TY - JFULL AU - Xi Yang and Bulent Chavdar and Alan Vonseggern and Taylan Altan PY - 2015/3/ TI - Prediction and Reduction of Cracking Issue in Precision Forging of Engine Valves Using Finite Element Method T2 - International Journal of Mechanical and Mechatronics Engineering SP - 265 EP - 272 VL - 9 SN - 1307-6892 UR - https://publications.waset.org/pdf/10000478 PU - World Academy of Science, Engineering and Technology NX - Open Science Index 98, 2015 N2 - Fracture in hot precision forging of engine valves was investigated in this paper. The entire valve forging procedure was described and the possible cause of the fracture was proposed. Finite Element simulation was conducted for the forging process, with commercial Finite Element code DEFORMTM. The effects of material properties, the effect of strain rate and temperature were considered in the FE simulation. Two fracture criteria were discussed and compared, based on the accuracy and reliability of the FE simulation results. The selected criterion predicted the fracture location and shows the trend of damage increasing with good accuracy, which matches the experimental observation. Additional modification of the punch shapes was proposed to further reduce the tendency of fracture in forging. Finite Element comparison shows a great potential of such application in the mass production. ER -