Microstructure and mechanical properties of low power pulsed Nd:YAG laser welded S700MC steel

Khanigi, Alireza Fayazi; Farnia, Amirreza; Ardestani, Mohammad; Torkamany, M.J.

doi:10.1007/s12046-020-1279-6

Cited by 15 publications

(9 citation statements)

References 28 publications

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“…In terms of mechanical properties, the optimisation of the welding parameters (laser power and pulse duration) performed in DP600 steel generated true stress values in the weld very similar to the BM (between 700 and 800 MPa), and the failures did not occur in the FZ [57]. An- [52]; St14 steel (D), and its FZ (E) [53]; AISI 1005 (F), and its HAZ (G) and FZ (H) [21]; S700MC steel (I), and its HAZ (J) and FZ (K) [54]; and twinning induced plasticity (TWIP) steel (L) and its electron back-scatter diffraction (EBSD) map (M) [55].…”

Section: Dual Phase (Dp)mentioning

confidence: 91%

“…When the process was applied to S700MC high-strength low-alloy steel (HSLA), the weld region showed equiaxed grains at the centre surrounded by columnar grains near the base metal. The difference in the cooling rates in each zone was associated with low rates in the centre and high rates in the adjacent area (Figure 7I-K) [54]. The high undercooling rates developed by the process promoted the transformation to grain boundary ferrite, acicular ferrite, Widmanstätten, bainite, and lath martensite.…”

Section: Dual Phase (Dp)mentioning

confidence: 96%

“…Otherwise, lath martensite with columnar grains was noted in the bottom region (Z1), corresponding to the single thermal cycle of the pulsed laser. [53]; AISI 1005 (F), and its HAZ (G) and FZ (H) [21]; S700MC steel (I), and its HAZ (J) and FZ (K) [54]; and twinning induced plasticity (TWIP) steel (L) and its electron back-scatter diffraction (EBSD) map (M) [55].…”

Section: Low Alloy and Carbon Steelsmentioning

confidence: 99%

“…Figure 7. Pulsed laser weldments made of low alloy and carbon steels: St37 steel (A), and its heataffected zone (HAZ) (B) and FZ (C)[52]; St14 steel (D), and its FZ (E)[53]; AISI 1005 (F), and its HAZ (G) and FZ (H)[21]; S700MC steel (I), and its HAZ (J) and FZ (K)[54]; and twinning induced plasticity (TWIP) steel (L) and its electron back-scatter diffraction (EBSD) map (M)[55].…”

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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: Dual Phase (Dp)mentioning

confidence: 91%

Section: Dual Phase (Dp)mentioning

confidence: 96%

Section: Low Alloy and Carbon Steelsmentioning

confidence: 99%

mentioning

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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“…As observed from this experiment, pulsed energy plays an important in producing a deeper weld penetration. Higher pulsed energy creates higher heat input at a constant welding speed for a weld, which is increasing the weld pool size [13]. The bead width and penetration depth increase as the pulse energy increases.…”

Section: The Effect Of Pulsed Energy Epmentioning

confidence: 99%

Pulsed Nd: YAG Laser Parameters Effect on Welding Uncoated Advance High Strength Steel (AHSS) for Automotive

Salleh

Ishak

Yamasaki

et al. 2021

ARFMTS

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Pulse wave (PW) welding technique has become more adequate process to produce a deep penetration welding with smaller fusion zone and heat affected zone for automotive steel joint. A 1.6 mm thickness of N22CB boron steel from advance high strength steel (AHSS) type was welded by using PW mode from a low power Nd: YAG laser. The process parameters studied in this paper are pulsed energy, Ep, focal length, F, and welding speed, S. Bead-on-plate (BOP) welding was used in this experiment. The effect of parameters on the weld pool geometry was studied. Higher pulsed energy gives high weld penetration and higher weld width, contributing to the bigger weld pool size. Positive defocus position of focal length produces weld geometry with high penetration depth and smaller bead width compared to negative defocus position. Lower welding speed could produce deep penetration depth as the high heat input produced.

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