Microstructure refinement and enhanced tensile properties of Al-11Mg2Si alloy modified by erbium

Wang, Ke Yan; Xiang, Jun; Zhao, Rui; Bi, J.; Wu, Xiao‐Feng; Chen, Ming Hua; Wu, F. F.; Eckert, Jürgen

doi:10.1016/j.jallcom.2020.158421

Cited by 17 publications

(2 citation statements)

References 27 publications

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“…It can be seen that at lower stress amplitudes, mainly eutectic Si fracture occurs, while at higher stress amplitudes of 280 MPa (Fig. 16b), besides eutectic fracture most needle-like iron-rich phases involve in crack extension, meaning that stress amplitude significantly influences fatigue crack extension behavior [46][47][48]. In general, needle-like β-Al 5 FeSi phase has the most detrimental effect on the mechanical properties of Al alloys [49][50][51].…”

Section: Fracture Characteristicsmentioning

confidence: 95%

Modification Mechanism and Uniaxial Fatigue Performances of A356.2 Alloy Treated by Al-Sr-La Composite Refinement-Modification Agent

Chang

Zhao

Xia

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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Modification mechanism and uniaxial fatigue properties of A356.2 alloy treated by Al-6Sr-7La and traditional Al-5Ti-1B/ Al-10Sr (hereinafter refers to traditional treated alloy) were investigated by constant stress amplitude method. Microstructure, dislocation and Si twinning of the alloys were studied by thermal analysis, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). The results showed that Al-6Sr-7La possesses better refining and modification effect than Al-5Ti-1B/Al-10Sr. Meanwhile, fatigue properties of the alloy treated by Al-6Sr-7La are higher than traditional treated alloy, and this is mainly owing to that Al-6Sr-7La treated alloy has more twins in eutectic Si and lower twin spacing. In addition, higher density of nanophases formed on twin faces and La-rich clusters appear at multiple twin intersections. Stacking faults and entrapped nanophases appeared on growing Si twin faces. Impurity induced twinning (IIT) mechanism and twin plane re-entrant edge (TPRE) mechanism are valid for eutectic Si which are important for mechanical optimization of A356.2 alloy.

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Section: Fracture Characteristicsmentioning

confidence: 95%

Modification Mechanism and Uniaxial Fatigue Performances of A356.2 Alloy Treated by Al-Sr-La Composite Refinement-Modification Agent

Chang

Zhao

Xia

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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“…From the literatures, an addition of 0.2 wt.%Er in Al-Mg-Si alloy was the optimal condition, yielding the best tensile strength and elongations. More than 0.4 wt.% Er would lead to the existence of the Al3Er at grain boundaries and a larger Al3Er [5][6][7][8]. Recent studies have mainly focused on the effect of Er in Al-Mg-Si and Al-Si alloys, such as A356.…”

Section: Introductionmentioning

confidence: 99%

Influence of Erbium and Thermal Treatments on the Microstructure and Hardness of Al-Mg-Si Alloy

Mikami

Banjongprasert

2023

MSF

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The influence of Erbium (Er) addition and thermal treatments on the microstructure and hardness of Al-0.5 wt.%Mg-1.0 wt.%Si alloy has been studied. Chemical composition of the alloys was measured by optical emission spectrometry (OES) and x-ray fluorescence (XRF). Microstructural evolution of as-cast, solution-treated, and aged samples were characterized by scanning electron microscope (SEM). The phase identification and elemental distribution were obtained from energy dispersive spectroscopy (EDS). From the microstructure, it was confirmed that solutionization at 570 ͦ C for 15 hours dissolved the Mg2Si and Er-rich intermetallics. However, some Fe-rich intermetallics remained after the solution heat treatment. Er addition had a role on the modification of β-AlFeSi and improved the hardness. Er-modified Al-Mg-Si alloy gave a significant improvement in mechanical properties. Therefore, Er is one of the candidate elements that could provide an opportunity for a high-strength Al-Mg-Si alloy.

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In situ SEM characterization of tensile behavior of nano-fibrous Al–Si and Al–Si–Sr eutectics

Wei,

Wu,

Ghosh

et al. 2023

J Mater Sci

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Microstructure refinement and enhanced tensile properties of Al-11Mg2Si alloy modified by erbium

Cited by 17 publications

References 27 publications

Modification Mechanism and Uniaxial Fatigue Performances of A356.2 Alloy Treated by Al-Sr-La Composite Refinement-Modification Agent

Modification Mechanism and Uniaxial Fatigue Performances of A356.2 Alloy Treated by Al-Sr-La Composite Refinement-Modification Agent

Influence of Erbium and Thermal Treatments on the Microstructure and Hardness of Al-Mg-Si Alloy

In situ SEM characterization of tensile behavior of nano-fibrous Al–Si and Al–Si–Sr eutectics

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