ON THE STRAIN-RATE SENSITIVITY VALUES OF SUPERPLASTIC MATERIALS

Authors
VASIN RA ENIKEEV FU MAZURSKI MI
Citation
Ra. Vasin et al., ON THE STRAIN-RATE SENSITIVITY VALUES OF SUPERPLASTIC MATERIALS, Materials science & engineering. A, Structural materials: properties, microstructure and processing, 255(1-2), 1998, pp. 169-171
Citations number
11
Categorie Soggetti
Material Science
Journal title
Materials science & engineering. A, Structural materials: properties, microstructure and processing → ACNP
ISSN journal
09215093
Volume
255
Issue
1-2
Year of publication
1998
Pages
169 - 171
Database
ISI
SICI code
0921-5093(1998)255:1-2<169:OTSSVO>2.0.ZU;2-C
Abstract
Some problems arising in experimental determination of the strain fate sensitivity of the flow stress, sigma, on the strain rate, xi, are co nsidered. It is pointed out that the strain rate sensitivity index, m, entering the standard power relation sigma = K xi(m), is not identica l to the slope M = partial derivative (log sigma)/partial derivative ( log xi) of the sigmoidal superplastic curve. The difference between m and M is to be taken into consideration in treating the results of the mechanical tests. Published by Elsevier Science S.A.