Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress Conditions
Active materials have gained increasing momentum during the last decades due to their ability to act as sensors and actuators without the need for an external controlling system or an electronic signal. Shape memory alloys (SMAs), which are a subcategory of active materials, are slowly being introdu...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-12-01
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| Series: | Materials |
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| Online Access: | https://www.mdpi.com/1996-1944/16/1/237 |
| _version_ | 1797625411528556544 |
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| author | Eva Marinopoulou Konstantinos Katakalos |
| author_facet | Eva Marinopoulou Konstantinos Katakalos |
| author_sort | Eva Marinopoulou |
| collection | DOAJ |
| description | Active materials have gained increasing momentum during the last decades due to their ability to act as sensors and actuators without the need for an external controlling system or an electronic signal. Shape memory alloys (SMAs), which are a subcategory of active materials, are slowly being introduced in the civil engineering sector in applications that refer to prestressing and strengthening of various structural elements. Low-cost iron-based SMAs are a good alternative to the Ni-Ti SMAs for such uses since the cost of large-scale civil engineering applications would otherwise be prohibitive. The scope of this study is the investigation of the thermomechanical response of the Fe-17Mn-5Si-10Cr-4Ni-1(V,C) ferrous SMA. In particular, this study focuses on the application of prestress, and on the alloy’s behavior under fatigue loadings. In addition, the effect of loading frequency on the recovery stress of the material is thoroughly investigated. Four dog-bone specimens were prepared and tested in low-cycle fatigue. All the experiments aimed at the simulation of prestress. The recovery stress was monitored after pre-straining and heating applied under strain–control conditions. The experimental results are promising in terms of the is situ prestress feasibility since the measured recovery stress values are satisfactory high. |
| first_indexed | 2024-03-11T09:56:11Z |
| format | Article |
| id | doaj.art-a31f8f1872cf4ba8b9aee989b41041a8 |
| institution | Directory Open Access Journal |
| issn | 1996-1944 |
| language | English |
| last_indexed | 2024-03-11T09:56:11Z |
| publishDate | 2022-12-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Materials |
| spelling | doaj.art-a31f8f1872cf4ba8b9aee989b41041a82023-11-16T15:48:54ZengMDPI AGMaterials1996-19442022-12-0116123710.3390/ma16010237Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress ConditionsEva Marinopoulou0Konstantinos Katakalos1Laboratory of Strength of Materials and Structures, Department of Civil Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, GreeceLaboratory of Strength of Materials and Structures, Department of Civil Engineering, Faculty of Engineering, Aristotle University of Thessaloniki, 541 24 Thessaloniki, GreeceActive materials have gained increasing momentum during the last decades due to their ability to act as sensors and actuators without the need for an external controlling system or an electronic signal. Shape memory alloys (SMAs), which are a subcategory of active materials, are slowly being introduced in the civil engineering sector in applications that refer to prestressing and strengthening of various structural elements. Low-cost iron-based SMAs are a good alternative to the Ni-Ti SMAs for such uses since the cost of large-scale civil engineering applications would otherwise be prohibitive. The scope of this study is the investigation of the thermomechanical response of the Fe-17Mn-5Si-10Cr-4Ni-1(V,C) ferrous SMA. In particular, this study focuses on the application of prestress, and on the alloy’s behavior under fatigue loadings. In addition, the effect of loading frequency on the recovery stress of the material is thoroughly investigated. Four dog-bone specimens were prepared and tested in low-cycle fatigue. All the experiments aimed at the simulation of prestress. The recovery stress was monitored after pre-straining and heating applied under strain–control conditions. The experimental results are promising in terms of the is situ prestress feasibility since the measured recovery stress values are satisfactory high.https://www.mdpi.com/1996-1944/16/1/237ferrous shape memory alloysprestressrecovery stressrelaxationthermomechanical behaviorfatigue |
| spellingShingle | Eva Marinopoulou Konstantinos Katakalos Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress Conditions Materials ferrous shape memory alloys prestress recovery stress relaxation thermomechanical behavior fatigue |
| title | Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress Conditions |
| title_full | Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress Conditions |
| title_fullStr | Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress Conditions |
| title_full_unstemmed | Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress Conditions |
| title_short | Thermomechanical Fatigue Testing on Fe-Mn-Si Shape Memory Alloys in Prestress Conditions |
| title_sort | thermomechanical fatigue testing on fe mn si shape memory alloys in prestress conditions |
| topic | ferrous shape memory alloys prestress recovery stress relaxation thermomechanical behavior fatigue |
| url | https://www.mdpi.com/1996-1944/16/1/237 |
| work_keys_str_mv | AT evamarinopoulou thermomechanicalfatiguetestingonfemnsishapememoryalloysinprestressconditions AT konstantinoskatakalos thermomechanicalfatiguetestingonfemnsishapememoryalloysinprestressconditions |