Combined numerical and experimental study to predict the forming limit curve of boron steel sheets at elevated temperatures

Nguyen, Duc-Toan; Kim, Young-Suk

doi:10.1177/0954405419843783

Cited by 7 publications

(3 citation statements)

References 40 publications

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“…Additionally, a combined numerical and experimental method has been proposed for obtaining FLDs at elevated temperatures. 40 For this research, the Nakazima test, one of the most common experimental methods, was selected. In this test, the initial samples are placed in a die and then are punched.…”

Section: Introductionmentioning

confidence: 99%

Forming limit diagrams and mechanical properties of AA1050/Ti CP2 multilayered composite produced by the accumulative roll bonding technique

Hosseini

Hashemi

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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In this study, the AA1050/Ti CP2 metallic multilayered composite was produced by accumulative roll bonding (ARB) using AA 1050 and commercially pure titanium Ti (CP-Ti ASTM grade 2) for three cycles at ambient temperature. The microstructure evolution was investigated by scanning electron microscopy (SEM) equipped with an energy dispersive spectrometer (EDS) and X-ray diffraction (XRD). Also, the tensile test and Vickers microhardness measurement were conducted to evaluate mechanical properties. The forming limit diagrams (FLD) were obtained for a metallic multilayered composite for the first time by the Nakazima test. It was observed that a continuous and well-bonded composite was fabricated after the first cycle. For the subsequent two cycles, necking and fracture of Ti reinforcement occurred in the Al matrix. The maximum tensile strength was reached after two cycles with almost a 98% increase compared to the annealed aluminum sample. However, the tensile strength was reduced after the third cycle. The uniform elongation considerably decreased after the first cycle and was maintained for the subsequent two cycles. The microhardness improved by 124% and 47% for Al and Ti, respectively, in the whole process of ARB in comparison with annealed Al and Ti. As a formability criterion, the level of forming limit curve (FLC) was reduced sharply after the first ARB cycle. For subsequent cycles, this reduction was neglectable. The Al/Ti composite fracture surfaces were a combination of shear ductile and brittle after the third pass.

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Section: Introductionmentioning

confidence: 99%

Forming limit diagrams and mechanical properties of AA1050/Ti CP2 multilayered composite produced by the accumulative roll bonding technique

Hosseini

Hashemi

2022

Proceedings of the Institution of Mechanical Engineers, Part B:

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“…13,14 The forming limit diagram (FLD) is applied to investigate the limit of major and minor strains that the sheet can tolerate without any necking. 15–17 Many types of research have been done to study the explosive welded sheets. 11 Acarer et al 18 studied the effects of the anvils, explosive loading and stand-off distance parameters on the explosive welding process of similar metals (steel-steel plates) under untreated and heat-treated situations.…”

Section: Introductionmentioning

confidence: 99%

Investigation of forming limit diagram and mechanical properties of the bimetallic Al/Cu composite sheet at different temperatures which fabricated by explosive welding

Alaie

Hashemi

Kazemi

2020

Proceedings of the Institution of Mechanical Engineers, Part B:

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This research aims to investigate the mechanical properties, fractography and formability of Al/Cu two-layer composite sheets at three temperatures (23 °C, 120 °C and 220 °C). The bimetal sheet was fabricated by the explosive welding method. The anisotropy of the Al/Cu bimetallic composite sheet was investigated. The result showed significant anisotropy in the Al/Cu composite sheet due to the explosive welding process. The Vickers hardness measurements demonstrated that the hardness in both aluminum and copper sides increased because of the work hardening phenomenon. The fractography of the surfaces was investigated by the scanning electron microscope after tensile tests to study the effect of temperature and the direction, which the samples prepared for the tensile test with respect to the explosion direction, on the mechanism of the fracture. For the tensile test, the samples were prepared parallel to the detonation direction [Formula: see text] and two other directions with respect to the explosion direction [Formula: see text] from the AA1100/Cu10100 bimetallic sheet. Finally, the forming limit diagram of the Al/Cu composite sheet was determined at the three mentioned temperatures. The results demonstrated that temperature and the direction had a considerable effect on the mechanism of the rupture and formability. As the temperature of the specimen rises, the regions that brittle fracture happened became less and the formability improved significantly. The formability of the Al/Cu composite sheet enhanced about 34.8% when the temperature increased from 23 °C to 120 °C and 67.5% when it increased from 120 °C to 220 °C.

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“…Shao et al 18 studied the deformation feature of AA5754 aluminum alloy at a warm forming temperature range of 200°C–300°C and figured out that warm forming processes at high temperature and relatively low forming speed will be beneficial for work-piece formability. Duc et al 19 evaluated and predicted forming limit curves of boron steel 22MnB5 sheet at elevated temperatures by employing ductile fracture criterions of Johnson–Cook ductile and void growth models. Hu and Pan 20 experimentally investigated the forming performance of AZ31B magnesium alloy sheet in the process of pulsating hydroforming.…”

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confidence: 99%

Modeling of constitutive behavior and ductile fracture of AA5A06 aluminum alloy sheet in warm hydroforming process

Kangning,

Mingnan,

Han

et al. 2023

Proceedings of the Institution of Mechanical Engineers, Part B:

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In order to predict the formability of lightweight materials, the flow stress and fracture behavior of AA5A06 aluminum alloy which is very sensitive to temperature and strain-rate were investigated in this study. First, a modified Misiolek constitutive equation with a work-soften term is proposed to calculate the flow stress of the sheet metal. To predict ductile fracture in sheet forming operations, Cockcroft-Latham damage criterion is applied here and ductile fracture threshold under each condition is estimated using Response Surface Method. Finally, warm hydroforming deep drawing tests were conducted at various conditions and the experiment results are compared with the numerical simulation result to evaluate the new model’s feasibility and accuracy in forecasting the mechanical response of the material in warm forming conditions. Results show that the proposed model has a good accuracy compared with the traditional power law models and the FEM simulation conforms well to the tests.

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Combined numerical and experimental study to predict the forming limit curve of boron steel sheets at elevated temperatures

Cited by 7 publications

References 40 publications

Forming limit diagrams and mechanical properties of AA1050/Ti CP2 multilayered composite produced by the accumulative roll bonding technique

Forming limit diagrams and mechanical properties of AA1050/Ti CP2 multilayered composite produced by the accumulative roll bonding technique

Investigation of forming limit diagram and mechanical properties of the bimetallic Al/Cu composite sheet at different temperatures which fabricated by explosive welding

Modeling of constitutive behavior and ductile fracture of AA5A06 aluminum alloy sheet in warm hydroforming process

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