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Characterization of Nickel Based Superalloys Processed Through Direct Metal Laser Sintering Technique of Additive Manufacturing

Published

Author(s)

Yaakov S. Idell, Carelyn E. Campbell, Lyle E. Levine, Eric Lass, Li Ma, Sudha Cheruvathur

Abstract

Additive manufacturing of nickel based superalloys will allow direct production of complex shaped components based on 3-D computer aided drawings. The aerospace industry is interested in exploiting this technology to reduce time and cost for production of complex parts; however, the effects resulting from repeated cycles of rapid heating, melting, cooling, and solidification on the microstructure-property relationships are not well understood. We conducted a study investigating the microstructual evolution processes that occur during direct metal laser sintering of various Ni-based superalloys. Microstructural characterization techniques including scanning and transmission electron microscopy, electron back scattering diffraction, x-ray diffraction, and synchrotron ultra small angle x-ray scattering were used to determine the residual stress distributions, porosity, phase fractions, and compositional differences as functions of varying processing conditions. These results are compared with multicomponent diffusion simulations and FEM simulations that predict the phase fraction, composition, and residual stress as functions of time and temperature

Keywords

Additive Manufacturing, SEM, TEM, XRD

Citation

Idell, Y. , Campbell, C. , Levine, L. , Lass, E. , Ma, L. and Cheruvathur, S. (2015), Characterization of Nickel Based Superalloys Processed Through Direct Metal Laser Sintering Technique of Additive Manufacturing (Accessed April 12, 2024)
Created June 29, 2015, Updated March 24, 2017