Impact of high strain rate deformation on the mechanical behavior, fracture mechanisms and anisotropic response of 2060 Al-Cu-Li alloy

El-Aty, Ali Abd; Xu, Yong; Zhang, Shihong; Ha, Sangyul; Ma, Ying; Chen, Dayong

doi:10.1016/j.jare.2019.01.012

Cited by 54 publications

(13 citation statements)

References 43 publications

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“…This is because dislocations quickly accumulate in material. Meanwhile, the rearrangement and annihilation of dislocations are low because of the short deformation time [26,27]. However, in the plastic deformation stage, the slope of the flow stress curve gradually decreases with increased strain.…”

Section: Deformation Behavior and Mechanismsmentioning

confidence: 99%

Deformation Behavior and Precipitation Features in a Stretched Al–Cu Alloy at Intermediate Temperatures

et al. 2020

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Deformation behavior and precipitation features of an Al–Cu alloy are investigated using uniaxial tensile tests at intermediate temperatures. It is found that the true stress drops with the decreased strain rate or the increased deformation temperature. The number of substructures and the degree of grain elongation decrease with the raised temperature or the decreased strain rate. At high temperatures or low strain rates, some dynamic recrystallized grains can be found. The type of precipitates is influenced by the heating process before hot tensile deformation. The content and size of precipitates increase during tensile deformation at intermediate temperatures. As the temperature increases over 200 °C, the precipitation process (Guinier Preston zone (G.P. zones)→θ′′ phase→θ′ phase) is enhanced, resulting in increased contents of θ′′ and θ′ phases. However, θ′′ and θ′ phases prefer to precipitate along the {020}Al direction, resulting in an uneven distribution of phases. Considering the flow softening degree and the excessive heterogeneous precipitation of θ′′ and θ′ phases during hot deformation, the reasonable strain rate and temperature are about 0.0003 s−1 and 150 °C, respectively.

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Section: Deformation Behavior and Mechanismsmentioning

confidence: 99%

Deformation Behavior and Precipitation Features in a Stretched Al–Cu Alloy at Intermediate Temperatures

et al. 2020

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“…One of the newest candidates in the family of the third generation Al-Li alloys is AA2060-T8 alloy which launched by Alcoa Inc. in 2011 to take the place of AA7075-T6 and AA2024-T3 for fuselage structures and lower, and upper wings [2]. Although AA2060-T8 possesses superior physical and mechanical properties, its board applications are restricted notably at room temperature because of poor formability; anisotropic behavior which caused serious issues during deformation; and IOP Publishing doi:10.1088/1757-899X/1238/1/012017 2 springback and wrinkling which are in turn add to the cost of the die and the final components due to the try-out time [3,4]. Forming at elevated temperatures [5] are considered as significant methods to address the above-mentioned shortcomings of AA2060-T8 sheets and minimize the drawbacks of forming this alloy using traditional cold forming technologies.…”

Section: Introductionmentioning

confidence: 99%

Phenomenological-based constitutive modelling of warm deformation behavior of high-Strength lightweight AL-Li alloy sheets

El-Aty

Zhang

et al. 2022

IOP Conf. Ser.: Mater. Sci. Eng.

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The flow behavior and formability of Al-Li alloys under warm forming conditions are complicated because they depend on several factors, such as the deformation mode, strain, and strain rates. Therefore, characterizing the mechanical response, and deformation behavior of AA2060-T8 sheets under a wide range of temperatures and strain rates is crucial to develop a new thermo-mechanical processing (TMP) route for their wide industrial applications. Furthermore, determining the activation energy (Q) and predicting the flow behaviour of AA2060-T8 sheets under warm forming temperatures is meaningful for characterizing the mechanical response of AA2060-T8 sheets at warm deformation conditions. Thus, in this study, the Arrhenius constitutive model is developed to investigate the influence of strain rate and temperature on the warm deformation behaviour of AA2060-T8 and determine the activation energy (Q) of AA2060-T8, which is a crucial physical parameter to estimate the difficulties of deforming AA2060-T8 sheets under warm forming conditions.

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“…This applies, for example, to swing hammers, where the Charpy impact bending test is commonly known and used, and also in the conditions of industrial laboratories. In the case of modified Hopkinson bar systems, where strain rates in the range of 500 s −1 -10 5 s −1 are obtained, the problem is the availability of the apparatus and the complexity of the procedures for analyzing the results [10][11][12]. Most often, tests are carried out in tests for compressing cylindrical samples because this method of loading is simple and effective.…”

Section: Introductionmentioning

confidence: 99%

A New Method of Testing the Dynamic Deformation of Metals

et al. 2021

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This paper presents the characteristics of a modernized rotary hammer equipped with a new measuring system based on strain gauges for recording short-term signals. The stand makes it possible to carry out dynamic tensile and bending tests in the range of linear speed of the exciting element from 5 to 40 m/s. Initial tests of dynamic deformation and structural studies in the form of fractures carried out on a representative group of metallic materials allowed determining the correlation “strain rate–strain structure”. The proposed new methodology of dynamic materials testing is an original achievement of the authors and may be an effective tool for assessing the properties of construction materials under conditions of dynamic deformation. In practice, the test results can be used to design the structures of energy-consuming elements of vehicles and aircraft load-bearing elements subjected to dynamic loads. Having an extensive database of results from dynamic tests will allow verifying the correctness of calculations of the structure with the use of the finite element method.

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Impact of high strain rate deformation on the mechanical behavior, fracture mechanisms and anisotropic response of 2060 Al-Cu-Li alloy

Abstract: Graphical abstract

Cited by 54 publications

References 43 publications

Deformation Behavior and Precipitation Features in a Stretched Al–Cu Alloy at Intermediate Temperatures

Deformation Behavior and Precipitation Features in a Stretched Al–Cu Alloy at Intermediate Temperatures

Phenomenological-based constitutive modelling of warm deformation behavior of high-Strength lightweight AL-Li alloy sheets

A New Method of Testing the Dynamic Deformation of Metals

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