A comparative study of vision detection and numerical simulation for laser cladding of nickel-based alloy

2017 ◽  
Vol 28 ◽  
pp. 364-372 ◽  
Author(s):  
Yaowei Yong ◽  
Wei Fu ◽  
Qilin Deng ◽  
Dianbin Chen
Keyword(s):  
Numerical Simulation ◽  
Comparative Study ◽  
Laser Cladding ◽  
Nickel Based Alloy ◽  
Vision Detection

A Novel Grain Refinement Design to Inhibit Liquation Cracking in Laser Cladding Non-Weldable Nickel-Based Alloy

2020 ◽  
Author(s):  
Zhenlin Zhang ◽  
Yue Zhao ◽  
Jiguo Shan ◽  
Aiping Wu ◽  
Tokita Shun ◽  
...  
Keyword(s):  
Grain Refinement ◽  
Laser Cladding ◽  
Liquation Cracking ◽  
Nickel Based Alloy

Numerical Simulation on Temperature Field in Multi-Layers Inside-Beam Powder Feeding when Laser Cladding

2012 ◽  
Vol 499 ◽  
pp. 114-119 ◽  
Author(s):  
Ming Di Wang ◽  
Shi Hong Shi ◽  
X.B. Liu ◽  
Cheng Fa Song ◽  
Li Ning Sun
Keyword(s):  
Numerical Simulation ◽  
Heat Source ◽  
Laser Beam ◽  
Cooling Rate ◽  
Light Source ◽  
Laser Cladding ◽  
Laser Scanning ◽  
Initial Conditions ◽  
Cladding Layer ◽  
Powder Feeding

Numerical simulation of laser cladding is the main research topics for many universities and academes, but all researchers used the Gaussian laser light source. Due to using inside-beam powder feeding for laser cladding, the laser is dispersed by the cone-shaped mirror, and then be focused by the annular mirror, the laser can be assumed as the light source of uniform intensity.In this paper,the temperature of powder during landing selected as the initial conditions, and adopting the life-and-death unit method, the moving point heat source and the uniform heat source are realized. In the thickness direction, using the small melt layer stacking method, a finite element model has been established, and layer unit is acted layer by layer, then a virtual reality laser cladding manu-facturing process is simulated. Calculated results show that the surface temperature of the cladding layer depends on the laser scanning speed, powder feed rate, defocus distance. As cladding layers increases, due to the heat conduction into the base too late, bath temperature will gradually increase. The highest temperature is not at the laser beam, but at the later point of the laser beam. In the clad-ding process, the temperature cooling rate of the cladding layer in high temperature section is great, and in the low-temperature, cooling rate is relatively small. These conclusions are also similar with the normal laser cladding. Finally, some experiments validate the simulation results. The trends of simulating temperature are fit to the actual temperature, and the temperature gradient can also ex-plain the actual shape of cross-section.

scholarly journals Comparative Study of Co-based Alloys in Repairing Low Cr-Mo steel Components by Laser Cladding

2012 ◽  
Vol 39 ◽  
pp. 368-375 ◽  
Author(s):  
E. Díaz ◽  
J.M. Amado ◽  
J. Montero ◽  
M.J. Tobar ◽  
A. Yáñez
Keyword(s):  
Comparative Study ◽  
Laser Cladding

scholarly journals Numerical Simulation of a Textured and Untextured Photovoltaic Solar Cell: Comparative study

2021 ◽  
Vol 03 (01) ◽  
pp. 104-114
Author(s):  
Karim Salim ◽  
◽  
M.N Amroun ◽  
K Sahraoui ◽  
W Azzoui ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Solar Cells ◽  
Solar Cell ◽  
Comparative Study ◽  
Silicon Solar Cell ◽  
The Other ◽  
Surface Parameters ◽  
Cell Efficiency ◽  
Photovoltaic Solar Cell ◽  
A Cell

Increasing the efficiency of solar cells relies on the surface of the solar cell. In this work, we simulated a textured silicon solar cell. This simulation allowed us to predict the values of the surface parameters such as the angle and depth between the pyramids for an optimal photovoltaic conversion where we found the Icc: 1.783 (A) and Vco: 0.551 (V) with a cell efficiency of about 13.56%. On the other hand, we performed another simulation of a non-textured solar cell to compare our values and found Icc: 1.623 (A) and Vco: 0.556 (V) with an efficiency of about 12.76%.

Numerical simulation and experimental investigation of coaxiality change of laser cladding rotor shaft

2021 ◽  
Vol 60 (12) ◽  
Author(s):  
Shirui Guo ◽  
Junhao Yu ◽  
Lujun Cui ◽  
Yinghao Cui ◽  
Yanlong Cao ◽  
...  
Keyword(s):  
Numerical Simulation ◽  
Experimental Investigation ◽  
Laser Cladding ◽  
Rotor Shaft

Comparative Study on the Numerical Simulation of Bathymetric Changes under Storm Condition

2019 ◽  
Vol 91 (sp1) ◽  
pp. 106
Author(s):  
Minsang Cho ◽  
Hyun-Doug Yoon ◽  
Kidoek Do ◽  
Sangyoung Son ◽  
In-Ho Kim
Keyword(s):  
Numerical Simulation ◽  
Comparative Study ◽  
Storm Condition ◽  
Bathymetric Changes
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