Time-resolved in-situ analysis of phase evolution for the directional solidification of carbon steel weld metal |
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Authors: | H Terasaki Y Komizo M Yonemuira T Osuki |
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Affiliation: | (1) Joining and Welding Research Institute, Osaka University, 567-0047 Ibaraki, Osaka, Japan;(2) R&D Laboratories, Sumitomo Metals, HYOGO 660-0891 Amagasaki, Japan |
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Abstract: | Kinetic information about the phase transformation, during solidification process and solid-state transformation is essential
to the material processing, such as welding. In our research group, in-situ phase identification system consisting of undulator beam and imaging plate have recently been used. The welding torch is
driven by stepping-motor in the system. Those make possible that phase transformation can be identified in real-time under
the condition of directional solidification and the spatial resolution of 100 × 500 μm. The time-resolution is 0.3125 seconds.
In the present work, combination of analyzing method: the in-situ phase identification system, morphological observation by high-temperature laser scanning confocal microscopy and observation
of microstructure at room temperature by OM, SEM and micro diffraction-system, is suggested to analyze the phase transformation
during welding process. Phase transformation process of hypereutectoid carbon steel, during welding was analyzed as an example
of combination observation. |
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Keywords: | |
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