Journal article
Unusual behavior of long-range order parameter in Fe3Al superstructure under severe plastic deformation in Bridgman anvils
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JOURNAL OF ALLOYS AND COMPOUNDS
Publication Details
Author list: Glezer AM, Timshin IA, Shchetinin IV, Gorshenkov MV, Sundeev RV, Ezhova AG
Publisher: Elsevier
Place: LAUSANNE
Publication year: 2018
Volume number: 744
Start page: 791
End page: 796
Number of pages: 6
ISSN: 0925-8388
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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 D0(3) 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. (C) 2018 Elsevier B.V. All rights reserved.

Keywords
High pressure torsion, Phase transformation

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Last updated on 2018-14-09 at 00:01