Effect of High Strain Rate on Adiabatic Shear Sensitivity and Microstructures in Pure Titanium

Tong Bo Wang; Bo Long Li; Mian Li; Zuo-Ren Nie

doi:10.4028/www.scientific.net/AMR.915-916.567

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 915-916Effect of High Strain Rate on Adiabatic Shear...

Effect of High Strain Rate on Adiabatic Shear Sensitivity and Microstructures in Pure Titanium

Abstract:

As a model material, commercial pure titanium was rolled to plates with different dislocation boundaries. The dynamic mechanical response of Ti specimen was analyzed during impacted with Split Hopkinson Pressure Bar (SHPB) at different strain rates, and microstructure evolution was investigated using optical microscopy and transmission electron microscopy. It was found that adiabatic shear sensitivity was decreased with increasing strain rates for all as-annealed, 25% and 50% cold rolled states. To the contrary, for 70% cold rolled state the adiabatic shear sensitivity was increased with increasing strain rates. The microstructure of adiabatic shear bands (ASBs) were developed from elongation morphology to fine equiaxed grains in the specimens of 25% cold rolled state, and ASBs became broader with increasing strain rate.

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Periodical:

Advanced Materials Research (Volumes 915-916)

Pages:

567-571

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.915-916.567

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Online since:

April 2014

Authors:

Tong Bo Wang*, Bo Long Li, Mian Li, Zuo-Ren Nie

Keywords:

Adiabatic Shear Sensitivity, Microstructure, SHPB, Strain Rate

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