Effect of Zn addition on the precipitation behaviors of Al–Mg–Si–Cu alloys for automotive applications

Guo, Muxing; Zhang, X. K.; Zhang, J. S.; Zhuang, Linzhong

doi:10.1007/s10853-016-0433-3

Cited by 37 publications

(7 citation statements)

References 45 publications

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“…Wang X et al [15] found that the Zn-free alloy sheet consists mainly of Cube ND , P and Goss orientations, while the sheet with high Zn content and Si content of 0.9wt.% after solution treatment possesses a stronger structure consisting of Cube ND , Cube, (012)<100>, (113)<392> and (023)<032> orientations. The effect of Zn addition on the precipitate sequence of Al-Mg-Si alloys was also widely reported [12,13,16] . With the increasing of Zn content, the precipitate sequence of Al-Mg-Si alloys from SSSS → atomic clusters → GP zones (pre-β″) → β″→ β′, U1, U2, B′→β changed to SSSS→atomic clusters→GP zones (pre-β″)→β″, L, S, C, QP, QC→β′→β.…”

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confidence: 71%

Effect of Si addition on microstructure and mechanical properties of Al-Mg-Si-Zn alloy

et al. 2020

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T he Al-Mg-Si alloys are heat-treatable materials, widely employed in the automotive industry, aerospace, and other fields, due to characteristics such as medium strength, low specific strength/stiffness, high formability, good weld ability, low cost, and high corrosion resistance [1, 2]. The relative content of Mg and Si (Mg/Si) were widely recognized for having an influence on the microstructure, mechanical properties and precipitation behavior of Al alloys [3-6]. Additionally, the presence of excess Si would promote the precipitation of uniform and fine-grained β″ phases, improving the age hardening response of the alloy. However, the excessive Mg content would reduce the stretching formability, make the 6xxx alloys exhibit low strength but excellent corrosion resistance [7, 8]. Some elements, such as Mn, Cu and Cr, are added as microstrengthening elements of Al-Mg-Si alloys [9-11]. Al-Mg-Si-Zn alloys are considered as the most promising candidates for automotive materials. The solid solubility of Zn in Al is 82.8 wt.% at eutectic temperature, and Zn atoms can combine with Mg forming plate-like semi-coherent η′ metastable precipitates and equilibrium η-MgZn 2 precipitates on

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confidence: 71%

Effect of Si addition on microstructure and mechanical properties of Al-Mg-Si-Zn alloy

et al. 2020

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“…In general, Al-Mg alloys can be further strengthened by solution and precipitation hardening, still, often at the expense of ductility. Adding alloying elements is the most commonly used method to improve the properties of alloys [4,5]. Magnesium additions to aluminum alloys cause a considerable lattice distortion, because of the atomic size difference leading to substantial solution strengthening and a high work-hardening exponent [6].…”

Section: Introductionmentioning

confidence: 99%

Effects of Gradient Hot Rolled Deformation on Texture Evolution and Properties of 1561 Aluminum Alloy

Yang

Wang

et al. 2022

Crystals

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Through gradient hot rolling, a transition zone from the initial undeformed to 30% deformed microstructure was obtained in the 6 mm thick 1561 aluminum alloy hot rolled plate. The effect of gradient deformation on the evolution process of structure and texture characteristics to 1561 aluminum alloy were systematically investigated by X-ray diffractometer (XRD), optical microscope (OM), and electron back-scattered diffraction (EBSD) in this paper. The results showed that after gradient hot rolling, the grains were elongated along the rolled direction, and the average grain size decreased from 18.95 μm to 1.19 μm. After annealing, the average grain size decreased from 28.34 μm to 10.69 μm. The fraction of dynamic recrystallization is low in all cases. With the increase in gradient deformation, the fraction of the deformed texture (110) <100> Goss, (110) <112 > Brass and fiber texture increased under the action of shear strain, the hardness value of annealed 1561 aluminum alloy ranged from 83.8 HV up to as high as 104 HV, and the electrical conductivity (EC) value increased from 23.5% IACS to 24.3% IACS. Significantly, with the increment of the deformation, the dislocation density increases 2.4 × 1013 m−2 of the annealed hot rolled plates, which should be responsible for the hardness increase. While the structure of the alloy becomes more orderly, the EC increases. Work hardening, fine-grain strengthening and texture all influence the mechanical properties of the gradient hot rolled 1561 aluminum alloy plate.

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“…The AlMg binary alloys [ 1,2 ] are the base for the various ternary (mainly AlMgSi) [ 3–17 ] and multicomponent [ 18–38 ] Al‐based industrial alloys. Their unique mechanical properties are controlled by the formation of Guinier–Preston (GP) zones, metastable and stable intermetallic phases during thermal [ 3,9,10,12,13,17–19,30,35 ] and mechanical [ 6,7,9,11,15,31,35 ] pretreatment, and natural and artificial ageing.…”

Section: Introductionmentioning

confidence: 99%

“…[ 5,9,10,12,13,17,20,35 ] The alloying with additional components modifies the precipitation sequence and, consequently, the resulted mechanical properties. [ 18–38 ] The plastic deformation of AlMg‐based alloys significantly affects the microstructure stability during following isothermal aging. It is because of the large density of dislocations.…”

Section: Introductionmentioning

confidence: 99%

“…[ 16 ] It leads to the extensive heterogeneous precipitation along dislocations [ 20,21 ] and modifies the precipitation sequence. [ 8,9,11,15,22–31 ] Exactly speaking, the additional defects shift the precipitation sequence toward the formation of stable phases instead of metastable ones. In case of severe plastic deformation (SPD), not only the dislocations but also numerous grain boundaries (GBs) appear in a material.…”

Section: Introductionmentioning

confidence: 99%

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Phase Transformations in the AlMg Alloys Driven by High‐Pressure Torsion

Kogtenkova

Straumal

Mazilkin

et al. 2021

Physica Status Solidi (b)

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As‐cast aluminum–magnesium alloys with 3, 5, and 10 wt% Mg are subjected to high‐pressure torsion (HPT) at room temperature: 5 GPa, five turns with rotation speed of 1 rpm. HPT leads to the strong grain refinement for both (Al) solid solution and intermetallic β‐phase. Transmission electron microscopy (TEM), differential scanning calorimetry (DSC), and X‐ray diffraction (XRD) are used to characterize the phase transitions under heating of the HPT‐treated alloys. The decomposition of the solid solution in the ultrafine‐grained Al–10 wt% Mg alloy obtained by HPT does not follow the equilibrium diagram. The results of DSC, XRD, and TEM show that the Mg‐rich intermetallic phases appear during heating in the following sequence: GP zones → β → ε → β → γ → β. The (Al)/(Al) grain boundaries (GBs) in the fine‐grained Al–10 wt% Mg alloy after HPT and annealing up to 400 °C (i.e., in the solid solution area, far from solvus and solidus lines) contain the Mg‐rich areas. This can be the result of possible GB phase transitions with the formation of Mg‐rich GB phases. The GBs in the binary AlMg can contain the thin layers of a GB phase far away from the solvus line.

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Effect of Zn addition on the precipitation behaviors of Al–Mg–Si–Cu alloys for automotive applications

Cited by 37 publications

References 45 publications

Effect of Si addition on microstructure and mechanical properties of Al-Mg-Si-Zn alloy

Effect of Si addition on microstructure and mechanical properties of Al-Mg-Si-Zn alloy

Effects of Gradient Hot Rolled Deformation on Texture Evolution and Properties of 1561 Aluminum Alloy

Phase Transformations in the AlMg Alloys Driven by High‐Pressure Torsion

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