Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °C
We report on studies of the dwell fatigue crack growth (FCG) behavior of commercial pure titanium (CP-Ti) TA2 weld joints at 25 °C and 200 °C. Taking into account the effects of load ratio and dwell temperature, the impact of dwell on FCG behavior and the associated fracture mechanism are clearly de...
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| Format: | Article |
| Language: | English |
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MDPI AG
2023-03-01
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| Series: | Metals |
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| Online Access: | https://www.mdpi.com/2075-4701/13/3/553 |
| _version_ | 1797610118605438976 |
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| author | Le Chang Lei Lu Binbin Zhou Changyu Zhou |
| author_facet | Le Chang Lei Lu Binbin Zhou Changyu Zhou |
| author_sort | Le Chang |
| collection | DOAJ |
| description | We report on studies of the dwell fatigue crack growth (FCG) behavior of commercial pure titanium (CP-Ti) TA2 weld joints at 25 °C and 200 °C. Taking into account the effects of load ratio and dwell temperature, the impact of dwell on FCG behavior and the associated fracture mechanism are clearly demonstrated. Meanwhile, in order to illustrate creep–fatigue interaction, finite element simulations are also performed to analyze the evolution of stress and strain field near the crack tip. The results show that with the increase in dwell temperature, the FCG rate is increased. Furthermore, the effect of dwell on FCG behavior is more pronounced at higher load ratios. Finite element simulation results indicate that dwell induces creep stress relaxation and leads to an increase in the equivalent plastic strain near the crack tip. With the increase of dwell temperature and load ratio, the more pronounced creep deformation may lead to a creep-dominated FCG behavior. As consistent with the above analysis, the examination of the fracture surface reveals that more cavities and secondary cracks may be observed because of the increased creep deformation at the higher dwell temperature and load ratio. |
| first_indexed | 2024-03-11T06:09:58Z |
| format | Article |
| id | doaj.art-2021eec6483e4bff9efd43f2bce8ec74 |
| institution | Directory Open Access Journal |
| issn | 2075-4701 |
| language | English |
| last_indexed | 2024-03-11T06:09:58Z |
| publishDate | 2023-03-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Metals |
| spelling | doaj.art-2021eec6483e4bff9efd43f2bce8ec742023-11-17T12:39:22ZengMDPI AGMetals2075-47012023-03-0113355310.3390/met13030553Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °CLe Chang0Lei Lu1Binbin Zhou2Changyu Zhou3School of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, ChinaSchool of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, ChinaEngineering Technology Training Center, Nanjing Vocational University of Industry Technology, Nanjing 210023, ChinaSchool of Mechanical and Power Engineering, Nanjing Tech University, Nanjing 211816, ChinaWe report on studies of the dwell fatigue crack growth (FCG) behavior of commercial pure titanium (CP-Ti) TA2 weld joints at 25 °C and 200 °C. Taking into account the effects of load ratio and dwell temperature, the impact of dwell on FCG behavior and the associated fracture mechanism are clearly demonstrated. Meanwhile, in order to illustrate creep–fatigue interaction, finite element simulations are also performed to analyze the evolution of stress and strain field near the crack tip. The results show that with the increase in dwell temperature, the FCG rate is increased. Furthermore, the effect of dwell on FCG behavior is more pronounced at higher load ratios. Finite element simulation results indicate that dwell induces creep stress relaxation and leads to an increase in the equivalent plastic strain near the crack tip. With the increase of dwell temperature and load ratio, the more pronounced creep deformation may lead to a creep-dominated FCG behavior. As consistent with the above analysis, the examination of the fracture surface reveals that more cavities and secondary cracks may be observed because of the increased creep deformation at the higher dwell temperature and load ratio.https://www.mdpi.com/2075-4701/13/3/553TA2 welded jointdwellfatigue crack growthcreepfracture surface |
| spellingShingle | Le Chang Lei Lu Binbin Zhou Changyu Zhou Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °C Metals TA2 welded joint dwell fatigue crack growth creep fracture surface |
| title | Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °C |
| title_full | Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °C |
| title_fullStr | Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °C |
| title_full_unstemmed | Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °C |
| title_short | Dwell Fatigue Crack Growth Behavior of CP-Ti TA2 Welded Joint at 25 °C and 200 °C |
| title_sort | dwell fatigue crack growth behavior of cp ti ta2 welded joint at 25 °c and 200 °c |
| topic | TA2 welded joint dwell fatigue crack growth creep fracture surface |
| url | https://www.mdpi.com/2075-4701/13/3/553 |
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