Two-Dimensional Time-Resolved X-ray Diffraction Study of Directional Solidification in Steels
Mitsuharu Yonemura,Takahiro Osuki,Hidenori Terasaki,Yu-ichi Komizo,Masugu Sato,Hidenori Toyokawa +5 more
TLDR
In this article, in situ characterization of directional solidification process during welding was carried out using the time resolved X-ray diffraction technique utilizing intense synchrotron radiation, and the behavior 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.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.read more
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Revisiting the Structure of Martensite in Iron-Carbon Steels
TL;DR: In this paper, the formation and crystal structure of martensite in quenched Fe-C steels based on the extensive published literature on the subject is described. But the authors focus on the H-point, which is defined as the point at which martensites will form at the highest C contents.
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A new nanoscale metastable iron phase in carbon steels
Tianwei Liu,Danxia Zhang,Qing Liu,Yanjun Zheng,Yanjing Su,Xinqing Zhao,Jiang Yin,Minghui Song,Dehai Ping +8 more
TL;DR: An intensive TEM investigation revealed that extra diffraction spots observed by transmission electron microscopy are in fact attributed to the metastable ω phase in particle-like morphology with an overall size of several or dozens of nanometres.
Journal ArticleDOI
Real time observation of martensite transformation for a 0.4C low alloyed steel by neutron diffraction
Yanxu Wang,Yo Tomota,Yo Tomota,Takahito Ohmura,Satoshi Morooka,Wu Gong,Stefanus Harjo,Stefanus Harjo +7 more
TL;DR: In this article, a high-intensity and high-resolution neutron diffractometer with a thermomechanically controlled processing simulator was employed in-situ to investigate martensite transformation behavior with and without ausforming for a medium-carbon low-alloy steel.
Journal ArticleDOI
In situ observation of phase transformation in Fe–0.15C binary alloy
TL;DR: In this paper, high temperature laser scanning confocal microscopy with an infrared imaging furnace has been used to directly observe the morphological development of γ-→-α transformations, which makes possible that phase transformation can be identified in real time during heating and continuously cooling process.
Journal ArticleDOI
Single photon counting pixel detectors for synchrotron radiation experiments
Hidenori Toyokawa,Ch. Broennimann,E. F. Eikenberry,B. Henrich,M. Kawase,M. Kobas,P. Kraft,M. Sato,Bernd Schmitt,Motohiro Suzuki,H. Tanida,Tomoya Uruga +11 more
TL;DR: PILATUS as mentioned in this paper is an X-ray single photon counting pixel detector based on the hybrid-pixel detector technology, which was developed in collaboration with SPring-8.
References
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