Effect of high Cu concentration on the mechanical property and precipitation behavior of Al–Mg–Zn-(Cu) crossover alloys

Zhang, Zhaorui; Li, Yue; Zhang, Di; Zhang, Jishan

doi:10.1016/j.jmrt.2022.08.171

Cited by 21 publications

(5 citation statements)

References 47 publications

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“…After solid solution treatment, coarse grain boundary phase with high Mg content was difficult to enter the single-phase Al region, so the formation of refractory phase in Mg rich (2.65%, mass fraction) aluminum alloy could be promoted by adding Cu element, which was conducive to maintaining the peak strength of the alloy in the over-aging state [8]. In addition, it had been found that compared with non-Cu alloys, the yield strength of Al-4.0Mg-3.0Zn-1.5Cu aluminum alloys with high Cu increased by 80.5%, while the ductility didn't decrease [17]. Therefore, a balance between ductility and strength was expected to be achieved by appropriate adjustment of Cu/Mg ratio.…”

Section: Cu/mg Ratio 241 the Synergistic Action Of Cu And Mgmentioning

confidence: 99%

Research Status and Prospective Properties of the Al-Zn-Mg-Cu Series Aluminum Alloys

Wang

2023

Metals

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An Al–Zn–Mg–Cu alloy has high specific strength, good corrosion resistance, fracture toughness and fatigue resistance. It is one of the most important structural materials in the fields of aviation, aerospace, weapons and transportation; in particular, it plays a huge role in the field of aerospace. In order to optimize the strength, toughness and corrosion properties of an Al–Zn–Mg–Cu alloy, the focus of research on this alloy has always been on the alloying process. The effects of the main alloying elements, trace alloying elements and rare earth elements on the microstructure and properties of Al–Zn–Mg–Cu alloys are briefly introduced in this paper, and future research directions are proposed.

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Section: Cu/mg Ratio 241 the Synergistic Action Of Cu And Mgmentioning

confidence: 99%

Research Status and Prospective Properties of the Al-Zn-Mg-Cu Series Aluminum Alloys

Wang

2023

Metals

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“…20 The addition of 1.5 wt-% Cu to Al-Mg-Zn alloys improve the yield strength by about 80.5% without loss the elongation, which is mainly attributed to the solid solution strengthening and precipitation strengthening of Cu. 21 However, the addition of Cu on the mechanical properties and corrosion behaviours of Al-Mg alloys, especially Al-Mg alloys with high Mg content, is less studied. In this paper, it is expected to reduce the precipitation of β-phase at grain boundaries and balance the potential difference by adding Cu, so the effect of Cu content on the microstructure, mechanical properties and corrosion behaviours of Al-9.2Mg-0.8Mn alloys are studied, and the related mechanisms are revealed.…”

Section: Introductionmentioning

confidence: 99%

Effect of Cu addition on the mechanical properties and corrosion behaviours of Al–9.2Mg–0.8Mn alloy

Hao,

Xia,

et al. 2024

Corrosion Engineering, Science and Technology: The Internationa

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Microalloying is an effective method to improve the properties of Al–Mg alloys. The microstructure, mechanical properties and corrosion behaviours of Al–9.2Mg–0.8Mn– xCu ( x = 0–1.2 wt-%) alloys are studied to promote the application of Al–Mg alloys. The addition of Cu increases the strength of the alloy, where the ultimate tensile strength of 0.6 wt-% Cu alloy is improved by 43 MPa. Moreover, the addition of Cu significantly affects the corrosion behaviours of alloys. For as-sensitised alloys, compared to the matrix, the 0.1 wt-% Cu alloy shows a 28.3% reduction in pitting corrosion mass loss, which is attributed to the Cu element can form a stable passivation film, and the 0.3 wt-% Cu alloy shows a 15% reduction in intergranular corrosion mass loss, which is attributed to the addition of Cu can restrict the β phase precipitation at grain boundaries. The study shows that Cu-alloying can improve the comprehensive properties of Al–9.2Mg–0.8Mn alloys.

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“…A novel approach to developing crossover alloys based on using aluminum alloy scraps was presented [9]. The crossover alloys combine the properties of mixed alloys of different series [10][11][12][13][14][15][16][17]. A novel crossover Al-5.64Mg-5.43Zn-0.51Cu alloy with ultra-high strength was developed based on Al-Mg/Al-Zn-Mg-(Cu) systems [13].…”

Section: Introductionmentioning

confidence: 99%

Microstructure and Phase Composition of Novel Crossover Al-Zn-Mg-Cu-Zr-Y(Er) Alloys with Equal Zn/Mg/Cu Ratio and Cr Addition

Glavatskikh,

Barkov,

Gorlov

et al. 2024

Metals

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The effect of 0.2%Cr addition on the structure, phase composition, and mechanical properties of the novel cast and wrought Al-2.5Zn-2.5Mg-2.5Cu-0.2Zr-Er(Y) alloys were investigated in detail. Chromium is distributed between primary crystals (5.7–6.8%) of the intermetallic phase and the aluminum solid solution (0.2%) (Al). The primary crystals contain for the main part Cr, Ti, Er(Y). The experimental phase composition is in good correlation with the thermodynamic computation data. The micron-sized solidification origin phases (Al8Cu4Er(or Y) and Mg2Si) and supersaturated (Al) with nano-sized Al3(Zr,Ti) and E (Al18Mg3Cr2) precipitates are presented in the microstructure of the novel alloys after solution treatment. The nucleation of η (MgZn2) (0.5%), S (Al2CuMg) (0.4%), and T (Al,Zn,Mg,Cu) (8.8%) phase precipitates at 180 °С, providing the achievement of a maximum hardness of 135 HV in the Al2.5Zn2.5Mg2.5CuYCr alloy. The corrosion potential of the novel alloy is similar to the Ecor of the referenced alloy, but the corrosion current density (0.68–0.98 µA/sm2) is still significantly lower due to the formation of E (Al18Mg3Cr2) precipitates and S phase precipitates of the aging origin, in addition to the T phase. The formation of E (Al18Mg3Cr2) precipitates under the solution treatment provides a lower proportion of recrystallized grains (2.5–5% vs. 22.4–25.1%) and higher hardness (110 HV vs. 85–95 HV) in the Cr-rich alloys compared to the referenced alloys. Solution treated, hot and cold rolled, recrystallized, water quenched and aged at 210 °С alloys demonstrate an excellent microstructure stability and tensile properties: YS = 299–300 MPa, UTS = 406–414 MPa, and El. = 9–12.3%.

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Effect of high Cu concentration on the mechanical property and precipitation behavior of Al–Mg–Zn-(Cu) crossover alloys

Cited by 21 publications

References 47 publications

Research Status and Prospective Properties of the Al-Zn-Mg-Cu Series Aluminum Alloys

Research Status and Prospective Properties of the Al-Zn-Mg-Cu Series Aluminum Alloys

Effect of Cu addition on the mechanical properties and corrosion behaviours of Al–9.2Mg–0.8Mn alloy

Microstructure and Phase Composition of Novel Crossover Al-Zn-Mg-Cu-Zr-Y(Er) Alloys with Equal Zn/Mg/Cu Ratio and Cr Addition

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