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The current paper presents the results of a complex investigation of effect of Selective
Laser Melting process parameters on microstructure and properties of Inconel 718 bulk
specimens. The possibility of obtaining bulk specimens with tailored microstructure was studied.
The specimens with tailored microstructure were obtained and studied. It was shown that after
heat treatment and hot isostatic pressing the differences in microstructure and mechanical
properties of fine-grained and coarse-grained areas still remain in place. Finally, the feasibility of
applying the developed approach was shown by manufacturing a gas-turbine engine blade with
tailored microstructure in specific areas.
Keywords: additive manufacturing; selective laser melting; Inconel 718; EBSD; turbine blade, tailored microstructure. |
full paper (pdf, 2336 Kb)