Numerical Simulation and Experimental Analysis of Laser Surface Remelting of AISI 420 Stainless Steel Samples

Noé Cheung; M.A. Larosa; Wislei R.R. Osório; Maria Clara F. Lerardi; Amauri Garcia

doi:10.4028/www.scientific.net/AMR.59.265

Paper Titles

Materials for the Very High Temperature Reactor-Results and Progress within the Fifth and Sixth Framework Programmes
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Atomistic Simulation of ½<111> Screw Dislocations in BCC Tungsten
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Ab-Initio Modelling of Point Defect-Impurity Interaction in Tungsten and other BCC Transition Metals
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Characterization of MeV Ion-Irradiated SiC_f/SiC Composites Prepared with Different Methods
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Numerical Simulation and Experimental Analysis of Laser Surface Remelting of AISI 420 Stainless Steel Samples
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Microcharacterization of Damage in Materials for Advanced Nuclear Fission Plants
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Preparation of Polymer-Nanodiamond Composites with Improved Properties
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Microstructure and Properties of SiC Nanowire-Reinforced SiC_f/SiC Composites
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Multi-Axial Thermo-Mechanical Fatigue of a Near-Gamma TiAl-Alloy
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Numerical Simulation and Experimental Analysis of Laser Surface Remelting of AISI 420 Stainless Steel Samples

Abstract:

The aim of this work is to develop a heat transfer mathematical model based on the finite difference method in order to simulate temperature fields in the laser surface remelting process. Convective heat transfer in the remelted pool is taken into account by using the effective thermal conductivity approach. Experiments of laser surface remelting of AISI 420 stainless steel samples were carried out in the present investigation, and numerical simulations were applied for the laser machine operating parameters. The work also encompasses the analysis of microstructural and microhardness variations throughout the resulting treated and unmolten zones.