Abstract
A novel heat assisted microbending system was developed by applying the resistance heating technology. To clarify the effect of heating on springback for ultra-thin metal foils, high precision microbending test was carried out under the different temperature of room temperature (RT), 300oC and 600oC. As-received rolled and electrochemically polished pure titanium foils with thickness of 0.1, 0.05 and 0.02mm were used. To evaluate the springback in each thickness, springback angle of pure titanium foils with different thicknesses was measured under the same maximum bending strain. As results, the springback angle was decreased with increasing the process temperature for all materials and thickness conditions. Furthermore, the thinner the foil, the larger the springback angle, irrespective of the temperature conditions. The relationship between the heating temperature and the decreasing ratio of the springback angle was experimentally demonstrated.
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