3Wu C Y, Hsu Y C. Optimal shape design of an extrusion die using polynomial network and genetic algorithm [J]. The International Journal of Advanced Manufacturing Technology, 2002, (2).. 79-87.
4Cockcroft M G, Latham D J. Ductility and the workability of metals [J]. Journal of the Institute of Metals. 1968, (96): 33 - 39.
5Esa Ervasti,Ulf Stahlberg. A quasi-3D method used for increasing the material yield in closed-die forging of a front axle beam[J].Journal of Materials Processing Technology,2005.119-122.
6Victor Vazquez,Taylan Altan. Die design for fleshless forging of complex parts[J].Journal of Materials Processing Technology,2000.81-89.
7Grass H,Krempaszky C,Reip T. 3-D Simulation of hot forming and microstructure evolution[J].Computational Materials Science,2003.469-477.