| Autor: |
Michael F. Ashby, J.J. Wlassich, Roger B. Clough, Y. Geffen, R.J. Schaefer, Haydn N. G. Wadley, Arnold H. Kahn |
| Rok vydání: |
1991 |
| Předmět: |
|
| Zdroj: |
Acta Metallurgica et Materialia. 39:979-986 |
| ISSN: |
0956-7151 |
| DOI: |
10.1016/0956-7151(91)90298-f |
| Popis: |
A detailed experimental evaluation of mathematical models for densification during hot isostatic pressing (HIP) has been conducted using high purity copper powder as a model system. Using a new eddy current sensor, the density of cylindrical compacts has been measured in situ and compared with model predictions for the HIP process. Pressure shielding by the can has been found to influence the densification, and a simple plastic analysis of a thin-walled pressure vessel was used to account for its effects in the models. The existence of a low temperature creep mechanism during consolidation has been found and a formulation to account for its contribution to densification has been developed and implemented in the models. Other effects, believed to be associated with transient creep and the temperature dependence of power law creep parameters, have also been observed in the experiments and suggest the need for further model refinement. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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