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    Volume 8, Issue 6 (November 2019)

    Special Issue Paper

    Adaptive Process Control for Uniform Laser Hardening of Complex Geometries Using Iterative Numerical Simulation

    (Received 18 June 2018; accepted 6 December 2018)

    Published Online: 01 November 2019

    CODEN: MPCACD

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    Abstract

    Laser surface hardening, when applied to complex geometries, poses a challenge in the terms of obtaining uniform hardness throughout the hardened area because of variable heat sink effects. In this work, an iterative numerical approach was used to estimate the required modulation in laser power to achieve a uniform surface temperature throughout the process zone. Firstly, a transient thermal model for the laser–material interaction was developed using the finite element method for a rectangular spot of 8 × 5 mm. The temperature-dependent material properties were used to bring in nonlinear effects in the analysis so as to predict the hardened zone dimensions more precisely. The numerical model was validated by carrying out laser hardening experiments using a 6-kW diode laser. The validated numerical model was used with an iterative technique aided by conditional looping to achieve a uniform surface temperature during the laser hardening of the complex geometry with a variable heat sink. The developed iterative approach can be effectively used on any geometry with a variable heat sink to obtain a constant surface temperature throughout the process zone.

    Author Information:

    Barath, V. R.
    International Advanced Research Center for Powder Metallurgy and New Materials (ARCI), Hyderabad, Telangana

    Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Coimbatore, Tamil Nadu

    Tak, Manish
    Center for Laser Processing of Materials, International Advanced Research Center for Powder Metallurgy and New Materials (ARCI), Hyderabad, Telangana

    Padmanaban, R.
    Department of Mechanical Engineering, Amrita School of Engineering, Amrita Vishwa Vidyapeetham University, Coimbatore, Tamil Nadu

    Padmanabham, G.
    International Advanced Research Center for Powder Metallurgy and New Materials (ARCI), Hyderabad, Telangana


    Stock #: MPC20180095

    ISSN:2379-1365

    DOI: 10.1520/MPC20180095

    Author
    Title Adaptive Process Control for Uniform Laser Hardening of Complex Geometries Using Iterative Numerical Simulation
    Symposium ,
    Committee A01