Development of a new model describing the anisotropic dimensional change on sintering. (15th March 2022)

• Record Type: Journal Article
• Authors: Cristofolini, Ilaria; Molinari, Alberto; Zago, Marco; Uçak, Onur Utku; Vicenzi, Bruno; Dougan, Mark James; Schneider, Markus; Pedersen, Preben Hedegard; Bolitschek, Johanna; Voglhuber, Juergen
• Is Part Of: Powder metallurgy. Volume 65:Number 2(2022)
• Page Start: 89
• Page End: 100
• Publication Date: 2022-03-15
• Subjects: Dimensional change -- anisotropy; Powder metallurgy -- Periodicals; 671.3705
• DOI: 10.1080/00325899.2021.1956779
• Languages: English
• ISSNs: 0032-5899

Abstract

ABSTRACT : The anisotropic dimensional changes during sintering were investigated for rings made of eight different materials with different green densities and H /( Dext − Dint ) ratio. Dimensional changes are affected by green density, as shown in previous works, while the geometrical parameter does not display a clear influence. The anisotropy parameter K defined in a previous work does not describe anisotropy of dimensional change unambiguously, due to the anisotropy of shrinkage/swelling in the compaction plane. A new anisotropy parameter ( K 3 D ) was therefore defined considering the dimensional changes of internal diameter, external diameter and height. This parameter displays an unambiguous dependence on the equivalent isotropic dimensional change and will be used in further work to develop a predictive model for the prediction of the anisotropic dimensional change during sintering of parts with different green densities and geometry.