Single Pass Laser Welding with Multiple Spots to Join Four Sheets in a Butt-joint Configuration

Kristiansen, Morten; Hansen, K. S.; Langbak, Andreas; Johansen, Sebastian Blegebrønd; Krempin, Simon Borup; Hornum, Mattias Døssing

doi:10.1016/j.phpro.2017.08.021

Cited by 3 publications

(5 citation statements)

References 10 publications

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“…For a row of multiple spots, they obtained equal penetration depth if the edge spots have 5%-10% more power than the center spots. Beam splitting, produced by a high-power fiber laser apparatus, was used to butt-weld four stainless sheets placed in a complex geometry [51]. The pattern utilized for the multiple beams was side-by-side, characterized by three spots for each of the three joints to be welded.…”

Section: Laser Beam Weldingmentioning

confidence: 99%

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

Giudice,

Missori,

Scolaro

et al. 2024

Preprint

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Dissimilar welds between ferritic and austenitic steels represent a good solution for exploiting the best performance of stainless steels at high and low temperatures and in aggressive environments, while minimizing costs. Therefore, they are widely used in nuclear and petrochemical plants, however, due to the different properties of the steels involved, the welding process can be challenging. Fusion welding can be specifically addressed to connect low-carbon, or low-alloy steels, with high-alloy steels, which have similar melting point. Welding of thick plates can be performed with electric arc in multiple passes or in a single pass by means of a laser beam equipment. Since microstructure and consequently mechanical properties of the weld are closely related to composition, the choice of the filler metal and processing parameters, which in turn affects the dilution rate, plays a fundamental role. Numerous technical solutions were proposed for welding dissimilar steels and much research was developed on the weldment metallurgy; therefore, this article is aimed at a review of the most recent scientific literature on the issues relating to the fusion welding of ferritic / austenitic steels. Two specific sections are dedicated respectively to electric arc and laser beam welding; finally, metallurgical issues, related to dilution and thermal field are debated in the discussion section.

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Section: Laser Beam Weldingmentioning

confidence: 99%

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

Giudice,

Missori,

Scolaro

et al. 2024

Preprint

View full text Add to dashboard Cite

show abstract

“…For a row of multiple spots, they obtained an equal penetration depth if the edge spots had 5%-10% more power than the center spots. Beam splitting, produced by a high-power fiber laser apparatus, was used to butt-weld four stainless steel sheets placed in a complex geometry [52]. The pattern utilized for the multiple beams was side-by-side, characterized by three spots for each of the three joints to be welded.…”

Section: Laser Beam Weldingmentioning

confidence: 99%

“…to butt-weld four stainless steel sheets placed in a complex geometry [52]. The pattern utilized for the multiple beams was side-by-side, characterized by three spots for each of the three joints to be welded.…”

Section: Laser Beam Weldingmentioning

confidence: 99%

A Review on Fusion Welding of Dissimilar Ferritic/Austenitic Steels: Processing and Weld Zone Metallurgy

Giudice,

Missori,

Scolaro

et al. 2024

JMMP

View full text Add to dashboard Cite

Dissimilar welds between ferritic and austenitic steels represent a good solution for exploiting the best performance of stainless steels at high and low temperatures and in aggressive environments, while minimizing costs. Therefore, they are widely used in nuclear and petrochemical plants; however, due to the different properties of the steels involved, the welding process can be challenging. Fusion welding can be specifically applied to connect low-carbon or low-alloy steels with high-alloy steels, which have similar melting points. The welding of thick plates can be performed with an electric arc in multiple passes or in a single pass by means of laser beam equipment. Since the microstructure and, consequently, the mechanical properties of the weld are closely related to the composition, the choice of the filler metal and processing parameters, which in turn affect the dilution rate, plays a fundamental role. Numerous technical solutions have been proposed for welding dissimilar steels and much research has developed on welding metallurgy; therefore, this article is aimed at a review of the most recent scientific literature on issues relating to the fusion welding of ferritic/austenitic steels. Two specific sections are dedicated, respectively, to electric arc and laser beam welding; finally, metallurgical issues, related to dilution and thermal field are debated in the discussion section.

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Section: Laser Beam Shaping In Processes Relevant To L‐pbfmentioning

confidence: 99%

“…Researchers in LW and related processes recognized beam shaping as a promising solution to overcome problems such as limited process window, [50] process efficiency, [55,58] and surface roughness. [55,152,153] In LW, beam shaping enables the modulation of heat distribution at the interaction point of the laser and material and controls the melting and solidification behavior. [50][51][52] Rasch et al [50] conducted a comprehensive investigation, combining experimental and numerical methods, to examine the impact of laser beam shapes on the process stability and dynamics, melt pool geometry, and surface roughness of aluminumcopper alloy weld tracks in the context of heat conduction mode welding.…”

Section: Laser Beam Shaping In Processes Relevant To L-pbfmentioning

confidence: 99%

A Review on Laser Beam Shaping Application in Laser‐Powder Bed Fusion

Bakhtari,

Sezer,

Canyurt

et al. 2024

Adv Eng Mater

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Laser powder bed fusion (L‐PBF) is extensively adopted in the aerospace and automobile industries for producing metallic components. The L‐PBF process involves rapid melting and solidification of metallic powders using a laser source to produce dense parts. Most industrial L‐PBF systems use a fiber‐based laser source that emits a Gaussian beam distribution. However, the conventional Gaussian beam used in L‐PBF processes presents inherent limitations that can impact the quality and properties of the final products. This review aims to provide a theoretical background of laser beam shaping techniques and explores the application of alternative beam shapes in L‐PBF. It investigates how different beam profiles affect the melt pool geometry, process stability, productivity, mechanical properties, microstructure, and surface roughness of fabricated parts. Additionally, it discusses different types of beam‐shaping techniques and elements utilized to generate distinct beam shapes. Furthermore, different constraints and limitations that hinder the full exploitation of beam shaping are critically discussed. By analyzing the impact of beam shaping in L‐PBF, this review provides insight into optimizing the AM process, enhancing part quality, and improving processing performance. It will also help readers to overview the research gaps, challenges, and promising future directions in laser beam shaping applications in L‐PBF.This review comprehensively covers and presents the current research trend of laser beam shaping applications in L‐PBF. It delves into the opportunities, challenges, limitations, and futures prospects of beam shaping applications. Furthermore, presents the methods and techniques used to modulate the laser beam profile, including spatial and temporal.This article is protected by copyright. All rights reserved.

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Single Pass Laser Welding with Multiple Spots to Join Four Sheets in a Butt-joint Configuration

Cited by 3 publications

References 10 publications

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

A Review on Fusion Welding of Dissimilar Ferritic / Austenitic Steels: Processing and Weld Metallurgy

A Review on Fusion Welding of Dissimilar Ferritic/Austenitic Steels: Processing and Weld Zone Metallurgy

A Review on Laser Beam Shaping Application in Laser‐Powder Bed Fusion

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