Sintering anisotropy of binder jetted 316L stainless steel: part I–sintering anisotropy
Journal article, 2022

In Binder Jetting (BJ) Additive Manufacturing (AM), green components are usually subjected to sintering process to reach required properties. Owing to the inherent low green density, binder jetted (BJ) parts undergo shrinkages up to 20%. In addition, anisotropic dimensional evolution during sintering is characteristic for BJ, generally caused by the specifics of the arrangement of particles during the printing process. In this study, the multi-axial dimensional evolution of 316L stainless steel cubic samples (10 × 10 × 10 mm3), manufactured using BJ, was characterised by dilatometry experiments. Dilatometry tests were conducted up to sintering temperatures of 1300°C and 1370°C, with a heating rate of 10°C/min and 5°C/min, respectively. Dilatometry results and final dimension measurements showed anisotropic shrinkage behaviour during sintering with about 15% larger shrinkage along the building direction. Shrinkages along the other two orthogonal directions were relatively similar, but a slightly larger final shrinkage along the printhead movement direction was observed. Relative density of 85.0% and 96.4% was obtained after sintering tests at 1300°C and 1370°C, respectively.

additive manufacturing

stainless steel

sintering

shrinkages

binder jetting

Anisotropy

dilatometry

Author

Alberto Cabo Rios

Chalmers, Industrial and Materials Science, Materials and manufacture

Eduard Hryha

Chalmers, Industrial and Materials Science, Materials and manufacture

Eugene Olevsky

University of California at San Diego (UCSD)

San Diego State University

P. Harlin

Sandvik

Powder Metallurgy

0032-5899 (ISSN) 1743-2901 (eISSN)

Vol. 65 4 273-282

Subject Categories

Ceramics

Other Materials Engineering

Metallurgy and Metallic Materials

DOI

10.1080/00325899.2021.2020485

More information

Latest update

10/17/2022