Effect of different laser scanning sequences on temperature field and deformation of laser cladding

Liu, Weiwei; Saleheen, Kazi Mojtaba; Al-Hammadi, Gamal; Daaim, Muhammad; Abdelrahman, Ahmed; Xue, Lin; Hua, Shungang; Wang, Feng-Tao

doi:10.1117/1.oe.61.4.046107

Cited by 3 publications

(1 citation statement)

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“…The current numerical simulation of laser cladding is mainly limited to a single module or two modules for modeling. Liu Wei-Wei et al combined the temperature field with the stress field to investigate the effect of three different scanning methods of laser cladding on the deformation of the parts, and the results showed that the same direction of the cladding layer can make the temperature field more uniform and reduce the deformation of the parts [ 25 ]. Liu Huaming et al developed a finite element model of the temperature and stress fields of single-pass laser cladding, and the results showed that the laser power and scanning speed play a major role in the variation of the temperature and stress fields [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study of Multi-Field Coupling for Laser Cladding of Shaft Parts

Zhao

Yang

et al. 2023

Micromachines

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Since shaft parts operate under harsh environments for a long time, many critical parts suffer from corrosion, wear and other problems, leading to part failure and inability to continue in service. It is imperative to repair failed parts and increase their service life. An orthogonal experimental scheme is designed to numerically simulate the process of laser cladding of Inconel 718 alloy powder on 4140 alloy structural steel based on the ANSYS simulation platform, derive the relationship equation of cladding layer thickness according to the heat balance principle, establish a finite element model, couple three modules of temperature field, stress field and fluid field, and analyze different modules to realize the monitoring of different processes of laser cladding. The optimal cladding parameters were laser power 1000 W, scanning speed 15 rad/s, spot radius 1.5 mm, thermal stress maximum value of 696 Mpa, residual stress minimum value of 281 Mpa, and the degree of influence of three factors on thermal stress maximum value: laser power > spot radius > scanning speed. The pool in the melting process appears to melt the “sharp corner” phenomenon, the internal shows a double vortex effect, with a maximum flow rate of 0.02 m/s. The solidification process shows a different shape at each stage due to the different driving forces. In this paper, multi-field-coupled numerical simulations of the laser cladding process were performed to obtain optimal cladding parameters with low residual stresses in the clad layer. The melt pool grows and expands gradually during melting, but the laser loading time is limited, and the size and shape of the melt pool are eventually fixed, and there is a vortex flowing from the center to both sides of the cross-section inside the melt pool, forming a double vortex effect. The solidification is divided into four stages to complete the transformation of the liquid phase of the melt pool to the solid phase, and the cladding layer is formed. The multi-field-coupled numerical simulation technique is used to analyze the temperature, stress and fluid fields to provide a theoretical basis for the residual stress and surface quality of the clad layer for subsequent laser cladding experiments.

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Section: Introductionmentioning

confidence: 99%

Numerical Simulation Study of Multi-Field Coupling for Laser Cladding of Shaft Parts

Zhao

Yang

et al. 2023

Micromachines

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Tailoring laser cladding paths for improved coating performance: A comprehensive investigation

Liu,

Li,

Kang

et al. 2024

Optics Communications

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The Impact of Pre-Existing Surface Texture on Laser Cladding of 316L Cladding

Ma,

Du,

et al. 2024

Manufacturing Technology

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Laser cladding technology, a novel surface modification technique, is widely employed in tasks such as metal surface strengthening and repair. However, the quality post-cladding often falls short of usage requirements, harbouring defects like cracks and pores. In pursuit of a crack-free cladding method, surface texture technology is integrated with laser cladding technology to establish a multi-field coupled numerical simulation model. This model investigates the temperature, stress, and fluid fields during laser cladding with and without texture, aiming to identify the optimal cladding parameters. The results indicate that the optimal cladding parameters are a laser power of 1200 W, a scanning speed of 7 mm.s -1 , and a spot radius of 2 mm. In comparison with cladding without texture, the minimum temperature has increased by approximately 50 %, while the peak temperature has remained almost unchanged. The maximum residual stress of the cladding layer without texture is 369.46 MPa, whereas that of the cladding layer with pre-set texture is 338.46 MPa, representing a reduction of approximately 8.39 %. The bottom of the cladding layer has decreased by about 29.1 %, effectively enhancing the mechanical properties at the metallurgical bond of the cladding layer. The pre-set texture induces a decreasing trend in the flow velocity inside the molten pool, eliminating the double-vortex effect, resulting in a more uniform temperature distribution within the molten pool, consequently reducing the residual stress of the cladding layer. This paper employs multi-field coupled numerical simulation technology to monitor the internal state of the molten pool, offering insights for enhancing the quality of the cladding layer in subsequent endeavours.Laser cladding Surface texture Multi-field coupled Residual stress

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Effect of different laser scanning sequences on temperature field and deformation of laser cladding

Cited by 3 publications

References 0 publications

Numerical Simulation Study of Multi-Field Coupling for Laser Cladding of Shaft Parts

Numerical Simulation Study of Multi-Field Coupling for Laser Cladding of Shaft Parts

Tailoring laser cladding paths for improved coating performance: A comprehensive investigation

The Impact of Pre-Existing Surface Texture on Laser Cladding of 316L Cladding

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