Effect of Eu addition on the microstructures and mechanical properties of A356 aluminum alloys

Mao, Feng; Yan, Guangyuan; Xuan, Zhenjing; Cao, Zhiqiang; Wang, Tongmin

doi:10.1016/j.jallcom.2015.06.266

Cited by 112 publications

(43 citation statements)

References 33 publications

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“…However, the addition of 0.3 wt% Er leads to grain refinement in present experiment. Based on the projection of liquidus surface in the Al‐rich corner of quaternary Al–Si–Mg–Fe phase diagram, it can be explained by the following equilibrium solidification path for the studied alloy: 1) L → α (Al); 2) binary eutectic reactions: L → α (Al) + β ‐Fe(primary β ), L → α (Al) + Si; 3) ternary eutectic reactions: L → α (Al) + Si + β ‐Fe(secondary β ), L → α (Al) + Si + Mg 2 Si; 4) quaternary peritectic reaction: L + β ‐Fe → α (Al) + Si + π ‐Fe; 5) quaternary eutectic reaction: L → α (Al) + Si + Mg 2 Si + π ‐Fe. During the solidification of Al–7Si–0.4Mg alloys, primary α ‐Al phase nucleated at the liquidus temperature.…”

Section: Discussionmentioning

confidence: 99%

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Effect of Erbium on the Microstructure and Mechanical Properties of Semi‐Solid Al–7Si–0.4Mg Alloy

Wang

et al. 2018

Adv Eng Mater

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In this paper, semi-solid Al-7Si-0.4Mg-x erbium(Er) (x ¼ 0, 0.1, 0.3, 0.5, 0.8 wt%) alloys are fabricated via electromagnetic stirring method. The effects of Er on the microstructures and mechanical properties of semi-solid Al-7Si-0.4Mg alloys are investigated. Results show that the eutectic π-phase is modified to fine sized Er-poor π-phase and primary α-Al is refined in semisolid Al-7Si-0.4Mg alloys with the addition of Er. Meanwhile, the plate-like shape eutectic Si is transformed into fibrous eutectic Si with addition of Er, which has an excellent modification effect on the eutectic Si. Nucleation rate of the Er-poor π-phase is increased with a higher super cooling rate, which causes the refinement of primary α-Al and the modification of eutectic Si phase. With the addition of 0.3 wt% Er, semi-solid Al-7Si-0.4Mg alloys obtain the best tensile properties. The ultimate tensile strength and elongation values are 228 MPa and 10.4%, which is increased by 7% and 50% than Erfree alloy, respectively.Al-7Si-0.4Mg casting alloy is widely used in the auto-motive industry because of the good specific mechanical properties. Semisolid metal processing (SSM) is widely used in Al alloys due to the spherical primary α-Al grain structure. [1][2][3] Zhang et al. [4]

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Section: Discussionmentioning

confidence: 99%

“…Sr and Na had been widely used to modify the morphology of eutectic Si . Recently, the rare earth element has been reported that it can modify the eutectic Si effectively, and it effectively degassed and removed slag . The rare earth element was expected to be the new type of material for replacement of the modifier.…”

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confidence: 99%

Effect of Erbium on the Microstructure and Mechanical Properties of Semi‐Solid Al–7Si–0.4Mg Alloy

Wang

et al. 2018

Adv Eng Mater

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“…The refinement and migration of primary Si depended on the Lorentz force, gravity and the effective viscous force [16]. Mao found that a small amount of Eu can change the eutectic Si from a coarse plate to a fiber and significantly improve the mechanical properties [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Mg addition on microstructure and mechanical properties of Al-Si-Cu-Fe alloy with squeeze casting

Jiang

et al. 2019

Mater. Res. Express

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In this work, the Al-10Si-2.5Cu-0.8Fe alloy was used as the base alloy to squeeze casting with different content Mg-10Al master alloy addition. The effects of microstructure and mechanical properties were investigated by XRD, OM, SEM, and tensile test analysis. The results show that with the increase of Mg addition, the morphology of eutectic Si in the alloy changes from strip to fiber and the size is obviously reduced. Al 8 Mg 3 FeSi 6 phase in the microstructure gradually grows, and the splitting effect on the matrix structure is increased. The tensile strength and elongation of the alloy increased first and then decreased with the increase of Mg content. When the Mg content is 1.38%, the tensile strength of the alloy reached a maximum of 289 MPa and the elongation is 2.24%. The hardness of the alloy gradually increases. When the Mg content is 2.51%, the hardness reaches 121.8 HV. The cleavage surface in the fracture becomes fine with the increase of Mg content, the number of dimples increases, and the fracture mode transitions from quasi-cleavage fracture to brittle fracture.

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“…Such properties are attractive to the automobile industry, particularly for engine blocks, pistons cylinder heads, chain cover, and valve lifters. [11,12] Alloying with Ti, [13] B, [14][15][16] Sr, [8,17] rare earth elements such as Sc, [18] La, [19,20] Ce, [2] Nd, [21] Sm, [22] Eu, [23,24] Er, [25] and Yb [26,27] has shown to effectively improve both microstructure and tensile properties of eutectic Al-Si alloys. [7][8][9][10] Besides fast cooling rate and vibration, the typical method of refining the eutectic Al-Si alloy microstructure is the addition of certain modifying elements.…”

Section: Introductionmentioning

confidence: 99%

“…[7][8][9][10] Besides fast cooling rate and vibration, the typical method of refining the eutectic Al-Si alloy microstructure is the addition of certain modifying elements. [11,12] Alloying with Ti, [13] B, [14][15][16] Sr, [8,17] rare earth elements such as Sc, [18] La, [19,20] Ce, [2] Nd, [21] Sm, [22] Eu, [23,24] Er, [25] and Yb [26,27] has shown to effectively improve both microstructure and tensile properties of eutectic Al-Si alloys.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Mechanical Properties of Al–12.6Si Eutectic Alloy Modified with Al–5Ti Master Alloy

Wang

Peng

et al. 2017

Adv Eng Mater

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The Al-12.6Si eutectic alloy has been modified via the Al-5Ti master alloy to improve both microstructure and mechanical properties. The results show that the fraction of the primary a-Al phase in the Al-12.6Si alloy and the mechanical properties of the resulting alloy vary considerably after modification with the Al-5Ti master alloy at different temperatures. With increasing modification temperature, the fraction of primary a-Al in the Al-12.6Si alloy increases, varying with the amount of added Al-5Ti. For an added amount of 0.2 wt.% Al-5Ti, the fraction of primary a-Al in the Al-12.6Si alloy reaches a maximum. The tensile strength and elongation of an Al-12.6Si alloy modified with 0.2 wt.% Al-5Ti at different temperatures evidently increase compare with unmodified alloys.

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Effect of Eu addition on the microstructures and mechanical properties of A356 aluminum alloys

Cited by 112 publications

References 33 publications

Effect of Erbium on the Microstructure and Mechanical Properties of Semi‐Solid Al–7Si–0.4Mg Alloy

Effect of Erbium on the Microstructure and Mechanical Properties of Semi‐Solid Al–7Si–0.4Mg Alloy

Effect of Mg addition on microstructure and mechanical properties of Al-Si-Cu-Fe alloy with squeeze casting

Microstructure and Mechanical Properties of Al–12.6Si Eutectic Alloy Modified with Al–5Ti Master Alloy

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