TY - JOUR

T1 - Ballistic tests on hot-rolled Ti-6Al-4V plates

T2 - Experiments and numerical approaches

AU - Janda, Alexander

AU - Ralph, Benjamin

AU - Demarty, Yaël

AU - Sorger, Marcel

AU - Ebenbauer, Stefan

AU - Prestl, Aude

AU - Siller, Ingo

AU - Stockinger, Martin

AU - Clemens, Helmut

N1 - Publisher Copyright: © 2022 China Ordnance Society

PY - 2023

Y1 - 2023

N2 - Superior ballistic performance and the lightweight character of Ti alloys are considered as main reasons for their use in armour applications against a broad spectrum of ballistic threats, e.g. bullet, fragment or blast impact. Because dynamic loading caused by typical penetrators is characterized by high strain rates, only specific test methods allow a closer investigation of the respective material behaviour. In the present study, quasi-static and dynamic compression tests as well as ballistic tests were conducted on a two-phase α+β alloy Ti-6Al-4V (in m%) manufactured by hot-rolling. Post-deformation heat treatments, influencing microstructure and mechanical properties were applied in order to compare three different microstructural configurations: as-rolled, mill-annealed and bimodal. While, on the one hand, ballistic tests were employed for the determination of the ballistic limit velocity v50, compression tests, on the other hand, delivered essential input parameters for the application of the Johnson-Cook constitutive model in a finite element simulation of the impact event. The comparison of experimental results to simulation results was supplemented by means of microstructural characterization of tested samples with the focus set on the prevalently observed deformation and damage mechanisms, as for example adiabatic shearing.

AB - Superior ballistic performance and the lightweight character of Ti alloys are considered as main reasons for their use in armour applications against a broad spectrum of ballistic threats, e.g. bullet, fragment or blast impact. Because dynamic loading caused by typical penetrators is characterized by high strain rates, only specific test methods allow a closer investigation of the respective material behaviour. In the present study, quasi-static and dynamic compression tests as well as ballistic tests were conducted on a two-phase α+β alloy Ti-6Al-4V (in m%) manufactured by hot-rolling. Post-deformation heat treatments, influencing microstructure and mechanical properties were applied in order to compare three different microstructural configurations: as-rolled, mill-annealed and bimodal. While, on the one hand, ballistic tests were employed for the determination of the ballistic limit velocity v50, compression tests, on the other hand, delivered essential input parameters for the application of the Johnson-Cook constitutive model in a finite element simulation of the impact event. The comparison of experimental results to simulation results was supplemented by means of microstructural characterization of tested samples with the focus set on the prevalently observed deformation and damage mechanisms, as for example adiabatic shearing.

KW - Adiabatic shear bands

KW - Ballistic performance

KW - FE simulation

KW - Intermetallic phase

KW - Split Hopkinson pressure bar

KW - Ti-6Al-4V

UR - http://www.scopus.com/inward/record.url?scp=85146321803&partnerID=8YFLogxK

U2 - 10.1016/j.dt.2022.11.012

DO - 10.1016/j.dt.2022.11.012

M3 - Article

AN - SCOPUS:85146321803

VL - 26.2023

SP - 39

EP - 53

JO - Defence Technology

JF - Defence Technology

SN - 2096-3459

IS - August

ER -