A novel method to evaluate the high strain rate formability of sheet metals under impact hydroforming

Chen, Dayong; Xu, Yong; Zhang, Shihong; Ma, Ying; El-Aty, Ali Abd; Banabic, Dorel; Pokrovsky, A. I.; Bakinovskaya, Alina A.

doi:10.1016/j.jmatprotec.2019.116553

Cited by 22 publications

(3 citation statements)

References 31 publications

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“…Formability tests for 5A06, 2B06 and 2024 aluminum alloy sheets were performed using our self-developed IHF equipment [45,73]. The experimental results showed that the forming limit of the tested aluminum alloys were greatly improved under IHF [74]. Further, we established the quantitative relationships between impact energy and the maximum forming height of aluminum alloys and discovered that the limit deep drawing ratio increased by 5.21% compared with that under conventional deep drawing to 2B06 aluminum alloy.…”

Section: Formability At Room Temperaturementioning

confidence: 99%

Deformation Characteristics, Formability and Springback Control of Titanium Alloy Sheet at Room Temperature: A Review

Chen

Zhang

et al. 2022

Materials

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Titanium alloy sheets present inferior formability and severe springback in conventional forming processes at room temperature which greatly restrict their applications in complex-shaped components. In this paper, deformation characteristics and formability and springback behaviors of titanium alloy sheet at room temperature are systematically reviewed. Firstly, deformation characteristics of titanium alloys at room temperature are discussed, and formability improvement under high-rate forming and other methods are summarized, especially the impacting hydroforming developed by us. Then, the main advances in springback prediction and control are outlined, including the advanced constitutive models as well as the optimization of processing paths and parameters. More importantly, notable springback reduction is observed with high strain rate forming methods. Finally, potential investigation prospects for the precise forming of titanium alloy sheet in the future are suggested.

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Section: Formability At Room Temperaturementioning

confidence: 99%

Deformation Characteristics, Formability and Springback Control of Titanium Alloy Sheet at Room Temperature: A Review

Chen

Zhang

et al. 2022

Materials

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“…More experimental work needs to be carried out to verify the change of formability for this aluminum alloy sheet. Recently, aimed at the impact hydroforming process, one novel method was proposed by Chen et al [21] to evaluate the formability of sheet metals under high strain rate condition. The novel forming limit curve was obtained based on the experimental data and it related to the impact energy and deep drawing ratio.…”

Section: Introductionmentioning

confidence: 99%

Strain-Rate Effect on Anisotropic Deformation Characterization and Material Modeling of High-Strength Aluminum Alloy Sheet

Zhang

et al. 2022

Metals

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Aluminum alloy sheets are widely applied as structure components in automotive, aircraft and other industries to realize lightweight. Nowadays, many high strain rate forming techniques have been developed to improve their formability and widen their application. To ensure the reliability of the aluminum alloy structure components under high strain rate conditions, it is imperative to develop a thorough understanding of the alloy’s mechanical properties. In this paper, taking high-strength 6XXX aluminum alloy sheet as an example, the anisotropic deformation characterization and corresponding material models at various strain-rate conditions are investigated systematically. The material hardening curves and anisotropic plastic yielding stresses were achieved based on the quasi-static uniaxial tensile test and the split Hopkinson tensile bar tests. In this study, the Johnson–Cook hardening model and two anisotropic yield functions are applied to well describe the strain-rate-dependent anisotropic plastic deformation behavior. In addition, the fractographic characterization of the fractured samples at various strain-rate conditions are measured and compared. The study systematically investigates the influence of strain rate on the anisotropic deformation behavior of the high-strength aluminum alloy sheets and gives the basic experimental data for their application in engineering fields in the future.

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“…However, the strain rates on the materials reach up to 10 3 s −1 . In recent years, high-speed forming has been a widely used room-temperature plastic deformation technology for manufacturing thin-walled and complex-shaped components [2][3][4], as well as for the production of modern types of materials, such as laminates, composites, and hybrid materials [5][6][7]. Processes of plastic forming characterised by dynamic plastic deformations at (ultra) high strain rates from 10 2 s −1 to 10 6 s −1 , such as high-speed forming (e.g., rotary swaging), impact hydroforming, pneumo-mechanical forming, electromagnetic forming, etc., have also become very popular [8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test

et al. 2021

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Tristal steel is low-carbon construction-type steel widely used in the automotive industry, e.g., for braking components. Given the contemporary demands on the high-volume production of such components, these are typically fabricated using automatic sequential machines, which can produce components at strain rates up to 103 s−1. For this reason, characterising the behaviour of the used material at high strain rates is of the utmost importance for successful industrial production. This study focuses on the characterisation of the behaviour of low-carbon steel via developing its material model using the Johnson-Cook constitutive equation. At first, the Taylor anvil test is performed. Subsequently, the acquired data together with the results of observations of structures and properties of the tested specimens are used to fill the necessary parameters into the equation. Finally, the developed equation is used to numerically simulate the Taylor anvil test and the predicted data is correlated with the experimentally acquired one. The results showed a satisfactory correlation of the experimental and predicted data; the deformed specimen region featured increased occurrence of dislocations, as well as higher hardness (its original value of 88 HV increased to more than 200 HV after testing), which corresponded to the predicted distributions of effective imposed strain and compressive stress.

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A novel method to evaluate the high strain rate formability of sheet metals under impact hydroforming

Cited by 22 publications

References 31 publications

Deformation Characteristics, Formability and Springback Control of Titanium Alloy Sheet at Room Temperature: A Review

Deformation Characteristics, Formability and Springback Control of Titanium Alloy Sheet at Room Temperature: A Review

Strain-Rate Effect on Anisotropic Deformation Characterization and Material Modeling of High-Strength Aluminum Alloy Sheet

Determining Johnson-Cook Constitutive Equation for Low-Carbon Steel via Taylor Anvil Test

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