Hot cracking in pulsed Nd:YAG laser welding of AA5456

Hekmatjou, Hamidreza; Naffakh-Moosavy, Homam

doi:10.1016/j.optlastec.2018.01.020

Cited by 49 publications

(17 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Among them, Nd:YAG displays a flexible beam delivered with industrial units commercially available [24,25]. The majority of the pulsed laser investigations have been performed with this system, probably due to the higher production efficiency and ability to control welding parameters [26]. The main experimental parameters in pulsed laser welding are peak power, pulse time, spot size, welding speed, and the distance between consecutive pulses [21,23,27,28].…”

Section: Introduction 1descriptionmentioning

confidence: 99%

Pulsed Laser Welding Applied to Metallic Materials—A Material Approach

Chludzinski

Santos

Churiaque

et al. 2021

Metals

View full text Add to dashboard Cite

Joining metallic alloys can be an intricate task, being necessary to take into account the material characteristics and the application in order to select the appropriate welding process. Among the variety of welding methods, pulsed laser technology is being successfully used in the industrial sector due to its beneficial aspects, for which most of them are related to the energy involved. Since the laser beam is focused in a concentrated area, a narrow and precise weld bead is created, with a reduced heat affected zone. This characteristic stands out for thinner material applications. As a non-contact process, the technique delivers flexibility and precision with high joining quality. In this sense, the present review addresses the most representative investigations developed in this welding process. A summary of these technological achievements in metallic metals, including steel, titanium, aluminium, and superalloys, is reported. Special attention is paid to the microstructural formation in the weld zone. Particular emphasis is given to the mechanical behaviour of the joints reported in terms of microhardness and strength performance. The main purpose of this work was to provide an overview of the results obtained with pulsed laser welding technology in diverse materials, including similar and dissimilar joints. In addition, outlook and remarks are addressed regarding the process characteristics and the state of knowledge.

show abstract

Section: Introduction 1descriptionmentioning

confidence: 99%

Pulsed Laser Welding Applied to Metallic Materials—A Material Approach

Chludzinski

Santos

Churiaque

et al. 2021

Metals

View full text Add to dashboard Cite

show abstract

“…So, laser welding has been considered potentially replace with other commonly used fusion welding techniques such as resistance and arc welding (Sharma and Molian 2011; Yuce et al 2017;Mohammadpour et al 2018 ). Also, pulsed Nd:YAG laser welding has several advantages over the other laser sources because of control the laser parameters precisely including pulse duration and pulse frequency (Hekmatjou and Naffakh-Moosavy 2018).…”

Section: Introductionmentioning

confidence: 99%

Microstructure and mechanical properties of similar and dissimilar laser welds of dp600 and dp1000 steel sheets used in the automotive industry

Tunçel

Aydın

Çetin

2021

Turkish Journal of Engineering

View full text Add to dashboard Cite

Dual-phase (DP) steel sheets are the most widely used steel group in the automotive industry. When these steel sheets are used in car body components, welding is inevitably needed during the manufacturing process. Although the resistance spot welding (RSW) is the most widely used welding method in the automotive industry, the newly popular laser welding has gained more importance in the welding of these steel grades in recent years. In this work, the DP600 and DP1000 steel sheets were joined as double-sided with the pulsed Nd: YAG (Neodymiumdoped Yttrium Aluminum Garnet (Y3Al5O12)) laser welding. Performing similar or dissimilar weld of DP steel sheets is an inevitable demand in the modern automotive industry. So, in this study similar (DP600-DP600, DP1000-DP1000) and dissimilar (DP600-DP1000) steel sheets were welded in the flat position with the butt joint. In order to evaluate welding performance, microstructural studies and mechanical tests were performed, and experiments carried out in this context include optical microscope studies, tensile tests and Vickers microhardness measurements. The tensile strength of the similar welded joints is a little bit lower than the base metals (BM). But, for dissimilar weld, the tensile strength is even lower than DP600-DP600 joint. And the microstructure of the welded joints are composed of martensite, retained austenite and bainite in the fusion zone and a mixture of martensite, bainite, ferrite, retained austenite and tempered martensite in heat affected zone (HAZ).

show abstract

“…In the current work, pulsed Nd: YAG laser was used. The advantage of Nd:YAG laser welding over other laser sources is that it can precisely control the laser parameters (Hekmatjou and Naffakh-Moosavy 2018). Therefore, it is crucial to choose the appropriate welding parameters because the parameters directly affect the weld quality.…”

Section: Introductionmentioning

confidence: 99%

Nd:YAG Lazer Kaynağı ile Birleştirilen Farklı Türdeki DP600-DP1000 Çeliklerinde Mekanik ve Mikroyapı Özellikleri

Tunçel

Aydın

Çetin

2020

Afyon Kocatepe University Journal of Sciences and Engineering

View full text Add to dashboard Cite

In this study, the DP600 and DP1000 steel sheets were joined with the pulsed Nd:YAG (Neodymium-doped Yttrium Aluminum Garnet (Y3Al5O12)) laser welding and, mechanical and microstructure properties of the dissimilar welds were experimentally investigated. As known, there is a demand in modern automotive industry for performing dissimilar weld of DP steel sheets. In the laser welding operation, the selection of welding parameters affects the final properties of welds substantially. So, the main aim of this study was determining the influence of pulse frequency on the mechanical properties of pulsed Nd:YAG laser welded DP600-DP1000 steel sheet joints. For this purpose, dissimilar (DP600-DP1000) steel sheets were doublesided welded with the butt joint. To analyze the welding performance, microstructural studies, tensile tests and microhardness measurements were carried out. The weld cross-sections of the joints revealed three main distinct macrostructural zones: Base metal and heat affected zone of both steels, and fusion zone. Moreover, a transition zone was observed between the base metal and heat affected zone on the DP1000 sides. Higher pulse frequency led to deeper penetration and larger fusion zone and heat affected zone. The laser welded joints without filler material had macro porosities in the fusion zones. The tensile strength of the joints significantly increased with increasing pulse frequency. The tensile strengths obtained in this study may be quite satisfactory for automotive industrial applications. Fusion zone had the highest microhardness values. However, the lower microhardness values than base material were measured in the transition zone on DP1000 side.

show abstract

Hot cracking in pulsed Nd:YAG laser welding of AA5456

Cited by 49 publications

References 14 publications

Pulsed Laser Welding Applied to Metallic Materials—A Material Approach

Pulsed Laser Welding Applied to Metallic Materials—A Material Approach

Microstructure and mechanical properties of similar and dissimilar laser welds of dp600 and dp1000 steel sheets used in the automotive industry

Nd:YAG Lazer Kaynağı ile Birleştirilen Farklı Türdeki DP600-DP1000 Çeliklerinde Mekanik ve Mikroyapı Özellikleri

Contact Info

Product

Resources

About