Effects of different laser power and welding speed on the microstructure and mechanical properties of TRIP joints in laser-TIG arc hybrid lap filler wire welding

Lang, Qiang; Zhang, Xianlong; Song, Gang; Liu, Liming

doi:10.1016/j.mtcomm.2021.102925

Cited by 8 publications

(5 citation statements)

References 17 publications

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“…Several authors studied the laser welding of TRIP steels. Most of the papers were devoted to the laser welding characteristics of TRIP780 [17,23] and TRIP800 steels [13,15,19], but some authors also studied the TRIP steels with a tensile strength of 600 MPa [18] and above 1000 MPa [2,26]. As they welded either the same grade of TRIP steels or TRIP steels with DP steels, the results regarding the HAZs of TRIP steels are mainly comparable to our research.…”

Section: Introductionsupporting

confidence: 85%

“…This makes TRIP steel greatly beneficial for energy absorption and better in car crash situations than other AHSS grades. Because of their high strength and ductility and good impact absorption formation, TRIP steels are widely used in anti-collision components, such as frame rails, reinforcing plates, absorption boxes, roof rails, engine cradles, front and rear rails, seat frames, and anti-collision beams [2,5,13,[15][16][17][18][19][20].…”

Section: Introductionmentioning

confidence: 99%

“…He observed the formation of predominantly martensite with a hardness of 520 ± 17 HV in both FZ and HAZ [15]. Lang [18] laser welded TRIP steel with a strength of 600 MPa using Nd:YAG pulsed solidstate laser. Acicular cementite, massive ferrite, layered pearlite, and granular bainite were mainly observed in the joint [19].…”

Section: Introductionmentioning

confidence: 99%

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Microstructure and mechanical properties of fibre laser welded joints of CP780 and TRIP690 steel

Švec,

Schrek,

Dománková

2024

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Fibre laser welding of CP780 and TRIP690 steel sheets with a thickness of 1.5 mm was evaluated. Sound welds were obtained at the heat input from 43.3 to 95.0 J mm −1 . The highest 488 and 476 HV0.1 microhardness values were measured in the coarse-grained HAZ of CP780 and TRIP690 steel, respectively. The microstructure in the fusion zone consisted mainly of martensite and lower bainite. The microstructure in the coarse-grained HAZs contained martensite, lower bainite, upper bainite, and retained austenite. The microstructure of the inter-critical HAZs consisted of martensite and ferrite with an increased portion of ferrite with the distance from the fusion zone. The softening regions were indicated in the sub-critical HAZs of both steels. Joint tensile strength exceeded the tensile strength of TRIP690 steel. The apparent elongation was concentrated mainly in TRIP690 steel because of the transformation strengthening of the weld region during the welding process.

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Section: Introductionsupporting

confidence: 85%

Section: Introductionmentioning

confidence: 99%

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Microstructure and mechanical properties of fibre laser welded joints of CP780 and TRIP690 steel

Švec,

Schrek,

Dománková

2024

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“…In addition, the combination of arc and laser energy increases process stability and productivity. When a laser is coupled with a electric arc, for example, higher welding speeds can be envisaged [11,12].…”

Section: Introductionmentioning

confidence: 99%

Influences of laser on the energy parameters of the electric arc in the case of laser-MIG hybrid welding

Bidi,

Le Masson,

Cicala

2024

Int J Adv Manuf Technol

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The work presented in this paper deals with the relationship between the laser and the electric arc during welding and chamfer lling operations using the hybrid laser welding process. This unconventional welding process requires perfect mastery, in order to increase the productivity and quality of welds, especially in nuclear facilities. Mastering the hybrid process involves a phase of understanding the phenomena involved in a welding operation. To better understand the role of each process in the combination of laser and MIG, we carried out a laser-only and MIG-only tests using the same operating parameters as those used in hybrid welding. Test results show that the laser preheats the surface, with some of the energy deposited on the side walls of the chamfer. The role of MIG is to deposit metal to ll the chamfer. We can therefore consider that its main role is to provide a volumetric energy deposit. Using the experimental design, we studied the in uence of ve parameters such as wire speed, distance between the laser and the MIG, welding speed, laser power and laser defocusing on the power of the MIG.The results show that the interaction between laser power and wire speed has the greatest effect on arc power, followed by wire speed and other interactions. To verify the arc energy values given by the FRONIUS generator, we carried out additional measurements using a SEFRAM device. The results measured by FRONIUS are always higher than those of SEFRAM. Both series of measurements follow the same variations.

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“…Lang and colleagues conducted research on the impact of various laser powers and welding speeds on the deformation of welded joints. The results indicated that higher welding temperatures resulted in greater welding depth [23]. El-Sayed et al proposed that multi-pass friction stir processing can effectively solve the problem of premature onion cracking by accumulating higher strains to fully recrystallize the initial grains and improve the microstructure.…”

Section: Introductorymentioning

confidence: 99%

The Effect of TIG Welding Heat Input on the Deformation of a Thin Bending Plate and Its Weld Zone

Guo,

Hu,

Tang

et al. 2023

Coatings

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Heat input is a crucial parameter in the process of welding thin plates. It has a direct impact on the quality of the weld and the degree of deformation caused during welding. This study investigates the impact of heat input on the deformation of a thin bending plate and its weld zone using the thermoelastic–plastic finite element method. The accuracy of the model is ascertained using the non-contact inspection method utilizing digital image correlation technology. The welding deformation patterns of thin bending plates with a radius of 500 mm were analyzed at various welding heat inputs ranging from 173 J/mm to 435 J/mm. The results indicate that the finite element prediction model proposed in this paper is highly accurate. It has been observed that, under this range of thermal input, the thin bent plates undergo saddle deformation. By examining the correlation between heat input and the maximum deformation outside of the plane, it has been determined that a heat input of at least 50 J/mm is required for the thin bending plate to experience out-of-plane deformation. Additionally, as the level of heat input increases, so too does the out-of-plane deformation of the thin bending plate. After the completion of the welding cooling process, the transverse shrinkage at the weld seam of the thin bend plate is twice that of the longitudinal shrinkage. However, the transverse deformation of the bend plate is not significantly different from the longitudinal deformation.

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Effects of different laser power and welding speed on the microstructure and mechanical properties of TRIP joints in laser-TIG arc hybrid lap filler wire welding

Cited by 8 publications

References 17 publications

Microstructure and mechanical properties of fibre laser welded joints of CP780 and TRIP690 steel

Microstructure and mechanical properties of fibre laser welded joints of CP780 and TRIP690 steel

Influences of laser on the energy parameters of the electric arc in the case of laser-MIG hybrid welding

The Effect of TIG Welding Heat Input on the Deformation of a Thin Bending Plate and Its Weld Zone

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