Abstract
Experimental and numerical investigations of superplastic deformation are being carried out in order to understand the underlying mechanisms of deformation in low (conventional) and high strain-rate ranges. The experimental analysis consists of analyzing the microstructure using Backscattered Kikuchi Diffraction (BKD) method and relating it to the various mechanisms of superplastic deformation. The numerical investigation consists of developing a micromechanical model of superplastic deformation from the constituent grain level to the level of the polycrystalline aggregate. This model uses the self-consistent method to evaluate the grain to grain variation of stress during superplastic deformation. It is applied to statically recrystallized 7475 aluminum alloy and dynamically recrystallizing SUPRAL and the influence of temperature on the flow stress vs. strain rate behavior is successfully predicted.
| Original language | English (US) |
|---|---|
| Pages (from-to) | 47-52 |
| Number of pages | 6 |
| Journal | Materials Science Forum |
| Volume | 170-172 |
| DOIs | |
| State | Published - 1994 |
| Externally published | Yes |
| Event | Proceedings of the 1994 International Conference on Superplasticity in Advanced Materials (ICSAM-94) - Moscow, Russia Duration: May 24 1994 → May 26 1994 |
All Science Journal Classification (ASJC) codes
- General Materials Science
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering