The effects of local heating on springback behaviour in v bending of galvanized DP600 sheet

ABSTRACTThe effects of local heating temperature and bending parameters on the formability and springback in the V-bending of galvanized DP600 sheet material are investigated experimentally. In the study, the experiment parameters are determined as temperature (Room Temperature-RT, 100, 200, 300, 400 and 500 °C), die angle (15, 30, 45, 60 and 75) and holding time (0, 10 and 20 sec.). It was observed that there were radical changes in springback angles and formability due to the martensite changes in the microstructure of the material between the temperatures of RT – 500 °C. It was noted that the springback angle increased by 27.46% on average when the heating temperature increased from RT up to 200 °C, decreased by 16.28% on average when the heating temperature increased from 200 °C up to 400 °C, and increased by 22.72 % on average when the heating temperature increased from 400 °C up to 500 °C.