Laser-Arc hybrid welding perspective ultra-high strength steels: influence of the chemical composition of weld metal on microstructure and mechanical properties

Turichin, Gleb; Кузнецов, М. В.; Klimova-Korsmik, Olga; Sklyar, M. O.; Zhitenev, Andrey; Kurakin, A.; Pozdnyakov, A. A.

doi:10.1016/j.procir.2018.08.017

Cited by 14 publications

(3 citation statements)

References 10 publications

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“…LAHW presented a greater development in the nineties due to the availability of CO2 lasers that could concentrate densities of higher powers, up to 10 6 W/cm 2 . Since then, several studies have been focused on materials approach applied on steel [10,13], titanium [14,15], aluminium alloys [16,17] or dissimilar joints [18,19]. Diverse investigations have been carried out to face different aspect of the process, as the economic viability of the laser-arc hybrid welding process, the influence of the relative position of the laser beam and the torch of the electric arc, edge preparation, minimization of metallurgical defects, optimization of process parameters, etc [20][21][22][23].…”

Section: Gmaw (Gas Metalmentioning

confidence: 99%

Laser Hybrid Butt Welding of Large Thickness Naval Steel

Churiaque

Chludzinski

Porrúa-Lara³

et al. 2019

Metals

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Plates joining is one of the first stage at large vessels manufacturing line, process conditioning the whole shipbuilding production. Laser Arc Hybrid Welding (LAHW) process is nowadays providing promising results for large thickness naval steel, being primarily used for welding plates with thicknesses between 6 to 15 mm, reaching up to 51 mm. In addition to this high penetration ability, LAHW allows increasing the production rates. Therefore, this technology is proposed as an alternative to conventional welding processes in shipbuilding, as it integrates the advantages of laser and arc welding, providing high process stability, high welding speed and penetration, narrow weld beads with a low heat input and good metallurgical properties. The present review reports the most representative investigation regarding the use of this technology to join large thickness flat panels of naval steel. It includes a summary of the most influential process variables, equipment characteristics, material properties, naval regulations, as well as microstructural characterisation and mechanical properties of joints. This review is thought to help readers from different backgrounds, covering from non-expert on welding or on naval sector, to industrial LAHW applicators and researchers. The industrial need of performing one single pass procedure to assure high quality welds of high thickness is suggested as one of the key aspects for future investigations.

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Section: Gmaw (Gas Metalmentioning

confidence: 99%

Laser Hybrid Butt Welding of Large Thickness Naval Steel

Churiaque

Chludzinski

Porrúa-Lara³

et al. 2019

Metals

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“…Es muy amplia la utilización del acero en la construcción de equipos en la industria energética [1], esto se debe a la beneficiosa combinación de propiedades que ostenta, dígase alta resistencia mecánica, dureza y plasticidad [1]. Se definen como propiedades termofísicas aquellas que implican la respuesta de un material a un determinado suministro de calor [2], en este grupo de propiedades la conductividad térmica es de necesario dominio en la ingeniería para realizar un diseño efectivo de sistemas térmicos y sus componentes sometidos a cambios de temperaturas [3].…”

Section: Introductionunclassified

Modelación empírica de la conductividad térmica para un grupo de aceros

Roque-Villalonga

Camaraza-Medina

2022

DYNA

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La relación entre la composición química y la temperatura de trabajo del acero no son lineales con la conductividad térmica por lo que se proponen modelos empíricos para la predicción de esta. Se realizaron mediciones a32 marcaciones de acero AISI laminados y recocidos. Se utilizó el algoritmo de machine learning K- Nearest Neighbor, además se entrenó una red neuronal empleando el software RStudio, específicamente la librería caret, para obtener un modelo empírico que permitió predecir con un adecuado nivel de incertidumbre la conductividad térmica en el rango de temperaturas de 0−800℃. El modelo se probó con un grupo de valores reservados para este fin, obteniendo bajos niveles de incertidumbre. Los mejores resultados se obtienen al entrenar una red neuronal con 25 neuronas en la capa oculta y un valor de regularización de 0,001, obteniendo un error de 5,4%y un RMSE de 0,0228.

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“…Increased demand for high yield point structural steels (>900 MPa) in the crane-building industry has led to the intensification of tests concerning the applicability of hybrid-welding technologies in the joining of various steel grades [ 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

Hybrid Welding (Laser–Electric Arc MAG) of High Yield Point Steel S960QL

Urbańczyk

Adamiec

2021

Materials

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The article discusses the effect of the hybrid-welding process (laser–electric arc MAG Metal Active Gas) on the structure and properties of butt joints (having various thicknesses, i.e., 5 mm and 7 mm) made of steel S960QL. Welding tests were performed in the flat position (PA) and in the horizontal position (PC). Joints made of steel S960QL in the above-presented configuration are present in elements of crane structures (e.g., telescopic crane jibs). The welding tests involved the use of the G Mn4Ni1.5CrMo solid electrode wire and the Ar+18% CO2 shielding gas mixture (M21) (used in the MAG method). Non-destructive visual and radiographic tests did not reveal the presence of any welding imperfections in the joints. The welded joints obtained in the tests represented quality level B in accordance with the requirements of the ISO 12932 standard. Microscopic metallographic tests revealed that the heat-affected zone (HAZ) contained the coarse-grained martensitic structure resulting from the effect of the complex welding thermal cycle on the microstructure of the joints. Destructive tests revealed that the joints were characterised by tensile strength similar to that of the base material. The hybrid welding (laser–MAG) of steel S960QL enabled the obtainment of joints characterised by favourable plastic properties and impact energy exceeding 27 J. The tests revealed the possibility of making hybrid-welded joints satisfying the quality-related requirements specified in the ISO 15614-14 standard.

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Laser-Arc hybrid welding perspective ultra-high strength steels: influence of the chemical composition of weld metal on microstructure and mechanical properties

Cited by 14 publications

References 10 publications

Laser Hybrid Butt Welding of Large Thickness Naval Steel

Laser Hybrid Butt Welding of Large Thickness Naval Steel

Modelación empírica de la conductividad térmica para un grupo de aceros

Hybrid Welding (Laser–Electric Arc MAG) of High Yield Point Steel S960QL

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