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Role of the α/β Interface in the Plastic Anisotropy of Single Colony Crystals in Titanium Alloys

Published online by Cambridge University Press:  15 March 2011

M. F. Savage ,
J. Tatalovich  and
M. J. Mills
M. F. Savage
Affiliation:
Materials and Process Engineering, Pratt and Whitney, East Hartford, CT 06108
J. Tatalovich
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
M. J. Mills
Affiliation:
Department of Materials Science and Engineering, The Ohio State University, Columbus, OH 43210
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Abstract

The anisotropy in room temperature plastic deformation has been investigated in single α(HCP)/β(BCC) colonies of a commercial α/β titanium alloy (Ti-6Al-2Sn-4Zr-2Mo-0.1Si) oriented for activation of individual basal slip systems. Detailed transmission electron microscopy (TEM) studies of the slip transmission mechanisms through the α/β interfaces have been performed to elucidate the role of these interfaces in determining yield and strain hardening behavior. Significant anisotropy in the yield strengths and hardening rates for the 3 unique basal slip systems is measured, and is attributed to the different slip transmission mechanisms active due to the near-Burgers orientation relationship existing between α- and β-phases. These results are should be transferable to other alloy systems exhibiting this orientation relationship.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 819: Symposia N/P – Interfacial Engineering for Optimized Properties III , 2004 , N1.6
Copyright
Copyright © Materials Research Society 2004

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