Stress induced martensite at the crack tip in NiTi alloys during fatigue loading
Crack tip stress-induced phase transformation mechanisms in nickel-titanium alloys (NiTi) were analyzed by Digital Image Correlation (DIC), under fatigue loads. In particular, Single Edge Crack (SEC) specimens, obtained from a commercial pseudoelastic NiTi sheet, and an ad-hoc experimental setup wer...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2014-09-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://www.fracturae.com/index.php/fis/article/view/1318 |
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| author | E. Sgambitterra L. Bruno C. Maletta |
| author_facet | E. Sgambitterra L. Bruno C. Maletta |
| author_sort | E. Sgambitterra |
| collection | DOAJ |
| description | Crack tip stress-induced phase transformation mechanisms in nickel-titanium alloys (NiTi) were analyzed by Digital Image Correlation (DIC), under fatigue loads. In particular, Single Edge Crack (SEC) specimens, obtained from a commercial pseudoelastic NiTi sheet, and an ad-hoc experimental setup were used, for direct measurements of the near crack tip displacement field by the DIC technique. Furthermore, a fitting procedure was developed to calculate the mode I Stress Intensity Factor (SIF), starting from the measured displacement field. Finally, cyclic tensile tests were performed at different operating temperature, in the range 298-338 K, and the evolution of the SIF was studied, which revealed a marked temperature dependence. |
| format | Article |
| id | doaj-art-7809fb33062445b88e2564c2586e9dbb |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2014-09-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-7809fb33062445b88e2564c2586e9dbb2025-01-03T00:40:23ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932014-09-01830Stress induced martensite at the crack tip in NiTi alloys during fatigue loadingE. Sgambitterra0L. Bruno1C. Maletta2Dept. of Mechanical, Energy and Management Engineering, University of Calabria, 87036 Rende (CS), Italy.Dept. of Mechanical, Energy and Management Engineering, University of Calabria, 87036 Rende (CS), Italy.Dept. of Mechanical, Energy and Management Engineering, University of Calabria, 87036 Rende (CS), Italy.Crack tip stress-induced phase transformation mechanisms in nickel-titanium alloys (NiTi) were analyzed by Digital Image Correlation (DIC), under fatigue loads. In particular, Single Edge Crack (SEC) specimens, obtained from a commercial pseudoelastic NiTi sheet, and an ad-hoc experimental setup were used, for direct measurements of the near crack tip displacement field by the DIC technique. Furthermore, a fitting procedure was developed to calculate the mode I Stress Intensity Factor (SIF), starting from the measured displacement field. Finally, cyclic tensile tests were performed at different operating temperature, in the range 298-338 K, and the evolution of the SIF was studied, which revealed a marked temperature dependence.https://www.fracturae.com/index.php/fis/article/view/1318Digital Image Correlation |
| spellingShingle | E. Sgambitterra L. Bruno C. Maletta Stress induced martensite at the crack tip in NiTi alloys during fatigue loading Fracture and Structural Integrity Digital Image Correlation |
| title | Stress induced martensite at the crack tip in NiTi alloys during fatigue loading |
| title_full | Stress induced martensite at the crack tip in NiTi alloys during fatigue loading |
| title_fullStr | Stress induced martensite at the crack tip in NiTi alloys during fatigue loading |
| title_full_unstemmed | Stress induced martensite at the crack tip in NiTi alloys during fatigue loading |
| title_short | Stress induced martensite at the crack tip in NiTi alloys during fatigue loading |
| title_sort | stress induced martensite at the crack tip in niti alloys during fatigue loading |
| topic | Digital Image Correlation |
| url | https://www.fracturae.com/index.php/fis/article/view/1318 |
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