Prediction of solidification cracking by an empirical-statistical analysis for laser cladding of Inconel 718 powder on a non-weldable substrate

摘要: Abstract This paper presents an empirical-statistical approach to predict solidification cracking during laser cladding of Inconel 718 powder on A-286 Fe-based superalloy. is based a linear regression analysis and correlations between the key processing parameters (laser power, P; feed rate, F; scanning speed, V) geometrical attributes single tracks. These were used for development map which assesses effects characteristics required conditions obtain crack-free clads. Scanning electron microscopy was microstructural characterization. Thermodynamic calculations using non-equilibrium Scheil model also employed. The showed that directly associated with height angle tracks are P 2 F V 0.5 1 , respectively. revealed dilution ratio governing macrostructural attribute avoid cracking. Indeed, substrate lower than 25% shifts composition alloy regime, has susceptibility role this feature in reducing fusion zone thoroughly discussed.