Forming Limit and Mechanical Properties of 2024-O Aluminum Alloy Under Electromagnetic Forming

Yuhong Lin; Xiaohui Cui; Kanghua Chen; Ang Xiao; Ziqin Yan

doi:10.1007/s12540-021-01128-x

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자료유형: 학술저널

저자정보: Yuhong Lin (Central South University) Xiaohui Cui (Central South University) Kanghua Chen (Central South University) Ang Xiao (Central South University) Ziqin Yan (Central South University)

저널정보: 대한금속·재료학회 Metals and Materials International Metals and Materials International Vol.28 No.10

발행연도: 2022.10

수록면: 2,472 - 2,482 (11page)

DOI: 10.1007/s12540-021-01128-x

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The effect of electromagnetic forming (EMF) on the forming limit and properties of 2024-O aluminum alloy is studied in thispaper. This was done to address the important problems related to the poor forming limit of aluminum alloy when conventionalstamping is used. The evolution of the microstructure of the alloy during quasi-static stamping (QS) and the dynamicdeformation is analyzed. This was done using mechanical testing, texture analysis, scanning electron microscopy (SEM),fracture analysis, and transmission electron microscopy (TEM). Compared with QS, the forming limit for EMF increases by36.9%. For the same deformation height with 17.6mm, the maximum degree of thickness thinning of the sample for EMF is4.7%, and 6.4% for QS. The thickness distribution of the EMF sample is more uniform than for the QS sample. Numericalsimulation shows the maximum principal stresses at different points were almost same with each other after EMF, whichleads to uniformity plastic deformation of samples. In addition, the grain size of the material decreases, the proportion ofsmall-angle grains increases, and the copper texture increases after EMF. When EMF is used, the dislocation density of thesample is significantly higher than for QS and the dislocation distribution is more uniform. The temperature rise is small,which is not a significant reason for dislocation dispersed in EMF.

#Electromagnetic forming · Aluminum alloy · Deformation uniformity · Dislocation · Texture

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