In situ characterization of the functional degradation of a [001] orientated Fe–Mn–Al–Ni single crystal under compression using acoustic emission measurements

doi:10.1016/j.actamat.2021.117333

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In situ characterization of the functional degradation of a [001] orientated Fe–Mn–Al–Ni single crystal under compression using acoustic emission measurements	7 MB	Adobe Acrobat PDF	Read	Download
DOI Доступ к ресурсу на сайте издателя			10.1016/j.actamat.2021.117333

#сплавы с памятью формы на основе железа

#мартенситное превращение

#фазовые превращения

#сверхупругость

#акустическая эмиссия

Title: In situ characterization of the functional degradation of a [001] orientated Fe–Mn–Al–Ni single crystal under compression using acoustic emission measurements
Creator: Weidner, Anja
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Vinogradov, Alexei
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Vollmer, Malte
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Krooß, Philipp
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Kriegel, Mario J.
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Klemm, Volker
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Chumlyakov, Yuri I.
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Niendorf, Thomas
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Biermann, Horst
Date: 2021
DOI: 10.1016/j.actamat.2021.117333
Description: Acoustic emission (AE) measurements were conducted in situ during cyclic compressive loading on an [ 00 1 over line ] orientated single crystal of Fe-Mn-Al-Ni shape memory alloy to study functional degradation of its superelastic response. The acoustic investigations were corroborated by optical microscopy, employing video imaging, and transmission electron microscopy. The analysis of acoustic emissions recorded during repeated loading and unloading sessions revealed two categories of AE signals that are differed by their characteristics in time and frequency domains. These two distinct types of AE signals were related to two underlying mechanisms: (i) the nucleation and reverse transformation of stress-induced (twinned) martensite, and (ii) the lateral growth and shrinkage of one dominant martensite variant and related dislocation activities, respectively. In addition, an asymmetry in the AE activity during forward and reverse transformation during mechanical loading and unloading was detected. In particular, an unexpected high AE activity was observed during the superelastic unloading of martensitic microstructure from the point of maximum load/strain. This effect was attributed to the reverse transformation of small, tiny areas of martensite as well as to unpinning and annihilation effects related to dislocations. (c) 2021 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.

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collection(s): Сибирский физико-технический институт
Identifier: смотреть в электронном каталоге НБ ТГУ
Type: статьи в журналах
Source: Acta materialia. 2021. Vol. 220. P. 17333 (1-19)
Language: eng

Created: 18-04-2022

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Сибирский физико-технический институт In situ characterization of the functional degradation of a [001] orientated Fe–Mn–Al–Ni single crystal under compression using acoustic emission measurements