Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental verification on deformation uniformity during forging-cogging process for aluminum alloy

Authors： Li Pengwei Li Yirui Cai Anhui Wang Xin Zhou Hongzhi

Unit： Hunan Institute of Science and Technology Hunan Engineering Research Center of Innovative Design and Manufacturing of Complex Structure Topology Key Laboratory of Electromagnetic Equipment Design and Manufacturing of Hunan Province

KeyWords： forging-cogging deformation uniformity multi-directional upsetting grain refinement 2A14 aluminum alloy

ClassificationCode：TG31

year,vol(issue):pagenumber：2022,47(8):1-6

Abstract：

Deformation uniformity of forging-cogging is an important factor affecting the quality of forgings. Therefore, for 2A14 aluminum alloy, the strain field of forged-billet was simulated by finite element software Deform-3D. Then, by introducing average equivalent strain εave and deformation uniformity coefficient a, combined with the observation of grain morphology and

the tensile test of mechanical properties, the deformation uniformity of “unidirectional upsetting” and “multi-directional upsetting” forging-cogging processes were quantitatively and qualitatively analyzed. The results show that the deformation uniformity of the “multi-directional upsetting” forging-cogging process is better than that of the “unidirectional upsetting” forging-cogging process, and the larger the accumulated strain amount is, the better the deformation uniformity and the weaker the anisotropy of mechanical properties are. In the process of multi-directional upsetting forging-cogging process for 2A14 aluminum alloy, with the increasing of accumulated strain amount, the grain refinement mechanism gradually changes from the grain crushing mechanism to the continuous dynamic recrystallization mechanism.

Funds：

湖南省自然科学基金青年项目（2020JJ5215）；电磁装备设计与制造湖南省重点实验室开放基金项目（DC202007）

作者简介：李鹏伟（1985-），男，博士，讲师，E-mail：mselpw@163.com；通信作者：周宏志（1972-），男，博士，教授，E-mail：zhoubox@sina.com

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