Metal Fabrication by Additive Manufacturing Using Laser and Electron Beam Melting Technologies
来源期刊：JOURNAL OF MATERIALS SCIENCE TECHNOLOG2012年第1期
论文作者：Lawrence E. Murr Sara M. Gaytan Diana A. Ramirez Edwin Martinez Jennifer Hernandez Krista N. Amato Patrick W. Shindo Francisco R. Medina Ryan B. Wicker
文章页码：1 - 14
摘 要：Selective laser melting （SLM） and electron beam melting （EBM） are relatively new rapid, additive manufac- turing technologies which can allow for the fabrication of complex, multi-functional metal or alloy monoliths by CAD-directed, selective melting of precursor powder beds. By altering the beam parameters and scan strategies, new and unusual, even non-equilibrium microstructures can be produced; including controlled microstructural architectures which ideally extend the contemporary materials science and engineering paradigm relating structure-properties-processing-performance. In this study, comparative examples for SLM and EBM fabricated components from pre-alloyed, atomized precursor powders are presented. These include Cu, Ti–6Al–4V, alloy 625 （a Ni-base superalloy）, a Co-base superalloy, and 17-4 PH stainless steel. These systems are characterized by optical metallography, scanning and transmission electron microscopy, and X-ray diffraction.
Lawrence E. Murr1,2，Sara M. Gaytan1,2，Diana A. Ramirez1,2，Edwin Martinez1,2，Jennifer Hernandez1,2，Krista N. Amato1,2，Patrick W. Shindo1,2，Francisco R. Medina1,2，Ryan B. Wicker1,2
1. Department of Metallurgical and Materials Engineering, The University of Texas at El Paso,El Paso, TX 79968, USA2. W.M. Keck Center for 3D Innovation, The University of Texas at El Paso,El Paso, TX 79968, USA
摘 要：Selective laser melting （SLM） and electron beam melting （EBM） are relatively new rapid, additive manufac- turing technologies which can allow for the fabrication of complex, multi-functional metal or alloy monoliths by CAD-directed, selective melting of precursor powder beds. By altering the beam parameters and scan strategies, new and unusual, even non-equilibrium microstructures can be produced; including controlled microstructural architectures which ideally extend the contemporary materials science and engineering paradigm relating structure-properties-processing-performance. In this study, comparative examples for SLM and EBM fabricated components from pre-alloyed, atomized precursor powders are presented. These include Cu, Ti–6Al–4V, alloy 625 （a Ni-base superalloy）, a Co-base superalloy, and 17-4 PH stainless steel. These systems are characterized by optical metallography, scanning and transmission electron microscopy, and X-ray diffraction.
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