Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffraction
Iron-based shape memory alloys (Fe-SMAs) are e-merging materials with extensive application in civil structures owing to their unique properties, including the shape memory effect. However, it is crucial to understand the time dependent behavior of Fe-SMAs for their effective application as pre-stre...
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Elsevier
2024-11-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127524007536 |
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| author | Meet Jaydeepkumar Oza Andreas Stark Efthymios Polatidis Pere Barriobero Vila Moslem Shahverdi Christian Leinenbach |
| author_facet | Meet Jaydeepkumar Oza Andreas Stark Efthymios Polatidis Pere Barriobero Vila Moslem Shahverdi Christian Leinenbach |
| author_sort | Meet Jaydeepkumar Oza |
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| description | Iron-based shape memory alloys (Fe-SMAs) are e-merging materials with extensive application in civil structures owing to their unique properties, including the shape memory effect. However, it is crucial to understand the time dependent behavior of Fe-SMAs for their effective application as pre-stressing element. In particular, behavior at individual stress, the underlying mechanism, and the transformation kinetics have not been investigated yet. To address these important fundamental research gaps, in-situ compression creep and stress relaxation experiments with high-energy X-ray diffraction (HEXRD) of a Fe-17Mn-5Si-10Cr-4Ni-1(V,C) Fe-SMAs were conducted. The time-dependent behavior of the Fe-SMA was investigated at different stress levels with respect to the yield strength (YS) at room temperature. The experimental result showed that the material exhibits a creep strain of up to 1.84 % and 56 MPa relaxed stress at test stress of 769 MPa (1.6 σYS) within one hour of holding. Stacking fault probability and phase volume fraction quantification provide an understanding of the mechanisms based on different stress levels. The transformation kinetics traced from the characteristics of HEXRD peaks offer further insights on creep depending on the contribution of {hkl} families. The paper concludes with an evaluation of the existing models for predicting creep and stress relaxation of Fe-SMA. |
| format | Article |
| id | doaj-art-3025b25fd79a4017bec899c4c63c2b1a |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2024-11-01 |
| publisher | Elsevier |
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| spelling | doaj-art-3025b25fd79a4017bec899c4c63c2b1a2024-12-05T05:19:04ZengElsevierMaterials & Design0264-12752024-11-01247113378Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffractionMeet Jaydeepkumar Oza0Andreas Stark1Efthymios Polatidis2Pere Barriobero Vila3Moslem Shahverdi4Christian Leinenbach5Empa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland; Laboratory for Photonic Materials and Characterization, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, SwitzerlandInstitute of Materials Physics, Helmholtz – Zentrum Hereon, Geesthacht, GermanyLaboratory of Technology and Strength of Materials, Department of Mechanical Engineering and Aeronautics, University of Patras, Patra 26504, GreeceDepartment of Material Science and Engineering, Technical University of Catalonia-BarcelonaTech (UPC), Barcelona 08019, Spain; CIM UPC, Carrer de Llorens i Artigas 12, 08028 Barcelona, SpainEmpa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland; School of Civil Engineering, University of Tehran, 16th Azar Street, Tehran, IranEmpa, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, 8600 Dübendorf, Switzerland; Laboratory for Photonic Materials and Characterization, École Polytechnique Fédérale de Lausanne (EPFL), 1015 Lausanne, Switzerland; Corresponding author.Iron-based shape memory alloys (Fe-SMAs) are e-merging materials with extensive application in civil structures owing to their unique properties, including the shape memory effect. However, it is crucial to understand the time dependent behavior of Fe-SMAs for their effective application as pre-stressing element. In particular, behavior at individual stress, the underlying mechanism, and the transformation kinetics have not been investigated yet. To address these important fundamental research gaps, in-situ compression creep and stress relaxation experiments with high-energy X-ray diffraction (HEXRD) of a Fe-17Mn-5Si-10Cr-4Ni-1(V,C) Fe-SMAs were conducted. The time-dependent behavior of the Fe-SMA was investigated at different stress levels with respect to the yield strength (YS) at room temperature. The experimental result showed that the material exhibits a creep strain of up to 1.84 % and 56 MPa relaxed stress at test stress of 769 MPa (1.6 σYS) within one hour of holding. Stacking fault probability and phase volume fraction quantification provide an understanding of the mechanisms based on different stress levels. The transformation kinetics traced from the characteristics of HEXRD peaks offer further insights on creep depending on the contribution of {hkl} families. The paper concludes with an evaluation of the existing models for predicting creep and stress relaxation of Fe-SMA.http://www.sciencedirect.com/science/article/pii/S0264127524007536Fe-based shape memory alloy (Fe-SMA)high-energy X-ray diffraction (HEXRD)CreepStress relaxationPhase transformationTransformation kinetics |
| spellingShingle | Meet Jaydeepkumar Oza Andreas Stark Efthymios Polatidis Pere Barriobero Vila Moslem Shahverdi Christian Leinenbach Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffraction Materials & Design Fe-based shape memory alloy (Fe-SMA) high-energy X-ray diffraction (HEXRD) Creep Stress relaxation Phase transformation Transformation kinetics |
| title | Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffraction |
| title_full | Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffraction |
| title_fullStr | Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffraction |
| title_full_unstemmed | Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffraction |
| title_short | Characterization of low-temperature creep and stress relaxation of an iron-based shape memory alloy (Fe-SMA) using in-situ synchrotron diffraction |
| title_sort | characterization of low temperature creep and stress relaxation of an iron based shape memory alloy fe sma using in situ synchrotron diffraction |
| topic | Fe-based shape memory alloy (Fe-SMA) high-energy X-ray diffraction (HEXRD) Creep Stress relaxation Phase transformation Transformation kinetics |
| url | http://www.sciencedirect.com/science/article/pii/S0264127524007536 |
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