Effect of Shell Dimensions on Compaction and Shape Change during SHS-Pressing

The finite-element method is used to study the effect of sand shell size on compaction and shape change during compaction of billets formed from the hot products of self-propagating high-temperature synthesis. The extreme nature of the change in billet density in relation to shell thickness that gov...

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Bibliographic Details
Published in:Powder metallurgy and metal ceramics 2004-05, Vol.43 (5-6), p.229-235
Main Authors: Amosov, Alexander P, Radchenko, Vladimir P, Fedotov, Alexander F
Format: Article
Language:English
Subjects:
Billets
Compressibility
Density
Distortion
Reserves
Sand
Self-propagating synthesis
Shells
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Summary:The finite-element method is used to study the effect of sand shell size on compaction and shape change during compaction of billets formed from the hot products of self-propagating high-temperature synthesis. The extreme nature of the change in billet density in relation to shell thickness that governs its reserve of compressibility is established. In order to make high-density billets it is necessary that shell compressibility reserve is higher than that of the synthesis products. With decrease in shell radial dimensions there is distortion of billet shape due to a nonuniform stress-strained state close to the side surface of the tool with external friction.[PUBLICATION ABSTRACT]
ISSN:1068-1302
1573-9066
DOI:10.1023/B:PMMC.0000042455.62526.69