Predicting forming limit diagrams for AZ31 magnesium alloy and 7050 aluminum alloy by numerical simulation

Xue, Fei; Yan, Yu; Kang, Jincheng

doi:10.1177/0309324720981202

Cited by 3 publications

(3 citation statements)

References 38 publications

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“…The AA7050 Al alloy presents relatively lower formability at room temperature with FLD o close to 0.06–0.13, as examined by Xue et al [ 31 ] by numerical simulations and Pishyar et al [ 39 ] using Nakazima‐type tests. In the present work, the multilayered sheets roll bonded at 500 °C presented an FDL o of 0.11 (see Figure 6), which is in the range of formability for monolithic AA7050 sheets after artificial aging or overaging.…”

Section: Discussionmentioning

confidence: 95%

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The Effect of Preheating Temperature on the Forming Limit Diagram of AA1050/AA7050 Al Multilayered Sheets Produced by Accumulative Roll Bonding (ARB)

et al. 2022

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Multilayered sheets of AA1050 and AA7050 Al alloys produced by hot accumulative roll bonding (ARB) are tested to estimate their forming limit diagrams (FLDs). Sheets processed with preheating at 450 and 500 °C for up to six ARB cycles are submitted to Nakazima tests with an in situ digital image correlation system and tensile tests to analyze the mechanical behavior. X‐ray measurements and electron backscatter diffraction are performed to obtain the crystallographic texture and the mesotexture, respectively, and thus characterize the heterogeneous microstructure. A bimodal grain size distribution is observed in these sheets since AA7050 layers present elongated and fine grain size with nanometric precipitates and AA1050 layers present coarser and equiaxed grains. In addition, texture analysis indicates both rolling and shear components in the sheets. The FLDs show that the forming properties did not follow the expected rule of mixtures when compared with monolithic alloy sheets. Overall, the multilayered AA1050/AA7050 processed by means of ARB at 500 °C presents better formability than that at 450 °C, due to the combination of lower anisotropy measured by the Lankford coefficients values close to 1 and low normal anisotropy Δr values.

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Section: Discussionmentioning

confidence: 95%

“…The FLD plots for monolithic sheets were added for the sake of comparison in Figure 6. [24,31] Figure 7 shows the broken specimens after Nakazima tests, showing that fractures were located along the dome apex as the lubrication system was efficient.…”

Section: Mechanical Properties Of the Aa1050/aa7050 Multilayered Sheetsmentioning

confidence: 99%

The Effect of Preheating Temperature on the Forming Limit Diagram of AA1050/AA7050 Al Multilayered Sheets Produced by Accumulative Roll Bonding (ARB)

et al. 2022

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“…This interesting approach yielded a good agreement with the experimental measurements. A similar approach is adopted by Xue et al 11 with the difference that maximum punch force is adopted as the criterion to indicate the onset of instability. These works are beneficial in that no preexisting flaw is introduced in the initial configuration of the specimen, whether geometrically or by weaker material properties, as opposed to other works.…”

Section: Introductionmentioning

confidence: 99%

Generalized phenomenological model to analyze the forming limit curve of Al 1050

Anbaran

Lotfabad

Ebrahimi

et al. 2023

The Journal of Strain Analysis for Engineering Design

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In this investigation, the previously proposed phenomenological model in the literature is generalized both in terms of the mathematical form of the model and the yield function used to describe the plasticity of the material. Al 1050 is chosen as the model material, where the sheets made from this material are first annealed and then subjected to a tensile test and Erichsen cupping test to obtain tensile properties as well as the FLC of the material. The constants of the generalized model are first obtained by curve fitting, whereby in this approach least overall error is expected as a single equation is used to predict the FLC of material. Further, it is shown that it would be possible to enhance the accuracy of the model at the cost of losing the applicability of a single mathematical expression for both branches of FLC. In this approach, the generalized model would be calibrated for the right branch based on Swift’s model and for the left branch based on Hill’s model. Finally, the effect of the yield criterion used to describe the plasticity of the material on the predictions of the generalized model is investigated, and it is shown that using the Hosford yield criterion yields better results compared to using the von Mises yield criterion.

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Predicting the fracture forming limit of 5754-O aluminum alloy by finite element simulation

Yan,

Zhang,

Liu

et al. 2024

Mater. Res. Express

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Aluminum alloy has the advantages of low specific gravity, easy processing and good welding performance, so it is widely used on automobile to achieve lightweighting. Forming limit diagram (FLD) is the most intuitive method for evaluating and analyzing the forming performance of aluminum alloys. Standard forming limit tests are complex and costly. To simplify test procedures of the formability of 5754-O aluminum alloys, three tests including uniaxial tensile, deep drawn cup and dome stretching tests are established through ABAQUS finite element software. The principal and secondary strain values at the time of fracture were extracted to construct the forming limit curve at fracture (FLCF). In order to verify the accuracy of the simulation results, corresponding experiments are conducted. The experimental results match the finite element simulation results, verifying the accuracy of the finite element simulation. The method presented in this paper can predict the formability of aluminum alloy quickly.

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Predicting forming limit diagrams for AZ31 magnesium alloy and 7050 aluminum alloy by numerical simulation

Cited by 3 publications

References 38 publications

The Effect of Preheating Temperature on the Forming Limit Diagram of AA1050/AA7050 Al Multilayered Sheets Produced by Accumulative Roll Bonding (ARB)

The Effect of Preheating Temperature on the Forming Limit Diagram of AA1050/AA7050 Al Multilayered Sheets Produced by Accumulative Roll Bonding (ARB)

Generalized phenomenological model to analyze the forming limit curve of Al 1050

Predicting the fracture forming limit of 5754-O aluminum alloy by finite element simulation

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