Flow processes in superplastic yttria-stabilized zirconia: a Deformation Limit Diagram
Balasubramanian, N. and Langdon, Terence G. (2005) Flow processes in superplastic yttria-stabilized zirconia: a Deformation Limit Diagram. Materials Science and Engineering: A, 409, (1-2), 46-51. (doi:10.1016/j.msea.2005.06.071).
Download
Full text not available from this repository.
Description/Abstract
The possible rate-controlling mechanisms in the deformation of superplastic 3Y-TZP are considered. It is generally recognized that intragranular dislocations play only a limited role in the creep of this material at stresses below ~100 MPa when testing at temperatures in the range from 1573 to 1873 K. Therefore, a single rate-controlling mechanism is proposed which is consistent with experimental reports of a single activation energy. The proposed mechanism is based on Coble diffusion creep with a transition to interface-controlled diffusion creep at the lowest stress levels. It is shown that an equation derived on the basis of this mechanism provides a very good fit, to within an order of magnitude of the strain rate, for experimental data reported by different investigators. A Deformation Limit Diagram is introduced and constructed to provide a simple pictorial representation of the transitions occurring in the creep behavior at these low stresses.
| Item Type: | Article |
|---|---|
| Additional Information: | Micromechanics of Advanced Materials II - TMS 2005 Annual Meeting, in Honour of James C.M. Li's 80th Birthday |
| ISSNs: | 0921-5093 (print) |
| Related URLs: | |
| Keywords: | creep, deformation mechanisms, diffusion creep, superplasticity, yttria-stabilized zirconia |
| Subjects: | T Technology > T Technology (General) |
| Divisions: | University Structure - Pre August 2011 > School of Engineering Sciences |
| Item ID: | 23810 |
| Date Deposited: | 21 Mar 2006 |
| Last Modified: | 02 Mar 2012 11:26 |
| Contributors: | Balasubramanian, N. (Author) Langdon, Terence G. (Author) |
| Date: | 2005 |
| Additional Information: | Micromechanics of Advanced Materials II - TMS 2005 Annual Meeting, in Honour of James C.M. Li's 80th Birthday |
| Status: | Published |
| Contact Email Address: | nbalu23@eth.net |
| URI: | http://eprints.soton.ac.uk/id/eprint/23810 |
Actions (login required)
 |
View Item |
