Dynamic Molding Process for Powder Material using Compression Shearing Method

Abstract

A new method of solidifying metal powder by the compression and shearing method under room temperature was developed. In the solidified specimen, recrystallization is suppressed, so that the nano-scale crystal grains are remaining. The hardness of the solidified specimen prepared by this process is increased relative to materials prepared by other methods. During the process, metal powders are solidified by the enforced plastic flow and the external heating is not required. The direct molding from powder is the industrially effective technique from the viewpoint of productivity improvement.In this study, the alloying process of the dissimilar metal joint using compression shearing method at room temperature was investigated. Joint material of copper (Cu), aluminum (Al) and zinc (Zn) was molded, and the crystal and the mechanical characteristics were evaluated. The bonding property between different kind of metals by the compression and shearing method under room temperature and the possibility of the machine part application of the composite were discussed.