Abstrakt
A combination of mutually complementary in-situ experimental techniques, including electron backscatter diffraction (EBSD), acoustic emission (AE), and digital image correlation (DIC) was employed to study the geometry and dynamics of the deformation twinning band formation. The investigated material, a rolled magnesium alloy AZ31 exhibiting a strong basal texture, was uniaxially compressed in the rolling direction i.e., in a manner favorable to a pronounced activity of the extension twinning.
The in-situ EBSD provided confirmation of the specific twin variant as well as an estimate of the twinned volume fraction evolution with progressing strain, whereas the DIC analysis coupled with the AE measurements revealed the macroscopic heterogeneities and provided insight into the dynamics of the twin band formation and propagation.