Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1635852 | Transactions of Nonferrous Metals Society of China | 2015 | 13 Pages |
Abstract
The effects of temperature and strain rate on the flow stress behavior of twin-roll cast, rolled and heat-treated AZ31 magnesium alloys were investigated under uniaxial tension. At high temperatures, dynamic recovery, continuous dynamic recrystallization, grain boundary sliding and the activation of additional slip systems lead to an improvement of the ductility of the alloys. The elongation to failure is nearly independent of the strain rate between 473 and 523 K at 10â2 sâ1 and 10â1 sâ1, which is related to the strain rate dependence of the critical resolved shear stress (CRSS) for nonbasal slip. Despite the high temperature, twins are even observed at 573 K and 10â3 sâ1 because they have a low CRSS.
Keywords
Related Topics
Physical Sciences and Engineering
Materials Science
Metals and Alloys
Authors
F. BERGE, L. KRÃGER, H. OUAZIZ, C. ULLRICH,