Dependence of twinning on matrix orientation in tensile deformed commercial purity titanium

Abstract

In this work, twinning systems of tensile deformed commercial purity titanium were studied using the electron backscatter diffraction technique and Schmid factor analysis. The dependence of twinning on the matrix orientation was determined by the distribution map of the Schmid factor. The results showed that both compressive twins and tensile twins are dependent on the matrix orientation. Twins were activated in the grains with large values of twinning Schmid factor. The critical shear stress and Schmid factor of a grain determined the activation of a particular twinning system.

Keywords:

• EBSD
• Twinning
• Schmid factor
• Orientation
• Dependence

The authors gratefully thank the financial support by National Key Technology Support Program during the Eleventh Five-Year Plan Period with project no. 2008BAE62B02.