Effects of non-isothermal aging on mechanical properties, corrosion behavior and microstructures of Al-Cu-Mg-Si alloy

Zhan, Xin; Tang, Jianguo; Li, Huizhong; Liang, Xiaopeng; Lu, Yuexiang; Che, Yixuan; Tu, Wenbin; Zhang, Yidan

doi:10.1016/j.jallcom.2019.152960

Cited by 54 publications

(24 citation statements)

References 45 publications

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“…In Figure 6 b, the main elements of the corrosion products are measured as oxygen, aluminum, and chlorine, i.e., Al(OH) 3 and AlCl 3 . The formation of Al(OH) 3 is mainly due to the hydrolysis reaction, which is caused by some aluminum ions [ 56 ]. The hydrolysis reaction can be expressed as,

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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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…”

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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“…[28,29] The YS and UTS value for the T6I6 temper is found to be 420 and 462 MPa, respectively, which is in accordance with the literature. [16,[18][19][20][21][26][27][28] The high value of UTS for the temper compared to all the isothermally aged tempers is simply attributed to the extreme interactions between solute phase atoms and the surrounding dislocations. [19,20,27] Therefore it is observed that along with an increase in hardness, there is a similar increase in strength reaching a peak point (T6I6 alloy temper).…”

Section: Tensile Propertiesmentioning

confidence: 99%

Effects of isothermal and interrupted aging on mechanical properties and corrosion behavior of an Al–Cu–Mg alloy

Majumder

Rao²,

Rout

2023

Materials & Corrosion

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Al–Cu–Mg alloys are extensively used in the area of the aerospace industry for the construction of aviation parts due to their extremely good mechanical properties. Al–Cu–Mg alloys achieve high strength through various heat treatments. However, aluminum alloys at peak strength conditions, are highly susceptible to various forms of corrosion, such as pitting corrosion, intergranular corrosion, and environment‐induced cracking. In this investigation, the Al–Cu–Mg alloy was solution treated and isothermally aged to develop quenched, under‐aged, peak‐aged (PA), and over‐aged tempers. Furthermore, interrupted aging treatment was then carried out to develop T6I6 temper. Aging behavior was then studied using hardness data, tensile data, and differential scanning calorimetry. The corrosion behavior of all tempers was studied by measuring open circuit potential and by linear potentiodynamic polarization. It is observed that PA temper exhibits good mechanical properties but poor resistance to corrosion, while T6I6 alloy temper exhibits the best mechanical properties along with the highest corrosion resistance.

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“…[ 109 ] In addition, the mechanical properties and corrosion resistance can be enhanced simultaneously through nonisothermal aging treatment. [ 110 ] Overall, multiple deformation processes can provide Al alloys with better microstructure and shape, and appropriate postheat treatment could optimize the mechanical properties. The postheat treatment methods should be designed and applied in view of the special thermophysical parameters of cryo‐fromed Al alloys.…”

Section: Cryo‐forming Techniquesmentioning

confidence: 99%

Development of High Performance of Al Alloys via Cryo‐Forming: A Review

Xiong

Su²,

Kong

et al. 2021

Adv Eng Mater

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Weight reduction is a major trend in the development of automotive, marine, and aerospace industry. Al alloys are the ideal choice for the lightweight design because of their superior mechanical properties and small mass density. In recent years, research results have demonstrated that plastic processing at cryogenic temperature can improve the mechanical properties of Al alloys. Herein, the mechanical properties of Al alloys at cryogenic environment as well as at room temperature are compared, and then the main progress is introduced in the development of fabrication of high‐performance Al alloys using cryo‐forming methods, such as cryorolling, asymmetric cryorolling, cryo‐extrusion, and cryo‐forging, with subsequent heat treatment. The grain refinement mechanism and the strengthening mechanism of Al alloys during various cryo‐forming processes are discussed. Finally, the potential development prospects of future researches in this field are proposed.

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Effects of non-isothermal aging on mechanical properties, corrosion behavior and microstructures of Al-Cu-Mg-Si alloy

Cited by 54 publications

References 45 publications

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

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

Effects of isothermal and interrupted aging on mechanical properties and corrosion behavior of an Al–Cu–Mg alloy

Development of High Performance of Al Alloys via Cryo‐Forming: A Review

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