Large deformation of magnesium sheet at room temperature by preform annealing, part II: “Bending”

Habibnejad-korayem, Mahdi; Jain, Mukesh; Mishra, Raja K.

doi:10.1016/j.msea.2014.09.096

Cited by 18 publications

(4 citation statements)

References 12 publications

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“…The elastic strain region is defined as the strain neutral layer. However, many reports only considered the stress component in the LD [37][38][39][40][41] and ignored the stress components in the TD and ND. The stress state in the bending sample is much more complex than that of uniaxial tension or compression.…”

Section: Simulated Resultsmentioning

confidence: 99%

Unusual Spreading of Strain Neutral Layer in AZ31 Magnesium Alloy Sheet during Bending

Liu

Bai

et al. 2022

Materials

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In this work, we reported an unusual phenomenon of strain neutral layer (SNL) spreading in an as-rolled AZ31B magnesium alloy sheet during V-bending. The SNL on the middle symmetrical surface perpendicular to the transverse direction (TD) of the sheet extended to the compression region and was accompanied by a mound-like feature. However, the SNL on the side surface perpendicular to the TD was distributed with a parallel band feature. The underlying mechanism was revealed by the finite element (FE) analysis. The results indicate that the three-dimensional compressive stresses in the compression region of the bending samples were responsible for the above phenomenon. Moreover, the area of the SNL in the middle position gradually decreased as the bending test progressed. The findings in this study provide some new insights into the bending deformation behavior of magnesium alloy.

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Section: Simulated Resultsmentioning

confidence: 99%

Unusual Spreading of Strain Neutral Layer in AZ31 Magnesium Alloy Sheet during Bending

Liu

Bai

et al. 2022

Materials

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“…Thus, it can be stated that there must be considerably complex deformation behavior during the bending process of the FSW Mg joint. To date, there are some reports [18][19][20][21][22] about the deformation behavior and microstructure evolution of Mg alloy plates during the bending process, but the research on the bending test of FSW Mg joints is very lacking. Therefore, it is necessary to reveal the relationship between the joint texture distribution and the joint mechanics and deformation behavior under this complex stress.…”

Section: Introductionmentioning

confidence: 99%

Deformation Characterization, Twinning Behavior and Mechanical Properties of Dissimilar Friction-Stir-Welded AM60/AZ31 Alloys Joint During the Three-Point Bending

Zhang

Han

Chen

et al. 2021

Acta Metall. Sin. (Engl. Lett.)

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The AZ31 and AM60 alloys were used for dissimilar friction stir welding (FSW) in this study. The microstructure characteristics of the joint and its three-point bending performance were investigated. The electron backscattered diffraction results showed that the grains in the nugget zone (NZ) were more uniform and refined to a certain extent after FSW, but the grain size of AM60 in the NZ was larger than that of AZ31. The texture was strong locally in the NZ and presented a symmetric distribution characteristic from the advancing side to the retreating side. There were special texture features in the joint, resulting in the occurrence of severe strain localization during the bending process compared with the base materials, which can be well explained by the calculated Schmid factor in terms of the assumed stress state for bending. The bending tests revealed that the joint presented good bending properties compared with AZ31 BM. The bending fracture morphologies suggested that the fracture tended to the NZ interface on the AZ31 side, which was mainly due to the higher SF for basal slip and dislocation concentration degree in the region, and the relatively lower bending strength of AZ31 metal.

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“…The plane strain deformation mode is critical for sheet metal forming since it has the lowest value on the forming limit curve [22]. In other words, the sheet metal is fractured at relatively smaller deformation strain levels compared with the other deformation modes, when it is subjected to the plane strain condition, such as pure bending [23,24]. In pure bending, there is a steep gradient of stress/strain distribution across the sample thickness and the deformation modes, such as twinning, can be complicated.…”

Section: Introductionmentioning

confidence: 99%

Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method

Stoica

et al. 2018

Crystals

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The tensile twinning and detwinning behaviors of a wrought magnesium alloy have been investigated during in situ four-point bending using the state-of-the-art high spatial resolution pinhole neutron diffraction (PIND) method. The PIND method allowed us to resolve the tensile twinning/detwinning and lattice strain distributions across the bending sample during a loading-unloading sequence with a 0.5 mm step size. It was found that the extensive tensile twinning and detwinning occurred near the compression surface, while no tensile twinning behavior was observed in the middle layer and tension side of the bending sample. During the bending, the neutral plane shifted from the compression side to the tension side. Compared with the traditional neutron diffraction mapping method, the PIND method provides more detailed information inside the bending sample due to a higher spatial resolution.

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Large deformation of magnesium sheet at room temperature by preform annealing, part II: “Bending”

Cited by 18 publications

References 12 publications

Unusual Spreading of Strain Neutral Layer in AZ31 Magnesium Alloy Sheet during Bending

Unusual Spreading of Strain Neutral Layer in AZ31 Magnesium Alloy Sheet during Bending

Deformation Characterization, Twinning Behavior and Mechanical Properties of Dissimilar Friction-Stir-Welded AM60/AZ31 Alloys Joint During the Three-Point Bending

Bending Behavior of a Wrought Magnesium Alloy Investigated by the In Situ Pinhole Neutron Diffraction Method

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