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Investigation of Electrically-Assisted Rolling Process of Corrugated Surface Microstructure with T2 Copper Foil

机译:T2铜箔波纹表面微观结构的电辅助轧制工艺研究

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摘要

Electrically-assisted (EA) forming is a low-cost and high-efficiency method to enhance the formability of materials. In the study, EAF tensile tests are carried out to study the properties of T2 copper foil in an annealed state, and the effect of the electric current on the forming quality of corrugated foils is further studied in the EA rolling forming process. The result shows that the current reduces the flow stress and the fracture strain, which is different from the result of rolled samples. The joule heating effect on mechanical properties is significant in EA tension, and the softening effect of the surface layer can be observed at tensile strength, due to the grain size effect. Moreover, the current can weaken the grain size effect. In the rolling forming process, the influence of different electrical parameters on the forming height is remarkable, especially for the rolled T2 copper. The appropriate electrical parameters can improve the forming height, while keeping a small thickness thinning. Nevertheless, the high current density will lead to local rupture. This study proves that the current can improve the forming quality of the corrugated foils and is a promising surface texture forming process.
机译:电辅助(EA)成型是一种低成本,高效率的方法,可以增强材料的可成型性。在这项研究中,进行了EAF拉伸试验,以研究退火状态下T2铜箔的性能,并在EA滚压成型工艺中进一步研究了电流对波纹箔成型质量的影响。结果表明,电流减小了流动应力和断裂应变,这与轧制样品的结果不同。焦耳加热对机械性能的影响在EA张力中很重要,并且由于晶粒尺寸效应,可以在拉伸强度下观察到表面层的软化效果。此外,电流会减弱晶粒尺寸的影响。在压延成形过程中,不同的电参数对压延高度的影响非常明显,特别是对于轧制的T2铜。适当的电气参数可以提高成形高度,同时保持较小的厚度变薄。然而,高电流密度将导致局部破裂。这项研究证明,电流可以改善波纹箔的成型质量,是一种很有前途的表面纹理成型工艺。

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