Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel
In this work, local properties such as hardness and fatigue crack grow rate in the heat-affected zone of four laser-welded butt joints in thin high-strength low-alloy steel were examined, so as to explain and predict fatigue lives at high stress levels through the fracture mechanics approach. The di...
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| Format: | Article |
| Language: | English |
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MDPI AG
2021-08-01
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| Series: | Applied Sciences |
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| Online Access: | https://www.mdpi.com/2076-3417/11/16/7346 |
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| author | Patricio G. Riofrío Joel de Jesus José A. M. Ferreira Carlos Capela |
| author_facet | Patricio G. Riofrío Joel de Jesus José A. M. Ferreira Carlos Capela |
| author_sort | Patricio G. Riofrío |
| collection | DOAJ |
| description | In this work, local properties such as hardness and fatigue crack grow rate in the heat-affected zone of four laser-welded butt joints in thin high-strength low-alloy steel were examined, so as to explain and predict fatigue lives at high stress levels through the fracture mechanics approach. The different welded series presented a similar fatigue crack growth rate in the heat-affected and fusion zones, but lower than base metal due to the higher hardness of the bainitic–martensitic microstructure verified in the welded series. The results showed that at high stress levels in the as-welded condition, the fatigue initiation stage can be neglected and assume some types of cracks, with an initial crack of 0.07 mm and appropriate fatigue crack growth rates, estimates of fatigue life close to the experimental results were obtained. |
| first_indexed | 2024-03-10T09:02:05Z |
| format | Article |
| id | doaj.art-1ee2048f96024e849c3367fd6430e292 |
| institution | Directory Open Access Journal |
| issn | 2076-3417 |
| language | English |
| last_indexed | 2024-03-10T09:02:05Z |
| publishDate | 2021-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Applied Sciences |
| spelling | doaj.art-1ee2048f96024e849c3367fd6430e2922023-11-22T06:40:14ZengMDPI AGApplied Sciences2076-34172021-08-011116734610.3390/app11167346Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy SteelPatricio G. Riofrío0Joel de Jesus1José A. M. Ferreira2Carlos Capela3Departamento de Ciencias de la Energía y Mecánica, Universidad de las Fuerzas Armadas-ESPE, Av. General Rumiñahui S/N, Sangolqui 171103, EcuadorCentre for Mechanical Engineering, Department of Mechanical Engineering, Materials and Processes (CEMMPRE), University of Coimbra, 3004-516 Coimbra, PortugalCentre for Mechanical Engineering, Department of Mechanical Engineering, Materials and Processes (CEMMPRE), University of Coimbra, 3004-516 Coimbra, PortugalCentre for Mechanical Engineering, Department of Mechanical Engineering, Materials and Processes (CEMMPRE), University of Coimbra, 3004-516 Coimbra, PortugalIn this work, local properties such as hardness and fatigue crack grow rate in the heat-affected zone of four laser-welded butt joints in thin high-strength low-alloy steel were examined, so as to explain and predict fatigue lives at high stress levels through the fracture mechanics approach. The different welded series presented a similar fatigue crack growth rate in the heat-affected and fusion zones, but lower than base metal due to the higher hardness of the bainitic–martensitic microstructure verified in the welded series. The results showed that at high stress levels in the as-welded condition, the fatigue initiation stage can be neglected and assume some types of cracks, with an initial crack of 0.07 mm and appropriate fatigue crack growth rates, estimates of fatigue life close to the experimental results were obtained.https://www.mdpi.com/2076-3417/11/16/7346fatigue crack growthlaser weldinghigh-strength low-alloy steelfatigue life |
| spellingShingle | Patricio G. Riofrío Joel de Jesus José A. M. Ferreira Carlos Capela Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel Applied Sciences fatigue crack growth laser welding high-strength low-alloy steel fatigue life |
| title | Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel |
| title_full | Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel |
| title_fullStr | Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel |
| title_full_unstemmed | Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel |
| title_short | Influence of Local Properties on Fatigue Crack Growth of Laser Butt Welds in Thin Plates of High-Strength Low-Alloy Steel |
| title_sort | influence of local properties on fatigue crack growth of laser butt welds in thin plates of high strength low alloy steel |
| topic | fatigue crack growth laser welding high-strength low-alloy steel fatigue life |
| url | https://www.mdpi.com/2076-3417/11/16/7346 |
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