Investigation of microstructure and texture during continuous bending of rolled AZ31 sheet by experiment and FEM

Ning, Fangkun; Zhou, Xiong; Le, Qichi; Li, Xiaoqiang; Ma, Lifeng; Wang, Jia

doi:10.1016/j.jmrt.2019.10.017

Cited by 16 publications

(3 citation statements)

References 23 publications

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“…This is because metal plates are plastically deformed along straight lines, which change their shape during bending, and they are generally used by trial and error. However, bending operations' precision and achievement depend on operating parameters, properties of material, and the investigation of microstructure and texture during continuous bending of rolled AZ31 sheet by experiment and FEM [14], [15].…”

Section: Introductionmentioning

confidence: 99%

Spring-Back Analysis of the Vee Bending Process for High-Strength Stainless Steel

et al. 2023

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This study discussed the evaluation of bending process using high-strength SUS 304 (HS-SUS-304) material of high degree tolerances, and its application in a safe, strongbox, and strongroom protection system. This bending process is one of the several material-forming techniques widely used in the manufacturing industry. Moreover, incorrectly selected parameters such as the V-die punch radius, the angle of V-die bending, and the angle of machine parameters often leads to material failure and wrong final dimensions. The V-bending process was chosen for evaluation because it exhibits significant spring-back effect and has a wide range of industrial applications. The experimental method utilized HS-SUS 304 with a thickness of 3.0 mm that meets the ASTM A-240 requirement, and the input parameters used for V-die angle as well as tip punch radius were chosen in order to achieve the 90o ± 0.5o, and 50o ± 0.5o degrees of the workpieces. The V-die angle of 89o was selected with a tip punch radius of 1.0 mm and 1.2 mm. Furthermore, the spring-back effect was analyzed and evaluated to meet the standard angle requirement, and the results showed that the settings on the bending machine need to be adjusted to achieve angles within tolerances of degrees. It was observed that when the process bend angles on the machine was set at 93.75o and 52.83o with 1.0 mm V-dies tip punch radius, the spring-back factor results produce an average of 0.9609, 0.9618, and 0.9600. Meanwhile, this average increased to 0.9634, 0.9641, and 0.9655, by using 1.2 mm.

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Section: Introductionmentioning

confidence: 99%

Spring-Back Analysis of the Vee Bending Process for High-Strength Stainless Steel

et al. 2023

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“…Therefore, bendability is an essential indicator that represents the formability of Mg alloy sheets. The evaluation and improvement of the bendability of Mg alloy sheets has attained adequate attention [15][16][17][18][19][20][21].…”

Section: Introductionmentioning

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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“…Magnesium alloy is the lightest metal structural material in actual engineering, with light specific gravity, high specific strength, excellent thermal and electrical conductivity [ 1 , 2 , 3 , 4 , 5 , 6 ], and the mechanical properties of rolled magnesium alloys are better than those of cast magnesium alloys. Therefore, magnesium alloy rolled sheets are widely used in automobiles, aerospace, and other fields.…”

Section: Introductionmentioning

confidence: 99%

Initiation and Suppression of Crack Propagation during Magnesium Alloy Rolling

et al. 2021

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The conventional rolling of magnesium alloy with a single pass and large reduction will cause severe edge cracking. The sheet without cracks can be achieved by limited width rolling. The microstructure evolution of the sheet with cracks after conventional rolling and the sheet without cracks after limited width rolling is explored, and an effective mechanism for solving edge cracks is proposed. Conventional rolling can fully develop twin evolution due to high deformation, and three stages of twinning evolution can be observed and the secondary twins easily become the nucleation points of micro cracks, resulting in a large number of cracks propagating along the twin lamellae. Cracks terminate at dislocation accumulation because the accumulation of a large number of dislocations can hinder propagation. Dislocation shearing of twins to eliminate the high localization caused by twins and induce the tensile twins to weaken the basal surface texture provides an effective plastic deformation mechanism of crack inhibition, which is useful for expanding the engineering application of magnesium alloy rolled sheets.

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Investigation of microstructure and texture during continuous bending of rolled AZ31 sheet by experiment and FEM

Cited by 16 publications

References 23 publications

Spring-Back Analysis of the Vee Bending Process for High-Strength Stainless Steel

Spring-Back Analysis of the Vee Bending Process for High-Strength Stainless Steel

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

Initiation and Suppression of Crack Propagation during Magnesium Alloy Rolling

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