Journal of Materials Research and Technology Journal of Materials Research and Technology
J Mater Res Technol 2017;6:77-89 DOI: 10.1016/j.jmrt.2016.11.002
Review Article
3D metal droplet printing development and advanced materials additive manufacturing
Lawrence E. Murra,b,c,, , Wayne L. Johnsonc
a Department of Metallurgical, Materials and Biomedical Engineering, The University of Texas at El Paso, El Paso, United States
b W.M. Keck Center for 3D Innovation, The University of Texas at El Paso, El Paso, United States
c Arizona Technology Innovation Group, Phoenix, United States
Received 14 October 2016, Accepted 16 November 2016
Abstract

While commercial additive manufacturing processes involving direct metal wire or powder deposition along with powder bed fusion technologies using laser and electron beam melting have proliferated over the past decade, inkjet printing using molten metal droplets for direct, 3D printing has been elusive. In this paper we review the more than three decades of development of metal droplet generation for precision additive manufacturing applications utilizing advanced, high-temperature metals and alloys. Issues concerning process optimization, including product structure and properties affected by oxidation are discussed and some comparisons of related additive manufactured microstructures are presented.

Keywords
Droplet deposition, Metal ink-jet printing, Metal additive manufacturing, Micro-droplet formation
Abbreviations
AM, CAD, DED, DMD, DMLS, EBF3, EBM, LENS, HIP, RP, SL, SLM
J Mater Res Technol 2017;6:77-89 DOI: 10.1016/j.jmrt.2016.11.002