Effects of laser beam energy and incident angle on the pulse laser welding of stainless steel thin sheet

Liao, Yi‐Chun; Yu, Ming-Huei

doi:10.1016/j.jmatprotec.2007.03.102

Cited by 73 publications

(32 citation statements)

References 9 publications

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“…is means that the ow of the weld pool is directional, and the material is isotropic in simulation. Combining with the literature [10][11][12], Table 5 shows the simulation error of six heat source modes about laser welding of the stainless steel Advances in Materials Science and Engineering 7…”

Section: Simulation Resultsmentioning

confidence: 99%

“…e results show that the bead width and depth of penetration decrease as the welding speed increases. Liao and Yu [10] investigate that effect of the pulsed Nd : YAG laser welding incident angle on the depth of penetration, bead width, and bead length, and the results show that the bead width and depth of penetration decrease with the increase in incident angle. Balasubramanian et al [11] conduct experiments using a three-dimensional conical Gaussian heat source and the temperature-dependent thermophysical properties of the A304 stainless steel sheet to be employed for performing a nonlinear transient thermal analysis.…”

Section: Introductionmentioning

confidence: 99%

“…Laser welding is a complex physical and chemical process, and many researchers have done a lot of research on this process [9][10][11][12][13]. However, the study of the welding temperature field is a prerequisite for the analysis of welding stress and deformation [1].…”

Section: Introductionmentioning

confidence: 99%

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Research on Heat Source Model and Weld Profile for Fiber Laser Welding of A304 Stainless Steel Thin Sheet

Fan

Zhang³

et al. 2018

Advances in Materials Science and Engineering

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A heat source model is the key issue for laser welding simulation. e Gaussian heat source model is not suitable to match the actual laser weld profile accurately. Furthermore, fiber lasers are widely recognized to result in good-quality laser beam output, a narrower weld zone, less distortion, and high process efficiency, compared with other types of lasers (such as CO 2 , Nd : YAG, and diode lasers). At present, there are few heat source models for fiber laser welding. Most of researchers evaluate the weld profile only by the bead width and depth of penetration, which is not suitable for the laser keyhole welding nail-like profile. is paper reports an experimental study and FEA simulation of fiber laser butt welding on 1 mm thick A304 stainless steel. A new heat source model (cylindrical and cylindrical) is established to match the actual weld profile using Marc and Fortran software. Four bead geometry parameters (penetration depth, bead width, waist width, and depth of the waist) are used to compare between the experimental and simulation results. e results show that the heat source model of cylindrical and cylindrical can match the actual shape of the fiber laser welding feasibly. e error range of the penetration depth, bead width, waist width, and depth of the waist between experimental and simulation results is about 4.1 ± 1.6%, 2.9 ± 2.0%, 13.6 ± 7.4/%, and 18.3 ± 8.0%, respectively. In addition, it is found that the depth of penetration is more sensitive to laser power rather than bead width, waist width, and depth of the waist. Welding speed has a similar influence on the depth of penetration, weld width, waist width, and depth of the waist.

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Section: Simulation Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Research on Heat Source Model and Weld Profile for Fiber Laser Welding of A304 Stainless Steel Thin Sheet

Fan

Zhang³

et al. 2018

Advances in Materials Science and Engineering

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“…Again, the ANOVA tables for the resistance length model and melting ratio model show that all two linear terms, i.e., offset and laser incident angle and two-factor interactions (2FI) of offset-angle (O-A), are significant model terms. From the results shown in Tables 6,7,8,9,10,and 11, it is, therefore, apparent that the developed statistical models for predicting resistance length and melting ratio are fairly accurate and can be of following forms: Normality of residual data and amount of residuals in prediction are then checked to ensure statistical validation of the developed models. The normality of data is verified by plotting the normal probability plot (NPP) of residuals.…”

Section: Development Of Mathematical Modelsmentioning

confidence: 99%

“…Liao et al [11] studied the effects of pulse energy and incident angle on the cross-sectional size and shape of the welded bead. Their study illustrated that laser incidence angle along with the laser energy is an important parameter for controlling the geometry of the welded spot.…”

Section: Introductionmentioning

confidence: 99%

The influence of laser welding configuration on the properties of dissimilar stainless steel welds

Romoli

Rashed

2015

Int J Adv Manuf Technol

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Laser beam welding of dissimilar ferritic/ martensitic stainless steels was performed in constrained butt joint configuration with the objective of identifying the influence of the melting ratio between the two base metals on the ultimate shear strength of the welds. Based on a full factorial design, experiments demonstrated that varying the incidence angle up to 45°and offsetting the focal position with respect to the materials' interface within the limits imposed by the laser spot diameter are a reliable method to control the melting ratio and maintaining the expected resistance length at the material interface. The weld configuration parameters were correlated by means of the analysis of variance (ANOVA) method with shear resistance length and the melting ratio: the incidence of surface cracks can be significantly reduced increasing the ferritic steel area, involved in the formation of seam, over 60 % of the whole melt zone. Push-out tests performed on the specimens revealed that such a configuration has beneficial aspects on the ultimate shear strength of the seam meaning that the prevailing effect is the decreased brittleness of the weld by decreasing its carbon content under 0.5 % in weight.

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Laser Welding of Thin Ferrous Sheets with Ferrous and Non‐Ferrous Sheets

Waghmare,

Saha

2024

Laser‐Assisted Machining

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Effects of laser beam energy and incident angle on the pulse laser welding of stainless steel thin sheet

Cited by 73 publications

References 9 publications

Research on Heat Source Model and Weld Profile for Fiber Laser Welding of A304 Stainless Steel Thin Sheet

Research on Heat Source Model and Weld Profile for Fiber Laser Welding of A304 Stainless Steel Thin Sheet

The influence of laser welding configuration on the properties of dissimilar stainless steel welds

Laser Welding of Thin Ferrous Sheets with Ferrous and Non‐Ferrous Sheets

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