Transactions of Materials and Heat Treatment

Title：Experiment study on springback of TC4 titanium alloy sheet part with large curvature radius by impact hydroforming based on response surface method

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ClassificationCode：TG386

year,vol(issue):pagenumber：2022,47(7):80-85

Abstract：

For TC4 titanium alloy sheet part with large curvature radius, the experiment was designed based on the response surface method and the impact hydroforming springback experiment study on parts was carried out. Then, the evaluation index used to describe the springback of parts with large curvature radius was developed, and the springback amount of TC4 titanium alloy sheet under different process parameters was obtained. Furthermore, the influence laws of air pressure, blank holder force and dies with different curvature radius on the springback amount of TC4 titanium alloy sheet in impact hydroforming were studied, and the response model of springback amount was established to obtain the optimal process parameters combination. The results show that compared with quasi-static forming, the impact hydroforming can significantly reduce the springback amount of titanium alloy sheet parts. At the same time, it is found that the springback amount decreases with the increasing of air pressure and curvature radius of die, and the influence of blank holder force on the springback amount is not obvious. In addition, the negative springback occurs when the air pressure exceeds a certain value, and the greater the curvature radius of die is, the greater the absolute value of negative springback is, but the greater the blank holder force is, the smaller the absolute value of negative springback is.

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作者简介：岳峰丽（1970-），女，硕士，副教授 E-mail：462627600@qq.com 通信作者：马彦（1983-），男，博士，助理研究员 E-mail：yma@imr.ac.cn

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