Microstructure evolution of laser cladding Inconel 718 assisted hybrid ultrasonic-electromagnetic field

In the present article, the hybrid ultrasonic-electromagnetic (UEM) physics field is introduced into the laser additive manufacturing Inconel 718. The effect of the hybrid UEM field on microstructure evolution is investigated. Obtained results show that when the hybrid UEM is applied, porosity reduces significantly, the columnar dendrites epitaxial growth behavior along the deposition direction depresses and the columnar transition to equiaxed grains improves. Moreover, the average microhardness of the coating increases from 244 HV0.2 to 271 HV0.2. (C) 2021 Elsevier B.V. All rights reserved.

Automated summary

The study demonstrates that the application of hybrid ultrasonic-electromagnetic field in laser additive manufacturing of Inconel 718 can significantly reduce porosity, improve grain structure, and increase the microhardness of the coating.