scholarly journals Correction to: Numerical simulation of convex shape beam spot on stress field of plasma-sprayed MCrAlY coating during laser cladding process

2021 ◽  
Author(s):  
Peipei Zhang ◽  
Jiaqing Chu ◽  
Guang Qu ◽  
Dongsheng Wang
Keyword(s):  
Numerical Simulation ◽  
Stress Field ◽  
Laser Cladding ◽  
Beam Spot ◽  
Convex Shape ◽  
Mcraly Coating ◽  
Laser Cladding Process ◽  
Plasma Sprayed

scholarly journals Numerical Simulation of Convex Shape Beam Spot on Stress Field of Plasma-sprayed MCrAlY Coating During Laser Cladding Process

2021 ◽  
Author(s):  
Peipei Zhang ◽  
Jiaqing Chu ◽  
Guang Qu ◽  
Dongsheng Wang
Keyword(s):  
Numerical Simulation ◽  
Thermal Stress ◽  
Laser Cladding ◽  
Laser Energy ◽  
Beam Spot ◽  
Convex Shape ◽  
Laser Cladding Process ◽  
Clad Layer ◽  
Cooling Effects ◽  
Plasma Sprayed

Abstract In order to reduce the thermal stress at clad layer and further reduce the crack generation in the laser cladding process, a method of controlling the cracks at clad layer by changing the laser energy density was proposed. The comparative thermal-mechanical coupling finite element analysis was conducted for the uniform rectangular spot and convex shape beam spot cladding processes on plasma-sprayed MCrAlY coating through the numerical simulation method based on the ANSYS software. The results show that the rapid heating and cooling characteristics, which are typical in laser processing, are manifested in the cladding process using the uniform rectangular spot, and the convex shape spot can exert the preheating and slow cooling effects to a certain extent, so as to reduce the temperature gradient of the cladding zone and non-cladding zone. In addition, on the precondition of equivalent cladding effect, the thermal stress at the clad layer is also low, so the cracking tendency of the clad layer can be effectively mitigated. Relative to the laser beam shaped diffractive optical element special for design and manufacturing, superposing two uniform rectangular spots with different sizes and energy densities is a simpler and more effective method of acquiring the convex shape spot.

Numerical Simulation of Feeding Powder Laser Cladding Temperature Field Based on ANSYS

2013 ◽  
Vol 690-693 ◽  
pp. 3334-3337
Author(s):  
Cheng Fa Song ◽  
Ming Di Wang
Keyword(s):  
Numerical Simulation ◽  
Cooling Rate ◽  
Laser Cladding ◽  
Simulation Method ◽  
Conduction Model ◽  
Beam Position ◽  
Life And Death ◽  
Laser Cladding Process ◽  
Calculation Results ◽  
Cladding Layers

The numerical simulation method of LCRM Using Coaxial Inside-Beam Powder Feeding is put forward in this page. LCRM conduction model is established, the life and death unit to be used to simulate the real laser cladding process. Calculation results show that the molten pool temperature will gradually increase with the number of cladding layers increase; the highest temperature at the point of application of the laser beam position later; in the cladding process, cooling rate is great in high temperature period, and in low temperature section, cooling rate relatively slight.

scholarly journals Progress in numerical simulation of the laser cladding process

2019 ◽  
Vol 122 ◽  
pp. 151-163 ◽  
Author(s):  
Nusrat Tamanna ◽  
Roger Crouch ◽  
Sumsun Naher
Keyword(s):  
Numerical Simulation ◽  
Laser Cladding ◽  
Laser Cladding Process

The Numerical Simulation Analysis of Laser Cladding Layer Stress Field with UIT

Applied laser ◽  
2015 ◽  
Vol 35 (3) ◽  
pp. 288-294 ◽  
Author(s):  
张颖 Zhang Ying ◽  
戚永爱 Qi Yongai ◽  
梁绘昕 Liang Huixin ◽  
沈理达 Shen Lida ◽  
田宗军 Tian Zongjun
Keyword(s):  
Numerical Simulation ◽  
Stress Field ◽  
Laser Cladding ◽  
Simulation Analysis ◽  
Cladding Layer

Numerical Simulation of Multi-Track Laser Cladding Process

2011 ◽  
Vol 399-401 ◽  
pp. 1802-1805 ◽  
Author(s):  
Jin Wu Kang ◽  
Tian You Huang ◽  
An Feng Zhang ◽  
Di Chen Li
Keyword(s):  
Numerical Simulation ◽  
Surface Roughness ◽  
Heat Source ◽  
Laser Cladding ◽  
Experimental Results ◽  
Laser Spot ◽  
Laser Cladding Process ◽  
Clad Layer ◽  
Overlap Ratio ◽  
Good Agreement

Multi-track laser cladding is necessary in the forming of parts. The overlap between neighbor tracks plays an important role, which determines the quality and surface smoothness of the clad layer. In this paper, numerical simulation of the multi-track laser cladding process is studied. The heat source of laser spot is applied by updating the profile of clad region and the location of the moving laser spot. The clad profile of overlapped track was obtained, from which the surface roughness was analyzed by the variation of overlap ratio. Meanwhile, experiments were carried out to evaluate the effect of overlap ratio. The simulated and the experimental results are in good agreement; both show that there is an optimal overlap ratio to achieve best surface roughness.

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