Weld structure of low-carbon structural steel formed by ultrasonic-assisted laser welding
| Autor: | A.V. Kolubaev, A.V. Vorontsov, E.A. Kolubaev, Olga V. Sizova, A.N. Ivanov, S.V. Fortuna |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
business.industry technology industry and agriculture Metals and Alloys Laser beam welding 020101 civil engineering 02 engineering and technology Building and Construction Structural engineering Welding respiratory system Laser 0201 civil engineering law.invention 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials law Ferrite (iron) Ultrasonic assisted Ultrasonic sensor Irradiation Composite material business Civil and Structural Engineering |
| Zdroj: | Journal of Constructional Steel Research. 172:106190 |
| ISSN: | 0143-974X |
| DOI: | 10.1016/j.jcsr.2020.106190 |
| Popis: | The present study is aimed to examine the structure of a welded joint of low-carbon structural steel A 516–55 formed by melting under laser irradiation and by subsequent melt solidification. The main disadvantage of the weld structure in this steel is the formation of plate- and needle-like Widmanstatten ferrite in the conditions of ultra-fast heating and cooling which adversely affects the strength properties of the welded joints. It is shown that the application of ultrasonic vibrations during welding changes the melt solidification conditions and positively affects the dispersion of dendrites and growing Widmanstatten ferrite crystals. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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