Effect of heat treatment on the precipitate behaviour, corrosion resistance and high temperature tensile properties of 7055 aluminum alloy synthesis by novel spray deposited followed by hot extrusion

Khan, Muhammad Abubaker; Wang, Yangwei; Anjum, Muhammad Junaid; Yasin, Ghulam; Malik, Abdul; Nazeer, Faisal; Khan, Salman; Ahmad, Tahir; Zhang, Hao

doi:10.1016/j.vacuum.2020.109185

Cited by 38 publications

(7 citation statements)

References 22 publications

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“…Since the negative impact of Al 2 CuMg phases relative to crack growth on the alloy strength at this time is less than that of non-equilibrium solidification (promoting solute increase) on the alloy strength, the ductility of the material is also improved [33], the results were the same as Khan et al . [8]. Consequently, the Al 2 CuMg phase initially existing in the alloy was gradually melted into the matrix by homogenisation, which made the microstructure uniform and eliminated segregation.…”

Section: Resultsmentioning

confidence: 99%

“…Over the past few decades, as-cast 7055 alloy has been grain refined through large plastic deformation (SPD) process for better mechanical properties [5][6][7][8]. However, many studies have shown that Al-Zn-Mg-Cu alloys have complex phases in their as-cast or extruded microstructure, including η (MgZn 2 ), T (Al 2 Mg 3 Zn 3 ), S (Al 2 CuMg), and iron-rich phases [9][10][11].…”

Section: Introductionmentioning

confidence: 99%

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The evolution of Al₂CuMg phase during two-stage homogenisation for 7055 aluminium alloy

Guo

et al. 2023

Materials Science and Technology

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In this paper, the effect of two-stage homogenisation treatment on the evolution of the second phase was investigated. The microstructure of the extruded 7055 aluminium alloy was composed of α(Al) matrix and other second phases, including MgZn2, Al2CuMg, and Al7Cu2Fe phases. The segregation of second phase was serious and the content was 27.9%. During the 460°C × 24 h homogenisation, MgZn2 phases dissolved quickly, but there was still a significant amount of Al2CuMg phases present. After two-stage homogenisation (460°C × 24 h + 480°C × 10 h), the content of Al2CuMg phase decreased from 15% to 3% and the degree of segregation was reduced. In addition, the mechanical properties of the extruded 7055 alloy were effectively improved.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The evolution of Al₂CuMg phase during two-stage homogenisation for 7055 aluminium alloy

Guo

et al. 2023

Materials Science and Technology

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“…Generally, the corrosion dynamic parameters are used to characterize the corrosion resistance of alloys. Moreover, the corrosion current belongs to the category of corrosion dynamic parameters [ 55 ]. As such, this research selects the corrosion current as the judgment standard.…”

Section: Resultsmentioning

confidence: 99%

Effects of Aging Treatment on Corrosion Behavior of a Tensile Deformed Al-Cu-Mn-Fe-Zr Alloy in 3.5% NaCl Solution

et al. 2021

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In this paper, the effects of an aging treatment on the corrosion resistance/mechanism of a tensile deformed Al-Cu-Mn-Fe-Zr alloy are investigated. The impedance magnitude and polarization resistance increase, while the corrosion current decreases with the increased aging time and temperature. The discontinuously-distributed precipitates and precipitation-free zone, which can cut the corrosion channels, appear at grain boundaries when the temperature is relatively high and the aging time is relatively long. They can improve the corrosion resistance. Additionally, the intergranular and pitting corrosion are the main mechanisms. The intergranular corrosion is likely to occur in an under-aged alloy. This is because the potential difference between the grain boundaries and grains is high, due to the segregation of Cu atoms. When the aging degree is increased, the grain boundary precipitates reduce the potential difference, and the intragranular precipitates make the surrounding matrix prone to dissolution. As such, the pitting corrosion is likely to occur in the over-aged alloys.

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“…Heat treatment was used to enhance the mechanical properties of the LMD Al 7050 alloy. Many studies have shown that heat treatment can affect the microstructure and mechanical properties of Al 7050 alloy [9][10][11]. Therefore, an appropriate heat treatment process is very important to enhance the microstructure and properties of this alloy.…”

Section: Experimental Materials and Methodsmentioning

confidence: 99%

Laser melting deposition of aluminium 7050 alloy: Heat treatment, microstructure and mechanical properties

Zhao

Deng

et al. 2022

Materials Science and Technology

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In this study, the microstructure and mechanical properties of laser melting deposited 7050 aluminium alloy are investigated. An anisotropic microstructure is observed in the alloy: the columnar-grained structure on the building plane and a fine equiaxial structure on the scanning plane. Pores are the main metallurgical defects found but a higher energy input can significantly reduce large pores. The mechanical properties can be significantly improved with heat treatment. After being subjected to multiple solution and aging treatments, the hardness, ultimate tensile strength and elongation at break of the printed alloy increase by 58.6%, 14.06% and 27.8%, respectively. This research offers a reference for the formation technique of large and complex 7xxx series aluminium alloy parts by additive manufacturing.

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Effect of heat treatment on the precipitate behaviour, corrosion resistance and high temperature tensile properties of 7055 aluminum alloy synthesis by novel spray deposited followed by hot extrusion

Cited by 38 publications

References 22 publications

The evolution of Al₂CuMg phase during two-stage homogenisation for 7055 aluminium alloy

The evolution of Al₂CuMg phase during two-stage homogenisation for 7055 aluminium alloy

Effects of Aging Treatment on Corrosion Behavior of a Tensile Deformed Al-Cu-Mn-Fe-Zr Alloy in 3.5% NaCl Solution

Laser melting deposition of aluminium 7050 alloy: Heat treatment, microstructure and mechanical properties

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Effect of heat treatment on the precipitate behaviour, corrosion resistance and high temperature tensile properties of 7055 aluminum alloy synthesis by novel spray deposited followed by hot extrusion

Cited by 38 publications

References 22 publications

The evolution of Al2CuMg phase during two-stage homogenisation for 7055 aluminium alloy

The evolution of Al2CuMg phase during two-stage homogenisation for 7055 aluminium alloy

Effects of Aging Treatment on Corrosion Behavior of a Tensile Deformed Al-Cu-Mn-Fe-Zr Alloy in 3.5% NaCl Solution

Laser melting deposition of aluminium 7050 alloy: Heat treatment, microstructure and mechanical properties

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The evolution of Al₂CuMg phase during two-stage homogenisation for 7055 aluminium alloy

The evolution of Al₂CuMg phase during two-stage homogenisation for 7055 aluminium alloy