THE RATE CONTROLLING DEFORMATION MECHANISM IN HIGH-STRAIN RATE SUPERPLASTICITY

Authors
MISHRA RS MUKHERJEE AK
Citation
Rs. Mishra et Ak. Mukherjee, THE RATE CONTROLLING DEFORMATION MECHANISM IN HIGH-STRAIN RATE SUPERPLASTICITY, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 234, 1997, pp. 1023-1025
Citations number
11
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
234
Year of publication
1997
Pages
1023 - 1025
Database
ISI
SICI code
0921-5093(1997)234:<1023:TRCDMI>2.0.ZU;2-C
Abstract
An analysis of high strain rate superplasticity data shows a change in activation energy with particle size. The result is explained on the basis of change of rate controlling mechanism with second phase partic les. The prediction of diffusional relaxation models agrees well with the experimental results. The temperature for onset of high strain rat e superplasticity in mechanically alloyed aluminum and nickel base all oys can also be predicted by diffusional relaxation models. These conc epts can be used to construct a superplastic mechanism map. (C) 1997 E lsevier Science S.A.