Journal
SCRIPTA MATERIALIA
Volume 107, Issue -, Pages 34-37Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.scriptamat.2015.05.014
Keywords
Metastable beta titanium alloys; High strain rates; Stress-induced martensitic transformation; Mechanical twinning
Categories
Funding
- State Key Laboratory of Solidification Processing in NWPU [SKLSP201207]
- Queensland Centre for Advanced Material Processing and Manufacturing (AMPAM)
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The Ti-25Nb-3Zr-3Mo-2Sn (wt.%) alloy deforms primarily by {332)< 113 > twinning with limited {112}< 111 > twinning and stress-induced phase transformations. For the Ti-25Nb-3Zr-3Mo-2Sn alloy, the yield stress and strain hardening rate are independent of strain rate. It is found that adiabatic heating induced by high strain rate deformations is insufficient to significantly modify the deformation modes. Also the twinning rate and morphologies of {332)< 113 > twins are independent of strain rate (1 x 10(-3)-1 x 10(3)s(-1)) within the strain range in our experiments. (C) 2015 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
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