A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Weld structure of low-carbon structural steel formed by ultrasonic-assisted laser welding
Abstract 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 Widmanstätten 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 Widmanstätten ferrite crystals.
Highlights Fragmentation of weld dendritic structure of steel by ultrasonic treatment. Ultrasound at laser welding of low-alloy steel inhibits growth Widmanstätten ferrite crystals. The weld metal of low-alloy steel is hardened by ultrasonic treatment.
Weld structure of low-carbon structural steel formed by ultrasonic-assisted laser welding
Abstract 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 Widmanstätten 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 Widmanstätten ferrite crystals.
Highlights Fragmentation of weld dendritic structure of steel by ultrasonic treatment. Ultrasound at laser welding of low-alloy steel inhibits growth Widmanstätten ferrite crystals. The weld metal of low-alloy steel is hardened by ultrasonic treatment.
Weld structure of low-carbon structural steel formed by ultrasonic-assisted laser welding
Kolubaev, A.V. (author) / Sizova, O.V. (author) / Fortuna, S.V. (author) / Vorontsov, A.V. (author) / Ivanov, A.N. (author) / Kolubaev, E.A. (author)
2020-06-01
Article (Journal)
Electronic Resource
English
Laser welding and weld hardness analysis of thick section S355 structural steel
| British Library Online Contents | 2011
Defect Detection in Thick Weld Structure Using Welding In-Process Laser Ultrasonic Testing System
| British Library Online Contents | 2014