Dynamic behaviour and shock-induced martensite transformation in near-beta Ti-5553 alloy under high strain rate loading
1 School of Materials Science and Engineering, Beijing Institute of Technology, 100081 Beijing, China
2 National Key Lab of Science and Technology on Materials under Shock and Impact, Beijing Institute of Technology, 100081 Beijing, China
a Corresponding author: email@example.com
Published online: 7 September 2015
Ti-5553 alloy is a near-beta titanium alloy with high strength and high fracture toughness. In this paper, the dynamic behaviour and shock-induced martensite phase transformation of Ti-5553 alloy with alpha/beta phases were investigated. Split Hopkinson Pressure Bar was employed to investigate the dynamic properties. Microstructure evolutions were characterized by Scanning Electronic Microscopy and Transmission Electron Microscope. The experimental results have demonstrated that Ti-5553 alloy with alpha/beta phases exhibits various strain rate hardening effects, both failure through adiabatic shear band. Ti-5553 alloy with Widmannstatten microstructure exhibit more obvious strain rate hardening effect, lower critical strain rate for ASB nucleation, compared with the alloy with Bimodal microstructures. Under dynamic compression, shock-induced beta to alpha” martensite transformation occurs.
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