Fabrication of Metal and Alloy Components by Additive Manufacturing: Examples of 3D Materials Science

Lawrence E. Murr, Edwin Martinez, Krista N. Amato, Sara M. Gaytan, Jennifer Hernandez, Diana A. Ramirez, Patrick W. Shindo, Frank Medina, Ryan B. Wicker
2012 Journal of Materials Research and Technology  
Objective: This paper provides a brief review of relatively new additive manufacturing technologies for the fabrication of unusual and complex metal and alloy products by laser and electron beam melting. A number of process features and product microstructures are illustrated utilizing 3D optical and transmission electron microscope image compositions representing examples of 3D materials science. Methods: Processing methods involving electron beam melting (EBM) and a process referred to as
more » ... ct metal laser sintering Este é um artigo Open Access sob a licença de CC BY-NC-ND Fig. 1 Arcam A2 EBM System. Arrow at top right indicates the electron beam melting/processing system. Control unit is at left (DMLS), often called selective laser melting (SLM) are described along with the use of light (optical) microscopy (OM), transmission electron microscopy (TEM), and X-ray diffraction (XRD) to elucidate microstructural phenomena. Results: Examples of EBM and SLM studies are presented in 3D image compositions. These include EBM of Ti-6Al-4V, Cu, Co-base superalloy and Inconel 625; and SLM of 17-4 PH stainless steel, Inconel 718 and Inconel 625. Conclusions: 3D image compositions constituting 3D materials science provide effective visualization for directional solidi cation-related phenomena associated with the EBM and SLM fabrication of a range of metals and alloys, especially microstructures and microstructural architectures. KEY WORDS: Laser and electron beam melting; 3D image compositions; Optical and electron microscopy; Metal and alloy fabrication; Microstructures
doi:10.1016/s2238-7854(12)70009-1 fatcat:r5wvbyd2u5gmlhrzjqrhbn5xqy