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An integrated hybrid methodology for estimation of absorptivity and interface temperature in laser transmission welding

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Abstract

This study reports a new hybrid integrated technique to predict the absorptivity of absorber and the interface temperature of the joint in laser transmission welding. The new approach is more robust as the numerical model is confirmed through experimental observations initially with weld width and further with surface temperature. Experiments are performed on polycarbonate sheets with electrolytic iron powder (EIP) as an absorber. The surface temperature and weld width are measured from the experiments. A transient 3-D finite element-based numerical model is developed for heat transfer analysis. The variation of heat flux with stand-off distance is also considered to enhance the accuracy of the computed results. The absorptivity is tuned in the numerical model by inverse analysis so that the numerical weld width is in close conjunction with the experimental weld width. After inverse estimation, the numerical model is validated with the experimental results of surface temperature using infrared thermography. The results indicate that the upper surface temperatures at the center in the numerical model are found to be in good agreement with experimental observations, and the average error is obtained to be less than 6%. Then, the interface temperatures are estimated after the validation of the numerical model.

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Availability of data and material

The authors confirm that the data and material supporting the findings of this study are available within the article. Raw data are available from the corresponding author upon reasonable request.

Code availability

DFLUX subroutine is written in Fortran to incorporate the moving heat flux. The subroutine code can be provided by the corresponding author upon reasonable request.

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Acknowledgements

The laser system used for this study was established through grant received from the Department of Science and Technology (DST), India, under project number DST/TDT/AMT/2017/026.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Indian Institute of Technology Ropar, Rupnagar, Punjab, 140001, India

    Dhruva Kumar Goyal, Ramsingh Yadav & Ravi Kant

Authors
  1. Dhruva Kumar Goyal
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  2. Ramsingh Yadav
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  3. Ravi Kant
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Contributions

Dhruva Kumar Goyal has proposed the methodology and performed the numerical simulations and experiments, including data analysis, and drafted the original manuscript. Ramsingh Yadav coordinated and helped in the development of experimental setup, conducting the experiments, and editing the original manuscript. Ravi Kant has supervised the overall project from conceptualization to methodology. He has reviewed and edited the primary manuscript. He also led the project and overall collaborative effort of all entities.

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Correspondence to Ravi Kant.

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Goyal, D.K., Yadav, R. & Kant, R. An integrated hybrid methodology for estimation of absorptivity and interface temperature in laser transmission welding. Int J Adv Manuf Technol 121, 3771–3786 (2022). https://doi.org/10.1007/s00170-022-09536-y

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  • DOI: https://doi.org/10.1007/s00170-022-09536-y

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