Pan, W. and Krohn, K. and Leen, S.B. and Hyde, T.H. and Walloe, S. (2005) A sigmoidal model for superplastic deformation. Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, 219 (3). pp. 149-162. ISSN 1464-4207
Full text not available in this repository. (Request a copy from the Strathclyde author)Abstract
A new phenomenological model, designed to capture the sigmoidal nature of stress dependency on strain rate for superplastic deformation, is presented. The model is developed for the Ti-6Al-2Sn-4Zr-2Mo alloy using data obtained under controlled strain-rate tensile tests spanning a range of strain rates and temperatures, from 930 to 980 °C. The sigmoidal model performance is compared with that of a more conventional double-power law, strain, and strain-rate hardening model using time-dependent finite element and theoretical analyses. The primary intended application of the sigmoidal model is for more accurate simulation of the effects of strain-rate variation within test specimens and sheet during superplastic deformation. Analysis of this variation within two designs of tensile test specimens is presented to illustrate this aspect.
| Item type: | Article |
|---|---|
| ID code: | 9462 |
| Keywords: | superplastic deformation, sigmoidal model, materials design, Mechanical engineering and machinery |
| Subjects: | Technology > Mechanical engineering and machinery |
| Department: | Faculty of Engineering > Mechanical and Aerospace Engineering |
| Related URLs: | |
| Depositing user: | Strathprints Administrator |
| Date Deposited: | 20 Jul 2011 12:16 |
| Last modified: | 12 Mar 2012 10:51 |
| URI: | http://strathprints.strath.ac.uk/id/eprint/9462 |
Actions (login required)
| View Item |