Two-Dimensional Time-Resolved X-ray Diffraction Study of Directional Solidification in Steels

Mitsuharu Yonemura; Takahiro Osuki; Hidenori Terasaki; Yuichi Komizo; Masugu Sato; Hidenori Toyokawa

doi:10.2320/matertrans.47.2292

Mitsuharu Yonemura, Takahiro Osuki, Hidenori Terasaki, Yuichi Komizo, Masugu Sato, Hidenori Toyokawa

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Keywords: welding, steels, phase transformation, rapid solidification, in situ time-resolved X-ray diffraction

JOURNAL FREE ACCESS

2006 Volume 47 Issue 9 Pages 2292-2298

DOI https://doi.org/10.2320/matertrans.47.2292

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Abstract

In situ characterization of directional solidification process during welding was carried out using the time resolved X-ray diffraction technique utilizing intense synchrotron radiation. Then, behaviour of dendrites in steels under welding conditions of a practical manufacturing process were investigated using the TRXRD method for in-situ weld observation with the uniquely-sensitive two-dimensional pixel detector. Consequently, the crystal growth during the rapid cooling was caught in detail and employed a systematic peak profile analysis in order to acquire the essential information for controlling the weld microstructure. Our results would suggest the microstructure formation process of low alloy in directional solidification during rapid cooling. Simultaneously, we discuss the possibility of detecting the nucleation.

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