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Instantaneous and residual stresses developed in hot isostatic pressing of metals and ceramics
Luleå tekniska universitet.
Luleå tekniska universitet.
1991 (English)In: Metallurgical Transactions. A, Physical Metallurgy and Materials Science, ISSN 0360-2133, Vol. 22, no 5, p. 1071-1078Article in journal (Refereed) Published
Abstract [en]

Under many conditions, hot isostatic pressing (HIP) of metallic or ceramic porous preforms occurs by the densification of a shell at the surface of the preform, which then thickens until the whole sample is fully densified. The development of such a dense shell reduces the effective pressure acting to densify the remaining porosity. Furthermore, this pressure difference can lead to anisotropic creep of the shell, and this may be a contributary cause of shape change of samples during HIP. The stresses occurring during cooling of the sample and the residual stresses are calculated as a function of all of the various material and pressing parameters. It is found that, in many cases, the cooling stresses which are tensile at the surface may well be large enough to cause cracking in ceramic samples

Place, publisher, year, edition, pages
1991. Vol. 22, no 5, p. 1071-1078
National Category
Other Materials Engineering
Research subject
Engineering Materials
Identifiers
URN: urn:nbn:se:ltu:diva-8407Local ID: 6ebb9d00-ec45-11dc-9508-000ea68e967bOAI: oai:DiVA.org:ltu-8407DiVA, id: diva2:981345
Note

Godkänd; 1991; 20080307 (cira)

Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-02-06Bibliographically approved

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