Modeling and characterization of microstructure evolution in single-crystal superalloys processed through scanning laser epitaxy

Amrita Basak, Ranadip Acharya, Suman Das

Research output: Contribution to conferencePaper

Abstract

This paper focuses on microstructure evolution in single-crystal alloys processed through scanning laser epitaxy (SLE); a metal powder-bed based additive manufacturing technology aimed at the creation of equiaxed, directionally-solidified or single-crystal structures in nickel-base superalloys. Galvanometer-controlled movements of the laser and high-resolution raster scanning result in improved control over the melting and solidification processes in SLE. Characterization of microstructural evolution as a function of the complex process physics in SLE is essential for process development, control and optimization. In this paper an ANSYS CFX based transient flow-thermal model has been developed to simulate microstructure characteristics for single-crystal superalloys such as CMSX-4 and René N5. Geometrical parameters and melt pool properties are used to estimate the resulting solidification microstructure. Microstructural predictions are compared to experimental metallography and reasonably good agreement is achieved.

Original languageEnglish (US)
Pages1237-1247
Number of pages11
StatePublished - Jan 1 2020
Event26th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2015 - Austin, United States
Duration: Aug 10 2015Aug 12 2015

Conference

Conference26th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2015
CountryUnited States
CityAustin
Period8/10/158/12/15

All Science Journal Classification (ASJC) codes

  • Surfaces, Coatings and Films
  • Surfaces and Interfaces

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    Basak, A., Acharya, R., & Das, S. (2020). Modeling and characterization of microstructure evolution in single-crystal superalloys processed through scanning laser epitaxy. 1237-1247. Paper presented at 26th Annual International Solid Freeform Fabrication Symposium - An Additive Manufacturing Conference, SFF 2015, Austin, United States.