Abstract
The local stress at the interface is analyzed to find out the role of the liquid phase in the superplasticity for metal matrix composites. When the local stress caused by sliding along the interface is higher than that applied on to the interface, the maximum superplastic deformability is obtained in the material containing a liquid phase. On the contrary, the deformability is maximum in a fully solid state. Therefore, it is suggested that when the stress concentration is caused, a liquid phase is needed in order to relax the stress concentration. However, when no stress concentrations are caused, a liquid phase is not needed for the superplasticity. This theory is in good agreement with the experiment results.
| Original language | English |
|---|---|
| Pages (from-to) | 225-228 |
| Number of pages | 4 |
| Journal | Cailiao Kexue yu Gongyi/Material Science and Technology |
| Volume | 9 |
| Issue number | 3 |
| State | Published - Sep 2002 |
| Externally published | Yes |
Keywords
- Coordination mechanism
- Liquid phase
- Metal matrix composites
- Superplasticity
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