The dislocation properties of intermetallic compound (IMC) B2-AlPr in {110} plane is studied in detail based on the truncated approximation method in this paper. The results suggest that the core width of screw dislocation and edge dislocation of Burgers vector < 100 > is wider than that of < 110 >. Meanwhile, their unstable-stacking-fault energy (γus\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \gamma_{\text{us}} $$\end{document}) of γus⟨110⟩>γus⟨001⟩\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \gamma_{\text{us}} \langle 110\rangle > \gamma_{\text{us}} \langle 001\rangle $$\end{document} indicates that the unstable-stacking-fault energy performs very important function on the core width of screw dislocation. The easiest slip system of B2-AlPr is < 111 > {110}. The lattice misfit energy is always less than elastic strain energy except the dislocation angle with 54.7°. The phase position of misfit energy and elastic strain energy is always showing opposite phases. However, the misfit energy is greater than elastic strain energy for 54.7° dislocation, and shows the same phase. The misfit energy, elastic strain energy, total energy and the corresponding stress decrease with the increasing of dislocation angle.

中文翻译：

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B2-AlPr在{110}面的位错特性

本文基于截断近似法详细研究了金属间化合物(IMC)B2-AlPr在{110}面的位错特性。结果表明，Burgers vector<100>的螺位错和刃位错的核心宽度比<110>的要宽。同时，它们的不稳定堆叠故障能量 (γus\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \ usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$ \gamma_{\text{us}} $$\end{document}) of γus⟨110⟩> γus⟨001⟩\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{ \oddsidemargin}{-69pt} \begin{document}$$ \gamma_{\text{us}} \langle 110\rangle > \gamma_{\text{us}} \langle 001\rangle $$\end{document}表明不稳定堆垛层错能对螺位错的核心宽度起着非常重要的作用。B2-AlPr 最简单的滑移系统是 < 111 > {110}。除了位错角为 54.7° 外，晶格失配能总是小于弹性应变能。失配能和弹性应变能的相位总是呈现相反的相位。然而，错配能大于 54.7°位错的弹性应变能，并显示出相同的相位。不合时宜的能量，