Abstract Electromagnetically assisted sheet metal stamping (EMAS) is one of promising forming methods for aluminum alloys. In this study, tensile properties of AA5182 aluminum alloys in combined quasi static-dynamic tensile processes were investigated. Special specimens were designed to create uniaxial tension state under electromagnetic forming processes. The specimens were firstly pre-stretched to several degrees, and then were subjected to electromagnetic uniaxial tension experiments. The final strains of combined quasi static-dynamic tensile specimens were tested. Microscopic experiments were also conducted to reveal the enhancement mechanism of formability for AA5182 in combined forming processes. Results showed that quasi static pre-deformation would not affect dynamic tensile properties. AA5182 sheets were insensitive to the micro defects caused by quasi-static deformation, causing that finial elongation of combined quasi static-dynamic tensile specimens was larger than pure dynamic specimens. This would enable AA5182 quasi-static pre-form degree close to the quasi-static material limits for design of an EMAS process without sacrifice the overall formability.

中文翻译：

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AA5182铝板成形性准静态-动态联合拉伸工艺研究

摘要 电磁辅助钣金冲压（EMAS）是一种很有前景的铝合金成形方法。在这项研究中，研究了 AA5182 铝合金在准静态-动态联合拉伸过程中的拉伸性能。特殊试样被设计成在电磁成形过程中产生单轴拉伸状态。试件首先被预拉伸到几度，然后进行电磁单轴拉伸实验。测试组合准静态-动态拉伸试样的最终应变。还进行了显微实验，以揭示 AA5182 在组合成形过程中的成形性增强机制。结果表明，准静态预变形不会影响动态拉伸性能。AA5182板材对准静态变形引起的微观缺陷不敏感，导致准静态-动态拉伸试样的最终伸长率大于纯动态试样。这将使 AA5182 准静态预成型程度接近用于 EMAS 工艺设计的准静态材料限制，而不会牺牲整体可成型性。