treatment [7]. In addition, the effect of Fe, Ni and Cr addition on the wear charcteristic of hyper-eutectic AlSi automotive alloy has been investigated [8]. Melt spinning process was introduced to study the rapid quenching process of Silumine with compositions in the range 0 at.…”

Section: Introductionmentioning

confidence: 99%

Lattice Dynamic and Thermophysical Properties of AlSi (Silumine) Alloy: A DFT Study

Suthar¹,

Pandya²,

Mevada³

et al. 2021

J. Nano- Electron. Phys.

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The present paper reports a comprehensive first-principles calculation of the structural, electronic and thermophysical properties of B1, B2 and B3 phases of AlSi (Silumine) alloy using plane-wave pseudopotential density functional theory (DFT). PAW type pseudopotential with the exchange correlation of Perdew-Burke-Ernzerhof (PBE) are used to compute properties of B1, B2 and B3 phases of AlSi alloy. Our computed equilibrium lattice constants are in excellent agreement with the reported results. To investigate the structural phase transitions beween different phases of AlSi alloy, volume dependence of energy and pressure dependence of enthaply are studied for B1, B2 and B3 phases of AlSi alloy. Further, the electronic band structure along with the total electronic density of states of B1, B2 and B3 phases of AlSi alloy are calculated at the ground states. Behaviour of the total electronic density of states of B1, B2 and B3 phases of AlSi is also studied with the increase in pressure up to 100 GPa. In addition, various finite temperature/pressure thermophysical properties such as the room temperature thermal equation of state, isothermal bulk modulus, coefficient of thermal expansion, heat capacity at constant volume and pressure, Debye temperature and Grüneisen parameter are computed for B1, B2 and B3 phases of AlSi alloy using quasi harmonic Debye model. Conclusions based on the structural, electronic and thermophysical properties of B1, B2 and B3 phases of AlSi alloy are summarized.

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“…The α-Al(Fe,Mn)Si phase exhibits a body centered cubic structure and its preferred morphology is Chinese script. Kaisera, et al [12] presented the applications of this type of alloys. Hypereutectic aluminium-silicon alloys are used in applications that require high resistance to wear, corrosion, good mechanical properties, low thermal expansion and reduced density.…”

Section: Introductionmentioning

confidence: 99%

“…Kaiser, et al [12] studied mechanical and wear behavior of hyper-eutectic Al-Si automotive alloy through Fe, Ni and Cr Addition, they observed that Fe improves the hardness of the hypereutectic Al-Si automotive alloys due to formation of hard β-Al 5 FeSi phase, beside; Ni extends the hardness due to precipitation of Ni intermetallic into the aluminum matrix. The Fe bearing intermetallic ensues as stress raisers and points of weakness that reduce the tensile strength and ductility of the alloy, likewise, the addition of Cr change in their effectiveness to modify the harmful harder phase to α-Al(Fe,Cr)Si.…”

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Effects of the Aluminum Alloy with Intermetallic a Phase on the Microstructural and Corrosion Resistance

Meza¹

2021

Int J Robot Eng

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The aluminum alloy with intermetallic α-Al 15 (Fe,Mn,Cr) 4 Si 2 phase with polygonal morphology, denoted by Al-α alloy was processed by controlled solidification and this alloy was studied in order to evaluate the microstructure, microhardness, corrosion resistance and electrochemical impedance when this alloy was immersed in an electrolytic medium at 0.1 mol/L solution of sulfuric acid.The intermetallic α-Al 15 (Fe,Mn,Cr) 4 Si 2 with polyhedron morphology presents a microhardness of 483 HV and being much higher than pure aluminum. The polarization resistance of the pure Al is much higher than Al-α alloy and the corrosion rate in pure Al is low, however, the corrosion rate in Al-α alloy is moderate. The Al-α alloy electrode presents a larger area of the voltammogram than the pure Al electrode and pure Al presents a larger region passivity, however, through Nyquist diagram, both samples presented the capacitive semicircle and inductance region. Being so, the polarization resistance was a lot bigger in pure Al than the Al-α alloy, and these results were similar to result of micro polarization. This alloy is suitable for use in many automotive applications increasing lifetime of its components, due to, it has low density, high microhardness and in sulfuric acid medium has noble behavior and presents a good corrosion resistance, and a low corrosion rate.

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Study of Mechanical and Wear Behaviour of Hyper-Eutectic Al-Si Automotive Alloy Through Fe, Ni and Cr Addition

Cited by 38 publications

References 33 publications

Role of magnesium and minor zirconium on the wear behavior of 5xxx series aluminum alloys under different environments

Role of magnesium and minor zirconium on the wear behavior of 5xxx series aluminum alloys under different environments

Lattice Dynamic and Thermophysical Properties of AlSi (Silumine) Alloy: A DFT Study

Effects of the Aluminum Alloy with Intermetallic a Phase on the Microstructural and Corrosion Resistance

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