Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening
The work is devoted to experimental investigation of the laser shock peening (LSP) effect on fatigue crack propagation rate and heat dissipation at the crack tip in specimens made of titanium alloy Grade 2 with a stress concentrator. It is shown that the LSP can leads both to positive and negative...
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| Format: | Article |
| Language: | English |
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Gruppo Italiano Frattura
2022-09-01
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| Series: | Fracture and Structural Integrity |
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| Online Access: | https://3.64.71.86/index.php/fis/article/view/3742 |
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| author | Anastasia Iziumova Aleksei Vshivkov Aleksandr Prokhorov Elena Gachegova Denis Davydov |
| author_facet | Anastasia Iziumova Aleksei Vshivkov Aleksandr Prokhorov Elena Gachegova Denis Davydov |
| author_sort | Anastasia Iziumova |
| collection | DOAJ |
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The work is devoted to experimental investigation of the laser shock peening (LSP) effect on fatigue crack propagation rate and heat dissipation at the crack tip in specimens made of titanium alloy Grade 2 with a stress concentrator. It is shown that the LSP can leads both to positive and negative effect on fatigue lifetime. The effective processing scheme, which includes stress concentrator zone, was proposed. This type of treatment forms an optimal residual stress field, which slows down the crack initiation and propagation processes. The effective LSP processing scheme reduces the value of the stress intensity factor and, as a consequence, effects on an intensity of plastic deformation at the crack tip. This effect can be visualised by measurement of heat flux from the crack tip area. Both heat flux from the crack tip and crack rate are less in the LSP processed specimens. Structural investigations of LSP treated material near fatigue crack path have shown that structural defects (twins) that appear on the surface of the material as a result of LSP do not have a significant effect on the fatigue crack propagation, and the configuration of the residual stresses field created by LSP plays a decisive role.
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| format | Article |
| id | doaj-art-f7b6ab0aeb2441d2ab50c75142656c83 |
| institution | Kabale University |
| issn | 1971-8993 |
| language | English |
| publishDate | 2022-09-01 |
| publisher | Gruppo Italiano Frattura |
| record_format | Article |
| series | Fracture and Structural Integrity |
| spelling | doaj-art-f7b6ab0aeb2441d2ab50c75142656c832025-01-02T22:45:01ZengGruppo Italiano FratturaFracture and Structural Integrity1971-89932022-09-011662Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peeningAnastasia Iziumova0Aleksei Vshivkov1Aleksandr Prokhorov2Elena Gachegova3Denis Davydov4Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), RussiaInstitute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), RussiaInstitute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), RussiaInstitute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), RussiaInstitute of Metal Physics of the Ural Branch of Russian Academy of Sciences (IMP UB RAS), Russia - Ural Federal University (UrFU), Russia The work is devoted to experimental investigation of the laser shock peening (LSP) effect on fatigue crack propagation rate and heat dissipation at the crack tip in specimens made of titanium alloy Grade 2 with a stress concentrator. It is shown that the LSP can leads both to positive and negative effect on fatigue lifetime. The effective processing scheme, which includes stress concentrator zone, was proposed. This type of treatment forms an optimal residual stress field, which slows down the crack initiation and propagation processes. The effective LSP processing scheme reduces the value of the stress intensity factor and, as a consequence, effects on an intensity of plastic deformation at the crack tip. This effect can be visualised by measurement of heat flux from the crack tip area. Both heat flux from the crack tip and crack rate are less in the LSP processed specimens. Structural investigations of LSP treated material near fatigue crack path have shown that structural defects (twins) that appear on the surface of the material as a result of LSP do not have a significant effect on the fatigue crack propagation, and the configuration of the residual stresses field created by LSP plays a decisive role. https://3.64.71.86/index.php/fis/article/view/3742FatigueLaser shock peeningHeat dissipationCrack propagation rateTwinsResidual stress |
| spellingShingle | Anastasia Iziumova Aleksei Vshivkov Aleksandr Prokhorov Elena Gachegova Denis Davydov Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening Fracture and Structural Integrity Fatigue Laser shock peening Heat dissipation Crack propagation rate Twins Residual stress |
| title | Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening |
| title_full | Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening |
| title_fullStr | Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening |
| title_full_unstemmed | Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening |
| title_short | Heat dissipation and fatigue crack kinetic features of titanium alloy Grade 2 after laser shock peening |
| title_sort | heat dissipation and fatigue crack kinetic features of titanium alloy grade 2 after laser shock peening |
| topic | Fatigue Laser shock peening Heat dissipation Crack propagation rate Twins Residual stress |
| url | https://3.64.71.86/index.php/fis/article/view/3742 |
| work_keys_str_mv | AT anastasiaiziumova heatdissipationandfatiguecrackkineticfeaturesoftitaniumalloygrade2afterlasershockpeening AT alekseivshivkov heatdissipationandfatiguecrackkineticfeaturesoftitaniumalloygrade2afterlasershockpeening AT aleksandrprokhorov heatdissipationandfatiguecrackkineticfeaturesoftitaniumalloygrade2afterlasershockpeening AT elenagachegova heatdissipationandfatiguecrackkineticfeaturesoftitaniumalloygrade2afterlasershockpeening AT denisdavydov heatdissipationandfatiguecrackkineticfeaturesoftitaniumalloygrade2afterlasershockpeening |