Effect of Friction Stir Welding on Short-Term Creep Response of Pure Titanium
Friction Stir Welding (FSW) is a recent joining technique that has received considerable attention. FSW causes significant variations in the material microstructure commonly associated with changes in the mechanical properties. The present study deals with the creep response of pure titanium (CP-Ti...
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MDPI AG
2023-09-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/9/1616 |
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| author | Stefano Spigarelli Michael Regev Alberto Santoni Marcello Cabibbo Eleonora Santecchia |
| author_facet | Stefano Spigarelli Michael Regev Alberto Santoni Marcello Cabibbo Eleonora Santecchia |
| author_sort | Stefano Spigarelli |
| collection | DOAJ |
| description | Friction Stir Welding (FSW) is a recent joining technique that has received considerable attention. FSW causes significant variations in the material microstructure commonly associated with changes in the mechanical properties. The present study deals with the creep response of pure titanium (CP-Ti grade 2) after FSW. Dog-bone creep samples, obtained by machining, which show the longitudinal axis of each sample being perpendicular to the welding direction, were tested in constant load machines at 550 and 600 °C. The creep response of the FSW samples was analyzed and compared with that of the unwelded material. The shape of the creep curves was conventional, although the FSW samples went to rupture for strains lower than the base metal. The minimum creep rates for FSW samples were, in general, lower than for the unwelded metal tested in equivalent conditions. In addition, when the applied stress was high, deformation concentrated in the parent metal. The creep strain became more and more homogeneous along the gauge length as testing stress decreased. A constitutive model, recently developed for describing the creep response of the base metal, was then used to rationalize the observed reduction in the minimum strain rate in FSW samples. |
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| format | Article |
| id | doaj.art-a8d4e7be5b324dac9f072ab21bd98c61 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-10T22:28:13Z |
| publishDate | 2023-09-01 |
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| series | Metals |
| spelling | doaj.art-a8d4e7be5b324dac9f072ab21bd98c612023-11-19T11:57:26ZengMDPI AGMetals2075-47012023-09-01139161610.3390/met13091616Effect of Friction Stir Welding on Short-Term Creep Response of Pure TitaniumStefano Spigarelli0Michael Regev1Alberto Santoni2Marcello Cabibbo3Eleonora Santecchia4Dipartimento di Ingegneria Industriale e Scienze Matematiche (DIISM), Università Politecnica Delle Marche, Via Brecce Bianche 12, 60131 Ancona, ItalyMechanical Engineering Department, Braude College, P.O. Box 78, Karmiel 2161002, IsraelDipartimento di Ingegneria Industriale e Scienze Matematiche (DIISM), Università Politecnica Delle Marche, Via Brecce Bianche 12, 60131 Ancona, ItalyDipartimento di Ingegneria Industriale e Scienze Matematiche (DIISM), Università Politecnica Delle Marche, Via Brecce Bianche 12, 60131 Ancona, ItalyDipartimento di Ingegneria Industriale e Scienze Matematiche (DIISM), Università Politecnica Delle Marche, Via Brecce Bianche 12, 60131 Ancona, ItalyFriction Stir Welding (FSW) is a recent joining technique that has received considerable attention. FSW causes significant variations in the material microstructure commonly associated with changes in the mechanical properties. The present study deals with the creep response of pure titanium (CP-Ti grade 2) after FSW. Dog-bone creep samples, obtained by machining, which show the longitudinal axis of each sample being perpendicular to the welding direction, were tested in constant load machines at 550 and 600 °C. The creep response of the FSW samples was analyzed and compared with that of the unwelded material. The shape of the creep curves was conventional, although the FSW samples went to rupture for strains lower than the base metal. The minimum creep rates for FSW samples were, in general, lower than for the unwelded metal tested in equivalent conditions. In addition, when the applied stress was high, deformation concentrated in the parent metal. The creep strain became more and more homogeneous along the gauge length as testing stress decreased. A constitutive model, recently developed for describing the creep response of the base metal, was then used to rationalize the observed reduction in the minimum strain rate in FSW samples.https://www.mdpi.com/2075-4701/13/9/1616creeptitaniumfriction stir weldingconstitutive equations |
| spellingShingle | Stefano Spigarelli Michael Regev Alberto Santoni Marcello Cabibbo Eleonora Santecchia Effect of Friction Stir Welding on Short-Term Creep Response of Pure Titanium Metals creep titanium friction stir welding constitutive equations |
| title | Effect of Friction Stir Welding on Short-Term Creep Response of Pure Titanium |
| title_full | Effect of Friction Stir Welding on Short-Term Creep Response of Pure Titanium |
| title_fullStr | Effect of Friction Stir Welding on Short-Term Creep Response of Pure Titanium |
| title_full_unstemmed | Effect of Friction Stir Welding on Short-Term Creep Response of Pure Titanium |
| title_short | Effect of Friction Stir Welding on Short-Term Creep Response of Pure Titanium |
| title_sort | effect of friction stir welding on short term creep response of pure titanium |
| topic | creep titanium friction stir welding constitutive equations |
| url | https://www.mdpi.com/2075-4701/13/9/1616 |
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