Effects of melt thermal rate treatment and modification of P and RE on hypereutectic Al–Si–Cu–Mg alloy

Wang, Q. L.; Geng, Haoran; Zuo, Min; Long, Fang; Peng, Xiujing

doi:10.1179/1743284713y.0000000267

Cited by 21 publications

(5 citation statements)

References 23 publications

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“…1 The aluminium alloys have thus been increasingly used in automotive and aerospace industries because of their high strength to weight ratio, better physical and mechanical properties, higher castability and corrosion resistance. 2,3 Most alloys within 3xx Al-Si series, such as Al-Si-Cu or Al-Si-Cu-Mg, are age hardenable and their microstructure consists of the a-Al dendritic matrix, eutectic silicon and intermetallics. The strengthening phases can form during solidification and further during aging.…”

Section: Introductionmentioning

confidence: 99%

Dislocation slip distance during compression of Al–Si–Cu–Mg alloy with additions of Ti–Zr–V

Shaha

Czerwiński

Chen

et al. 2015

Materials Science and Technology

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The plastic deformation behaviour of the Al–Si–Cu–Mg alloy with micro-additions of Zr–V–Ti was measured in the temperature range of 298–673 K and the true stress–true strain compression curves were used to calculate the dislocation slip distance (DSD). A new constitutive equation for the temperature dependent DSD was developed, based on Mott's theory of strain hardening. The DSD predicted by the model was in good agreement not only with values achieved for the Al–Si–Cu–Mg alloy tested but also for other Al based and Pb–Sb alloys with deformation data available in the literature. A comparison of deformation and microstructure suggests that the grain refinement during hot compression deformation occurring due to continuous dynamic recrystallisation is responsible for a drastic growth of the DSD.

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Section: Introductionmentioning

confidence: 99%

Dislocation slip distance during compression of Al–Si–Cu–Mg alloy with additions of Ti–Zr–V

Shaha

Czerwiński

Chen

et al. 2015

Materials Science and Technology

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“…These requirements can be fulfilled by hypereutectic Al-Si alloys (Si > 13 wt.%) because of hard primary Si and ductile α-Al in its microstructure. However, the presence of large blocky primary Si and needle like eutectic Si causes brittleness in components [4][5] . Various studies have been conducted to refine the primary Si and to modify the eutectic Si morphology, e.g., by the addition of Phosphors (P) [6][7] , rare earth elements [8][9] and strontium (Sr) [10][11][12] as modifiers, by semi solid processing 13 , by electromagnetic stirring 14 and by melt thermal rate treatment [15][16][17][18] .…”

Section: Introductionmentioning

confidence: 99%

Combined effect of melt thermal treatment and Sr modifier on microstructure and mechanical properties of hypereutectic Al-14Si alloy

Manani

2023

Preprint

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This research aimed to investigate the combined effect of melt thermal treatment and Sr modifier on microstructure and mechanical properties of hypereutectic Al-14Si alloy. Various characterization techniques and testings such as optical microscopy, scanning electron microscopy, tensile test and hardness test were carried out to evaluate the samples. The results showed that the melt thermal treated alloys have a more refined primary Si phase and modified eutectic Si structure than that of the conventional cast alloys. This led to a considerable improvement in tensile strength, hardness and ductility in the melt thermal treated alloys. The mean size of primary Si and eutectic Si was lesser in the case of the sample that had undergone both melt thermal treatment and Sr-modification than the only Srmodified alloy. These lead to a significant improvement in mechanical properties of the alloy treated by both melt thermal treatment and Sr-modifier than only Sr-modified alloy.

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“…The same applies to the influence of the high-temperature state of the melt on the structure of alloys in the as-cast state. It is assumed that overheating of melts to high temperatures increases the degree of their homogeneity due to the intensification of the thermal motion of atoms, which leads to a decrease or destruction of atomic clusters [22,23].…”

Section: Introductionmentioning

confidence: 99%

Effect of Melt Overheating on Structure and Mechanical Properties of Al-Mg-Si Cast Alloy

Деев

Прусов

et al. 2021

Metals

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The paper discusses the complex effect of melt overheating with subsequent fast cooling down to the pouring temperature on the crystallization process, microstructure and mechanical properties of Al-Mg-Si aluminum alloy. The results obtained facilitated the establishment of rational modes of melt overheating, leading to a significant change in the dispersion and morphology of structural components. In particular, with an increase in the melt overheating temperature to 900 °C with holding and subsequent rapid cooling to the casting temperature, a decrease in the average size of dendritic cells of the aluminum solid solution from 39 μm to 13 μm was observed. We also noticed the refinement of eutectic inclusions of the Mg2Si phase with compact morphology. An increased level of mechanical properties was noted; the maximum values of tensile strength and elongation reached 228 MPa and 5.24%, respectively, which exceeded the initial values by 22.5% and 52.3%, correspondingly. The microhardness of the aluminum solid solution sequentially increased from 38.21 to 56.5 HV with an increase in the temperature during melt overheating. According to the EDS linear scanning, an increase in the superheat temperature of the melt is accompanied by an increase in the degree of saturation of the solid solution with magnesium.

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Effects of melt thermal rate treatment and modification of P and RE on hypereutectic Al–Si–Cu–Mg alloy

Cited by 21 publications

References 23 publications

Dislocation slip distance during compression of Al–Si–Cu–Mg alloy with additions of Ti–Zr–V

Dislocation slip distance during compression of Al–Si–Cu–Mg alloy with additions of Ti–Zr–V

Combined effect of melt thermal treatment and Sr modifier on microstructure and mechanical properties of hypereutectic Al-14Si alloy

Effect of Melt Overheating on Structure and Mechanical Properties of Al-Mg-Si Cast Alloy

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