Effect of aging treatment on microstructure, mechanical and corrosion properties of 7055 aluminum alloy prepared using powder by-product

Wang, Tao; Yang, Lun; Tang, Zhaofeng; Liu, Chao; Ma, Yunzhu; Wu, Lei; Yan, Huanyuan; Yu, Zhaoji; Liu, Wensheng

doi:10.1016/j.msea.2021.141606

Cited by 36 publications

(15 citation statements)

References 51 publications

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“…High-strength 7000 series aluminum alloys have been widely used in the aerospace industry due to their unique properties [1][2][3][4][5][6][7]. Their high strength properties are obtained through heat treatment, during which conventional methods of precipitation hardening based on supersaturation and subsequent aging are usually used.…”

Section: Introductionmentioning

confidence: 99%

“…The third Retrogression and Reaging (RRA) heat treatment involving multi-stage aging treatments provides better control over the resulting precipitates responsible for strengthening, and thus increases the chance of obtaining a microstructure that will provide a favorable combination of mechanical strength and corrosion susceptibility [3,4,7,19,20,24]. Retrogression involves heating of the previously precipitation-strengthened alloy at temperatures in the range of 200-260 • C for a short time (120s), followed by Reaging typical of T6 peak aging [1,2,6].…”

Section: Introductionmentioning

confidence: 99%

“…Significant potential differences contribute to the rate of formation and amount of galvanic corrosion between the matrix and (GBPs) or (PFZs) [40]. Therefore, 7000 series alloys are particularly susceptible to intergranular corrosion and exfoliation [3,4,7,19,32,41]. The unfavorable effect of alloy aging may be associated with PFZ widening near the grain boundaries [11,29] and the reduction in copper content in them [18].…”

Section: Introductionmentioning

confidence: 99%

“…This leads to reduced resistance to intergranular corrosion. The continuous η phase at grain boundaries makes it a very good anodic pathway for the development of intergranular corrosion [3,29]. The rate of anodic dissolution along grain boundaries can be hindered by increasing the size and spacing of GBP precipitates, reducing the susceptibility to intergranular corrosion [29,42].…”

Section: Introductionmentioning

confidence: 99%

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Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy

Ładak

Cichoń

Lachowicz

2022

CMD

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The corrosion resistance of the AW7075 alloy after RRA treatment was evaluated. The corrosion rate in the NSS test was assessed and the electrochemical parameters were determined. The results were compared with the results obtained for the alloy subjected to conventional aging (T6) and dual-stage aging (DA). In order to determine the state of alloy hardening, the tests were carried out simultaneously with the material hardness measurements and microscopic examinations. The hardness of the AW7075 alloy increased in the following order: DA < T6 < RRA. The tests revealed that the achieved increase in strengthening was correlated with the preservation of high resistance to general corrosion of the alloy after RRA treatment. After the corrosion tests, SEM microscopic observations were also carried out to determine the corrosion features. The corrosion rate can be arranged in the following order: RRA < T6 ≈ DA. At the same time, the alloy after RRA was characterized by the lowest value of the corrosion potential and the open circuit. The corrosion potential value can be presented in increasing order: RRA < T6 ≈ DA. The corrosion behavior of the aluminum alloy after dual-stage aging was similar to that of T6. However, it was accompanied by a decline in hardening.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy

Ładak

Cichoń

Lachowicz

2022

CMD

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“…However, the mechanical properties of original casting aluminum alloys are still lower than those of wrought aluminum alloys [18][19][20] . For instance, the microstructural problem of Al-Si alloys induced by the formation of a flake-type brittle (Si) phase during solidification, the low toughness of Al-Cu alloys, the low ductility of Al-Mg alloys, and the intergranular and stress corrosion cracking of Al-Zn alloys restrict the application of casting aluminum alloys.…”

Section: Introductionmentioning

confidence: 99%

Boosting for concept design of casting aluminum alloys driven by combining computational thermodynamics and machine learning techniques

Wang¹,

Liu²,

Gao³

et al. 2021

JMI

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Casting aluminum alloys are commonly used in industries due to their excellent comprehensive performance. Alloying/microalloying and post-solidification heat treatments are the most common measures to tune the microstructure for enhancing their mechanical properties. However, it is very challenging to achieve accurate and efficient development of novel casting aluminum alloys using the traditional trial-and-error method. With the rapid development of computer technology, the computational thermodynamics (CT) in the framework of the CALculation of PHAse Diagram approach, the data-driven machine learning (ML) technique, and also their combinations have been proved to be effective approaches for the design of casting aluminum alloys. In this review, the state-of-the-art computational alloy design approaches driven by CT and ML techniques, as well as their combinations, were comprehensively summarized. The current status of the thermodynamic database for aluminum alloys, as the core for CT, was also briefly introduced. After that, a variety of successful case studies on the design of different casting aluminum alloys driven by CT, ML, and their combinations were demonstrated, including common applications, CT-driven design of Sc-additional Al-Si-Mg series casting alloys, and design of Srmodified A356 alloys driven by combing CT and ML. Finally, the conclusions of this review were drawn, and perspectives for boosting the computational design approach driven by combining CT and ML techniques were pointed out.

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Effect of Different Aging Treatments on the Microstructure and Corrosion Resistance of ADC12 Alloy

Zhang

et al. 2023

J. of Materi Eng and Perform

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Effect of aging treatment on microstructure, mechanical and corrosion properties of 7055 aluminum alloy prepared using powder by-product

Cited by 36 publications

References 51 publications

Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy

Evaluation of the Effect of Dual-Stage Aging and RRA on the Hardening and Corrosion Resistance of AW7075 Alloy

Boosting for concept design of casting aluminum alloys driven by combining computational thermodynamics and machine learning techniques

Effect of Different Aging Treatments on the Microstructure and Corrosion Resistance of ADC12 Alloy

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