Microstructure development in Pulsed Laser Welding of Dual Phase Steel to Aluminium Alloy

Indhu, R; Divya, Sasidharan Padmaja; Tak, Manish; Santhanakrishnan, Soundarapandian

doi:10.1016/j.promfg.2018.07.058

Cited by 22 publications

(30 citation statements)

References 15 publications

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“…The solubility of Fe in Al is almost zero, and the solid-state solubility of Al into Fe is low [100]. As a result, the mixture of these materials causes the diffusion of Al and Fe atoms at the interface, forming Fe-Al intermetallic compounds (IMC) such as Fe-rich phases (FeAl and Fe 3 Al) and Al-rich phases (FeAl 2 , Fe 2 Al 5 , and FeAl 3 ) [20,101,102]. These compounds are known as brittle and hard phases, with Fe-rich compound hardness reaching ranges between 250 and 520 HV, and Al-rich phases from 820 to 1100 HV [101].…”

Section: Aluminiummentioning

confidence: 99%

“…This characteristic can deteriorate the weld, and mitigating these intermetallics could enhance quality and strength. The pulse laser process can deliver some advantages to overcome this particularity due to the low heat input involved, as well as the minimised volume of HAZ and the thermal stress [20].…”

Section: Aluminiummentioning

confidence: 99%

“…Owing to achieving a sound joint, Indhu et al [20] studied the joint of AA6061 and galvanised DP600 steel in an overlap configuration (Figure 15A,B). The FZ showed small micro-cracks along with Fe 2 Al 5 phases.…”

Section: Aluminiummentioning

confidence: 99%

“…Pulsed laser weldments made of dissimilar aluminium alloys: DP 600 steel and AA6061 (A) and its FZ (B) [20], AA5754 and St14 steel (C) and its weld interface (D) [101], 316L and AA1060 (E) and its weld interface (F) [87], and AA1050 and DP1000 steel (G) and its weld interface (H) [103].…”

Section: Figure 15mentioning

confidence: 99%

“…Therefore, the series of pulsed fusion zones overlapped generates the weld seam [15][16][17][18]. Even with the high peak power of each pulse, the intermittent configuration conducts a low average power [11,19,20]. Moreover, the behaviour of lower heat input and sharply high energy focused provokes minor disturbances in the materials, developing welding seams with condensed melting and affected areas [9,21].…”

Section: Introduction 1descriptionmentioning

confidence: 99%

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Pulsed Laser Welding Applied to Metallic Materials—A Material Approach

Chludzinski

Santos

Churiaque

et al. 2021

Metals

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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.

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Section: Aluminiummentioning

confidence: 99%

Section: Aluminiummentioning

confidence: 99%

Section: Aluminiummentioning

confidence: 99%

Section: Figure 15mentioning

confidence: 99%

Section: Introduction 1descriptionmentioning

confidence: 99%

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Pulsed Laser Welding Applied to Metallic Materials—A Material Approach

Chludzinski

Santos

Churiaque

et al. 2021

Metals

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Comparison of continuous and pulsed wave lasers in keyhole welding of stainless-steel to aluminium

Coroado

Ganguly

Williams

et al. 2021

Int J Adv Manuf Technol

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A continuous wave (CW) and a nanosecond pulsed wave (PW) lasers were used to join 1-mm thick sheets of SS304L (SS) austenitic stainless-steel to AA5251 (Al) aluminium alloy in an overlap joint configuration. The weld shape (penetration depth and width), intermetallic compounds concentration, weld quality (cracking and porosity) and mechanical strength were correlated with the process energy and compared between each laser temporal mode. Successful CW joints were produced with the SS sheet on top of the Al, but the opposite configuration revealed to be impossible for the range of parameters tested. The PW joints were successful with the Al sheet on top of SS, but all the joints cracked at the interface when the opposite configuration was used. The mechanical tests showed that even though it is possible to achieve higher tensile shear load in CW welds due to the larger bonding area, the tensile shear strength revealed to be almost 5 × higher for PW welds at similar applied energy.

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