Twinning system selection in a metastable β-titanium alloy by Schmid factor analysis

• Published in: Scripta materialia Vol. 64; no. 12; pp. 1110 - 1113
• Main Authors: Bertrand, E., Castany, P., Péron, I., Gloriant, T.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01-06-2011; Elsevier
• Subjects: Activated; Alloy systems; Backscattering; Beta; Chemical engineering; Chemical Sciences; Diffraction; Electron backscattering diffraction; Factor analysis; Melting; Schmid factor; Titanium alloy; Titanium base alloys; Twinning; Titanium alloy; Schmid factor; Electron backscattering diffraction; Twinning
• ISSN: 1359-6462; 1872-8456
• DOI: 10.1016/j.scriptamat.2011.02.033

► A metastable beta Ti-25Ta-24Nb alloy was synthesized by cold crucible semi-leviation melting. ► Electron backscattering diffraction was used to characterize the deformation mechanisms. 2 twinning systems have been identified. ► The Schmid factor was used to determine the activated variant.
Electron backscattering diffraction and Schmid factor analysis were used to study the twinning variant selection in a Ti–25Ta–24Nb (mass%) metastable β-titanium alloy. The two twinning systems {1
1
2}〈1
1
1〉 and {3
3
2}〈1
1
3〉 were observed. For each system the Schmid factor was shown to be a relevant parameter to determine the activated variant. Moreover, selection between the two twinning systems depends on the crystallographic orientation of the grain with respect to the tensile direction.