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The preferential orientation and lattice misfit of the directionally solidified Fe-Al-Ta eutectic composite

机译:定向凝固Fe-Al-Ta共晶复合材料的优先取向和晶格失配

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摘要

Fe-Al intermetallic compound has been paid more attentions recently in many fields such as aeronautic, aerospace, automobile, energy and chemical engineering, and so on. In this paper Fe-Al-Ta eutectic was prepared by a modified Bridgman directional solidification technique, and it is found that microstructure of the Fe-Al-Ta eutectic alloy transforms from the broken-lamellar eutectic to cellular eutectic with the increase of the solidification rate. In the cellular eutectic structure, the fibers are parallel to each other within the same grain, but some fibers are deviated from the original orientation at the grain boundaries. To study the crystallographic orientation relationship (OR) between the two phases, the preferential orientation of the Fe-Al-Ta eutectic alloy at the different solidification rates was studied by Selected Area Electron Diffraction (SAED). Moreover, the lattice misfit between Fe_2Ta(Al) Laves phase and Fe(Al,Ta) matrix phase was calculated.
机译:Fe-Al金属间化合物最近在航空,航天,汽车,能源和化学工程等许多领域得到了越来越多的关注。本文采用改进的Bridgman定向凝固技术制备了Fe-Al-Ta共晶,发现随着凝固量的增加,Fe-Al-Ta共晶合金的显微组织从破碎的层状共晶转变为胞状共晶。率。在蜂窝共晶结构中,纤维在同一晶粒内彼此平行,但有些纤维在晶粒边界偏离了原始方向。为了研究两相之间的晶体取向关系(OR),通过选择面积电子衍射(SAED)研究了不同凝固速率下Fe-Al-Ta共晶合金的优先取向。此外,计算了Fe_2Ta(Al)Laves相与Fe(Al,Ta)基体相之间的晶格失配。

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  • 来源
    《Applied Physics》 |2018年第1期|124:12.1-124:12.8|共8页
  • 作者单位

    School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China,Shaanxi Engineering Technology Research Center for Wear-resisting Materials, Xi'an 710055, China;

    School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;

    School of Metallurgical Engineering, Xi'an University of Architecture and Technology, Xi'an 710055, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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  • 正文语种 eng
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