Effects of modifying the hypoeutectic AlMg5Si2Mn alloy via addition of Al10Sr and/or Al5TiB

Snopiński, Przemysław; Król, M.; Wróbel, T.; Matus, Krzysztof; Woźniak, Anna; Tański, Tomasz; Palček, Peter

doi:10.1007/s43452-020-00147-6

Cited by 8 publications

(2 citation statements)

References 49 publications

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“…Among the different series of aluminum alloys, the role of the 5xxx series with magnesium as the main alloying element is vital. The aluminum–magnesium alloys are a potential candidate for many structural applications in the automotive industry because of their reasonable strength, high corrosion resistance, low alloying content and single-phase structure (free of precipitates) [ 11 , 12 , 13 , 14 , 15 ] However, the most serious deficiency of the Al–Mg alloys with the Mg content ≥ 3 wt% is poor technological plasticity. Therefore, to date, many studies have been conducted to increase the formability of the Al–Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

et al. 2021

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To date, numerous investigations have shown the beneficial effect of ultrasonic vibration-assisted forming technology due to its influence on the forming load, flow stress, friction condition reduction and the increase of the metal forming limit. Although the immediate occurring force and mean stress reduction are known phenomena, the underlying effects of ultrasonic-based material softening remain an object of current research. Therefore, in this article, we investigate the effect of upsetting with and without the ultrasonic vibrations (USV) on the evolution of the microstructure, stress relaxation and hardness of the AlMg3 aluminum alloy. To understand the process physics, after the UAC (ultrasonic assisted compression), the microstructures of the samples were analyzed by light and electron microscopy, including the orientation imaging via electron backscatter diffraction. According to the test result, it is found that ultrasonic vibration can reduce flow stress during the ultrasonic-assisted compression (UAC) process for the investigated aluminum–magnesium alloy due to the acoustic softening effect. By comparing the microstructures of samples compressed with and without simultaneous application of ultrasonic vibrations, the enhanced shear banding and grain rotation were found to be responsible for grain refinement enhancement. The coupled action of the ultrasonic vibrations and plastic deformation decreased the grains of AlMg3 alloy from ~270 μm to ~1.52 μm, which has resulted in a hardness enhancement of UAC processed sample to about 117 HV.

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Section: Introductionmentioning

confidence: 99%

Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

et al. 2021

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“…Al-Mg alloys are widely used due an attractive combination of good weldability, ductility, toughness, formability and high levels of corrosion resistance [1] [2] [3]. However, these alloys, in their annealed condition, exhibit low yield strength (YS), ranging from 90 to 160 MPa, depending on the Mg content [4] [5].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Hardness of AlMg3 Alloy Subjected to Ultrasonic Upsetting

Snopiński

2021

SSP

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This study was conducted to study the effect ultrasonic vibrations on the evolution of the microstructure and hardness of the AlMg3 aluminum alloy in a solution treated condition. To understand the process physics in this article, after the deformation the microstructures of the samples before and after deformation were analyzed by the light and electron microscopy, including the electron backscatter diffraction (EBSD) analysis. The result evidently shows that the ultrasonic-assisted deformation has a meaningful influence on the grain refinement – the application of the USV enhances the formation of deformation bands and new sub-grains. This resulted in a certain hardness enhancement.

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The Effect of Zr and Li on the Microstructure of AlMg5Si2Mn-Type Casting Alloys

Boyko,

Mykhalenkov,

Springer

et al. 2024

Inter Metalcast

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In the article, the authors present results of microstructural studies of Al-Mg-Si-Mn casting alloys with Zr, Li, and TiB2 additions on a broad scale. Zirconium content was set on two levels: 0.34 and 1.58 wt%, and Li was set 1.2 and 2.0 wt%. It was found that the addition of Zr shifts the eutectic melting temperature to a higher level, up to 611.3 °C at 1.6 wt% Zr. At the same time, Li addition leads to the depression of eutectic melting temperature: down to 587.2 °C at 2.0 wt% Li, what is a common effect of eutectic modification which was confirmed by means of structural examinations. The complex addition of Li and AlTi5B1 resulted in a eutectic melting temperature close to the equilibrium eutectic temperature for the Al-Mg-Si system (596.2 °C). The grain refinement effect of Zr is due to the nucleation of α-Al on the Zr(Al1−x, Six)3 phase. Crystals of this phase were detected in the grain centers of Zr-containing alloys. The Li addition does not affect α-Al grain size but changes the morphology of eutectic colonies from petal-like to fibrous. Observation of TiB2 particles inside the primary Mg2Si crystals gives direct experimental confirmation of nucleation of the primary phase on the surface of TiB2 in the alloy after adding Li and AlTi5B1. Natural aging of the alloys resulted in the formation of fine precipitates detected close to dislocations. The most apparent supposition is that the mechanism responsible for their formation is heterogeneous nucleation in the stress field of dislocations. Hardness tests showed adding 2.0 wt% of Li is very effective, increasing hardness up to 113 HV0.2 in naturally aged condition, which is nearly double that of commercial Al-Mg-Si die-casting alloy. Several effects were proposed which may synergistically contribute to the rise of hardness in Li-containing alloys, such as solid solution strengthening, formation of primary LiAlSi phase and natural aging.

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Effects of modifying the hypoeutectic AlMg5Si2Mn alloy via addition of Al10Sr and/or Al5TiB

Cited by 8 publications

References 49 publications

Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

Ultrasound Effect on the Microstructure and Hardness of AlMg3 Alloy under Upsetting

Microstructure and Hardness of AlMg3 Alloy Subjected to Ultrasonic Upsetting

The Effect of Zr and Li on the Microstructure of AlMg5Si2Mn-Type Casting Alloys

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