Shape Development of Powder Bodies Modelled as a Result of the Densification Process in Hot Isostatic Pressing
1988 (English)In: Proceedings of the 1988 International Powder Metallurgy Conference: International powder metallurgy conference : Papers / [ed] P. Ulf Gummeson; Donald A. Gustafson, Princeton, NJ: Metal powder industries federation , 1988, 23-36 p.Conference paper (Refereed)
The densification of a powder body in a HIP process is non-uniform because of an existing temperature gradient in the powder body. This gradient gives rise to a densification front, which moves from the surface inwards. This front will, in reality, be more or less diffuse, but may be considered as extremely sharp for the purpose of modelling the shape and dimensional changes of idealized powder bodies. The geometrical considerations presented show that extreme shape change can occur in a practical HIP cycle. As an example, a cubic powder body will get a star-like shape, in which the edge angles will depend solely on the densification ratio. Considered are the effects caused by uniform and non-uniform heating in the densification of various powder bodies defined by flat and/or curved body surfaces, and the results may serve as a base for an improved understanding of the effects of non-uniform densification and its importance for the powder body design.
Place, publisher, year, edition, pages
Princeton, NJ: Metal powder industries federation , 1988. 23-36 p.
Progress in powder metallurgy, ISSN 0079-6719 ; 44
Research subject Engineering Materials
IdentifiersURN: urn:nbn:se:ltu:diva-39029Local ID: d9be3210-8808-11de-8da0-000ea68e967bISBN: 918404770OAI: oai:DiVA.org:ltu-39029DiVA: diva2:1012537
International Powder Metallurgy Conference : 05/06/1988 - 10/06/1988
Godkänd; 1988; 20090813 (andbra)2016-10-032016-10-03Bibliographically approved