Single-Track Melt-Pool Measurements and Microstructures in Inconel 625

Abstract

We use single track laser melting experiments and simulations on Inconel 625 to estimate the dimensions and microstructures of the resulting melt pools. Our work is based on a design-of-experiments approach which uses multiple laser power and scan speed combinations. Single track experiments generate melt pools of certain dimensions. These dimensions reasonably agree with our finite element calculations. Phase-field simulations predict the size and segregation of the cellular microstructures that form along the melt pool boundaries for the solidification conditions that change as a function of melt pool dimensions.

arXiv commentAccepted for publication in JOM on February 2, 2018

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• Laser powder-bed fusion additive manufacturing: physics of complex melt flow and formation mechanisms of pores, spatter and denudation zones
• Quantitative Phase Field Model of Alloy Solidification
• Application of Finite Element, Phase-field, and CALPHAD-based Methods to Additive Manufacturing of Ni-based Superalloys
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Cited by in corpus (4)

• Accurate prediction of melt pool shapes in laser powder bed fusion by the non-linear temperature equation including phase changes - isotropic versus anisotropic conductivity
• Uncertainty Analysis of Microsegregation during Laser Powder Bed Fusion
• Simulation of temperature, stress and microstructure fields during laser deposition of Ti-6Al-4V
• Effects of isotherm patterns on cellular interface morphologies of melt pool origin