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Formation of FeNi with L10-ordered structure using high-pressure torsion |
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| Authors: | Seungwon Lee Kaveh Edalati Hideaki Iwaoka Zenji Horita Takumi Ohtsuki Takuo Ohkochi |
| Affiliation: | 1. WPI, International Institute for Carbon-Neutral Energy Research (WPI-I2CNER), Kyushu University, Fukuoka 819-0395, Japan;2. Faculty of Engineering, Department of Materials Science and Engineering, Kyushu University, Fukuoka 819-0395, Japanlee@zaiko6.zaiko.kyushu-u.ac.jp;4. Faculty of Engineering, Department of Materials Science and Engineering, Kyushu University, Fukuoka 819-0395, Japan;5. Japan Synchrotron Radiation Research Institute (JASRI), Hyogo 679-5198, Japan |
| Abstract: | FeNi with the L10-ordered structure is formed over an astronomical timescale in meteorites. In this study, severe plastic deformation using high-pressure torsion (HPT) is employed for the production of the L10 structure in the laboratory. Its formation is confirmed by X-ray diffraction analysis and transmission electron microscopy. Processing of elemental nanopowders by HPT is an effective method for the formation of the L10 phase, which is enhanced by the addition of Co to FeNi or annealing after HPT. The formation of the phase must be associated with enhanced diffusion through HPT. |
| Keywords: | severe plastic deformation (SPD) ultrafine grains (UFG) phase transformation transmission electron microscopy enhanced diffusion |