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Anisotropy of Dimensional Variation and its Effect on Precision of Sintered Parts

  • : Molinari, A1
  • : 1University of Trento
  • : PDF Download
  • : 2012

Abstract

Anisotropy of dimensional change on sintering is a well recognized phenomenon in powder metallurgy. In the present work, anisotropy has been investigated by dilatometry experiments on specimens cut from real parts, parallel and perpendicular to the compaction direction, to study the sintering phenomena responsible for the different dimensional change along the two directions. Anisotropy of dimensional change was also analysed by comparing axial and radial dimensions of green and sintered parts. The effect on dimensional precision has been estimated by means of a simplified model, which includes both isotropic and anisotropic behaviour in ring shaped parts with different height and wall thickness.
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