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 w...
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Gruppo Italiano Frattura
2014-10-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_22.pdf |
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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-23a3ba38b9fd49d8a9b4d9dcef941b16 |
| institution | Kabale University |
| issn | 1971-8993 1971-8993 |
| language | English |
| publishDate | 2014-10-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-23a3ba38b9fd49d8a9b4d9dcef941b162025-01-02T20:54:15ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89931971-89932014-10-0183016717310.3221/IGF-ESIS.30.22 Stress induced martensite at the crack tip in NiTi alloys during fatigue loadingE. Sgambitterra 0L. Bruno 1C. Maletta 2University of Calabria University of Calabria University of Calabria 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.http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_22.pdfShape Memory alloysFractureDigital Image CorrelationStress Intensity Factor |
| spellingShingle | E. Sgambitterra L. Bruno C. Maletta Stress induced martensite at the crack tip in NiTi alloys during fatigue loading Fracture and Structural Integrity Shape Memory alloys Fracture Digital Image Correlation Stress Intensity Factor |
| 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 | Shape Memory alloys Fracture Digital Image Correlation Stress Intensity Factor |
| url | http://www.gruppofrattura.it/pdf/rivista/numero30/numero_30_art_22.pdf |
| work_keys_str_mv | AT esgambitterra stressinducedmartensiteatthecracktipinnitialloysduringfatigueloading AT lbruno stressinducedmartensiteatthecracktipinnitialloysduringfatigueloading AT cmaletta stressinducedmartensiteatthecracktipinnitialloysduringfatigueloading |