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Time-dependent FEM simulation of dilution control of laser cladding by adaptive mesh method

  • Materials & Fracture · Solids & Structures · Dynamics & Control · Production & Design
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Abstract

Dilution is an important factor which influences the properties of clad layer. In this paper the change of dilution during laser cladding and the control of dilution are simulated by a finite element method. The adaptive mesh method is adopted for the time-dependent finite element method computation so that the shape of melt pool can be well represented. The situation of the width control of melt pool is also simulated, which indicates that the dilution can be controlled if the width of melt pool is controlled. Computational results indicate that if a line energy (input energy per unit distance) remains constant the dilution will increase with time, especially at the beginning. Simulation results show that it is possible to control dilution in a certain range if the line energy decreases with time. Experiment of Nd: YAG laser cladding with wire feeding is performed. Experiment results coincide well with the FEM results.

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Abbreviations

k:

Thermal conductivity

ϱ:

Mass density

c:

Specific heat

h:

Convective heat transfer coefficient

T:

Temperature

Tm :

Melting point

To :

Ambient temperature

P:

Laser power

v:

Cladding speed

f:

Absorbed power density

:

Heat capacity matrix

:

Conductivity matrix

:

Nodal force vector

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Authors and Affiliations

  1. Department of Mechanical Engineering, Inha University, 253 Younghyun-dong, Nam-Ku, 402-751, Inchon, Korea

    Jae-Do Kim & Yun Peng

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  1. Jae-Do Kim
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  2. Yun Peng
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Correspondence to Jae-Do Kim.

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Kim, JD., Peng, Y. Time-dependent FEM simulation of dilution control of laser cladding by adaptive mesh method. KSME International Journal 14, 177–187 (2000). https://doi.org/10.1007/BF03184784

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  • DOI: https://doi.org/10.1007/BF03184784

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