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Materials 2018, 11(1), 76; https://doi.org/10.3390/ma11010076

Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys

State Key Laboratory of Explosion Science and Technology, Beijing Institute of Technology, Beijing 100081, China
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Received: 3 December 2017 / Revised: 2 January 2018 / Accepted: 3 January 2018 / Published: 5 January 2018
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Abstract

To study the dynamic shear deformation and failure properties of Ti-6Al-4V (Ti-64) alloy and Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy, a series of forced shear tests on flat hat shaped (FHS) specimens for the two investigated materials was performed using a split Hopkinson pressure bar setup. The evolution of shear deformation was monitored by an ultra-high-speed camera (Kirana-05M). Localized shear band is induced in the two investigated materials under forced shear tests. Our results indicate that severe strain localization (adiabatic shear) is accompanied by a loss in the load carrying capacity, i.e., by a sudden drop in loading. Three distinct stages can be identified using a digital image correlation technique for accurate shear strain measurement. The microstructural analysis reveals that the dynamic failure mechanisms for Ti-64 and Ti-55511 alloys within the shear band are of a cohesive and adhesive nature, respectively. View Full-Text
Keywords: titanium alloys; split Hopkinson pressure bar; flat hat shaped specimen; digital image correlation technique; shear band titanium alloys; split Hopkinson pressure bar; flat hat shaped specimen; digital image correlation technique; shear band
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Ran, C.; Chen, P. Dynamic Shear Deformation and Failure of Ti-6Al-4V and Ti-5Al-5Mo-5V-1Cr-1Fe Alloys. Materials 2018, 11, 76.

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