Keywords

Binder Jetting, stainless steel, Sintering, Porous Materials, Tailored Densi

Abstract

Binder jetting is an additive manufacturing process that produces relatively weak porous parts that are strengthened through sintering and/or infiltration. This paper reports on two different methods of preparing fine 316 stainless steel powder and their impact on the final sintered density and dimensions relative to direct printing into -22 micron powder. The first method uses agglomerates of fine powder. In the second, nylon 12 powders are mixed with the steel powder as a fugitive space holder to increase porosity. Sintered density and sintering shrinkage of agglomerate material are shown to vary with the density of the spread powder bed. However, with added nylon the shrinkage correlates with the shrinkage of the base steel powder while the density depends on the quantity of the nylon. Thus, it is possible to create varied sintered density with compatible shrinkage levels—a key step towards creating binder-jetting systems with spatially controlled porosity.

Original Publication Citation

M. Ziaee, E. M. Tridas, and N. B. Crane, “Binder-Jet Printing of Fine Stainless Steel Powder with Varied Final Density,” Journal of Materials, v 69, n 3, p 592-596, March 1, 2017, special edition of select papers from the 2016 Solid Freeform Fabrication Symposium.

Document Type

Peer-Reviewed Article

Publication Date

2017-03-01

Publisher

Journal of Materials

Language

English

College

Ira A. Fulton College of Engineering and Technology

Department

Mechanical Engineering

University Standing at Time of Publication

Full Professor

Share

COinS