紀要論文

紀要論文

text

Transactions of JWRI. 2005, 34(2), p. 51-55

In-situ Observation of Steel Weld Solidification and Phase Evolution using Synchrotron Radiation

英語

text

2005-12

In order to understand the microstructure changes during welding processes , aiming to design high intensity and tough weld structures, kinetic information about the phase transformation is essential. In our research group, in-situ observation systems consisting of undulator beam and imaging plate and two dimensional pixel detector have recently been used. The welding torch is driven by a stepping-motor in the system. These make it possible that phase transformation can be identified in real-time under the condition of directional-oriented solidification . In the present work, a combination of analyzing method: the in-situ observation system by X-ray diffraction technique using intense synchrotron radiation, and morphological observation by high-temperature laser scanning confocal microscopy is suggested to analyze the phase transformation during the welding process. Using the results acquired by these analysis methods, phase evolution of hypereutectoid carbon steel, during fusion welding was analyzed. The primary phase was directly identified as an austenite phase. Precipitation of pearlite phase was observed , during cooling followed by the martensitic transformation.

10.18910/12036

12036

In-situ Observation of Steel Weld Solidification and Phase Evolution using Synchrotron Radiation

大阪大学接合科学研究所

英語

2005-12

Transactions of JWRI

34

2

51

55

https://hdl.handle.net/11094/12036

10.18910/12036

https://doi.org/10.18910/12036