On the Possible Mechanisms of Porosity Formation during Laser Melt Injection (LMI) Technology

Gábor Buza; Viktória Janó; Mária Svéda; Olga Verezub; Zoltán Kálazi; György Kaptay; András Roósz

doi:10.4028/www.scientific.net/MSF.589.79

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HomeMaterials Science ForumMaterials Science Forum Vol. 589On the Possible Mechanisms of Porosity Formation...

On the Possible Mechanisms of Porosity Formation during Laser Melt Injection (LMI) Technology

Abstract:

In the present study the analysis of 5 different mechanisms of porosity formation during laser melt injection (LMI) technology were performed. Experiments were supported by thermodynamic and fluid-flow analysis. Special attention should be paid to i. clean the surface of the substrate, ii. use inert shielding gas, iii. use proper particle size and gas velocity, iv. use proper laser power and laser beam velocity to control bath temperature and v. deoxidize the surface of the added particles.