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        Experimental study and numerical simulation on springback of Ti-6Al-4V alloy under hot U-bending

        Fen-Qiang Li,Jishuai Jiang,Juemei Wang,Jinguo Wang,Xinyu Chen 대한기계학회 2023 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.37 No.7

        In this study, springback of Ti-6Al-4V sheet subjected to hot bending was investigated experimentally and by numerical simulation. The experiment determined the relative effects of forming temperature, forming speed and holding time on springback during hot bending of the alloy sheet. Distribution of temperature and equivalent stress fields experienced during hot bending were predicted by thermal-mechanical coupling numerical simulation. Analysis of the mutual influence of deformation and temperature was conducted using finite element modeling in DYNAFORM software. The results indicated that increased forming temperature, forming speed and holding time each reduced springback to a degree. Forming temperature had the greatest influence in limiting springback, followed by forming speed and holding time, the latter of which was of minor significance. The thermomechanical coupling numerical model is reliable and the predicted temperature field distribution was confirmed.

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