Abstract By X-Ray diffraction and transmission electron microscopy methods the evolution of long-range order parameters and morphology of antiphase boundaries in Fe3Al superstructure (DO3 type) under high pressure torsion (HPT) in Bridgman anvils at room temperature have been investigated. It was detected a new phenomenon: the partial restoration at the N ≥ 1 of completely destroyed D03 long-range order under the HPT deformation (N - the number of complete revolutions of the movable anvil). It was shown that the discovered effect is due to the activation of low-temperature dynamic recrystallization under the SPD and, as a result, to occurrence of the mixture of deformation fragments and recrystallized grains. The averaged long-range order parameter for the first coordination sphere is equal to 0.24–0.26 at N ≥ 2. It was estimated that the value of restored parameter of ordering inside the recrystallized grains is approaching the initial one at the N = 2 and corresponds to the partial restoring at the N > 2.

中文翻译：

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Bridgman 铁砧严重塑性变形下 Fe 3 Al 上层结构长程有序参数的异常行为

摘要 通过X射线衍射和透射电子显微镜方法，研究了室温下Bridgman砧在高压扭转（HPT）下Fe3Al超结构（DO3型）的长程有序参数和反相边界形态的演变。检测到一个新现象：在HPT变形（N-动砧完整转数）下，完全破坏的D03长程有序在N≥1处部分恢复。结果表明，发现的效应是由于 SPD 下低温动态再结晶的激活，从而导致变形碎片和再结晶晶粒的混合。在 N ≥ 2 时，第一协调球的平均长程有序参数等于 0.24–0.26。