Development of partial modification technology of structures based on visualization of the solid phase flow phenomenon

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A new technology in which the characteristics of a part of a structure are significantly improved by one process, has been developed. In this method, the properties are improved at any place for any materials in a very short period. After manufacturing a large-sized structure using a material with a sufficient formability, arbitrary places can be strengthened with this technique to maintain the mechanical properties of the whole structure.For "stirring-dispersion", the three-dimensional solid phase flow visualization system has been developed using two X radiation sources in order to directly observe the flow in aluminum and ferrous alloys. Thereby, the defect formation mechanism was clarified and the process was optimized.