The stress states of a workpiece in the process of liquid-metal forging

In this paper the authors analyze the stress states of a workpiece in the process of liquid-metal forging, on the basis of numerous experiments. Schematic diagrams of the stress state in every stage for two conditions (i.e., insufficient pressure and sufficient pressure) are given, which reveal that the stress state in a workpiece changes continuously in order that plastic deformation can continue. The results of the analysis have been examined by carrying out engineering calculations, which has indicated that the results are practical and correct for engineering purposes.