Influence of Strain Rate and Temperature on the Visco-Plastic Properties of Commercially Pure Titanium and Ti6Al4V Titanium Alloy
Journal Title: Problemy Mechatroniki. Uzbrojenie, lotnictwo, inżynieria bezpieczeństwa - Year 2015, Vol 6, Issue 2
Abstract
The paper presents results of tests concerning visco-plastic properties of commercially pure titanium and Ti6Al4V titanium alloy. The analyses were carried out at wide range of strain rates from 2 x 10[sup]-4[/sup] s[sup]-1[/sup] to 2 x 10[sup]3[/sup] s[sup]-1[/sup] using servo-hydraulic testing machine and Hopkinson bar at quasi-static and dynamic range of loadings, respectively. The influence of temperature on the compressive curves was determined within the range of temperatures from 23°C to 400°C applying Hopkinson bar equipped with temperature chamber. Taking into account obtained results, the coefficients of Johnson–Cook (JC) constitutive model were calibrated. Mechanical investigations were accompanied by microstructural analysis in order to determine influence of temperature and rate of deformation on the plastic deformation mechanisms.
Authors and Affiliations
Wojciech MOĆKO
Keywords
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