Journal
ADDITIVE MANUFACTURING
Volume 5, Issue -, Pages 40-53Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.addma.2014.12.002
Keywords
Electron beam melting (EBM); Ti-alloy; Superalloys; Nb; Fe; Optical and electron microscopy characterization; Mechanical properties
Funding
- W. M. Keck Center for 3D Innovation
- Office of Research
- Mr. and Mrs. Macintosh Murchison Endowmentat the University of Texas at El Paso
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The metallurgy of selected metal and alloy components fabricated by additive metallurgy using electron beam melting (EBM) is presented for a range of examples including Ti-6Al-4V, Co-Cr-Mo super alloy, Ni-base super alloy systems (Inconel 625, 718 and Rene 142), Nb and Fe. Precursor and pre-alloyed powders are preheated and selectively melted using a range of EBM process parameters including beam scan strategies, beam current variations, and cooling rate features. Microstructures and residual mechanical properties are discussed for selected systems in contrast to more conventional wrought and cast products. Novel features of EBM fabrication include columnar microstructural architectures which result by layer-by-layer melt-solidification phenomena. (C) 2015 The Author. Published by Elsevier B.V.
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