Crystallographic texture engineering through novel melt strategies via electron beam melting: Inconel 718

Dehoff, Ryan R.; Kirka, Michael M.; List, III, Frederick Alyious; Unocic, Kinga A.; Sames, William J.

doi:10.1179/1743284714Y.0000000697

Crystallographic texture engineering through novel melt strategies via electron beam melting: Inconel 718

Journal Article · Mon Jun 01 04:00:00 EDT 2015 · Materials Science and Technology

DOI:https://doi.org/10.1179/1743284714Y.0000000697· OSTI ID:1235841

Dehoff, Ryan R. ^[1]; Kirka, Michael M. ^[1]; List, III, Frederick Alyious ^[1]; Unocic, Kinga A. ^[1]; Sames, William J. ^[2]

Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States); Texas A & M Univ., College Station, TX (United States)

Preliminary research has demonstrated the ability to utilise novel scan strategies in the electron beam melting (EBM) process to establish control of crystallographic texture within Inconel 718 deposits. Conventional EBM scan strategies and process parameters yield coarse columnar grains aligned parallel to the build direction. Through varying process parameters such as beam power, beam velocity, beam focus and scan strategy, the behaviour of the electron beam can be manipulated from a line source to a point source. The net effect of these variations is that the resulting crystallographic texture is controlled in a manner to produce either epitaxial deposits or fully equiaxed deposits. Furthermore, this research demonstrates the ability to change the crystallographic texture on the macroscale indicating that EBM technology can be used to create complex geometric components with both site-specific microstructures and material properties.

Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Manufacturing Demonstration Facility (MDF)

Sponsoring Organization:: USDOE Office of Energy Efficiency and Renewable Energy (EERE)

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 1235841

Journal Information:: Materials Science and Technology, Journal Name: Materials Science and Technology Journal Issue: 8 Vol. 31; ISSN 0267-0836

Publisher:: Taylor & FrancisCopyright Statement

Country of Publication:: United States

Language:: English

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