TY - JOUR
T1 - Thermo-mechanical characterisation of selective laser melted Ti-5Al-5Mo-5V-1Cr-1Fe alloy under high strain rate loadings
AU - Zhang, Yufeng
AU - Yuan, Ye
AU - Zhou, Qiang
AU - Zhang, Wangfeng
AU - Chen, Pengwan
N1 - Publisher Copyright:
© 2025 Elsevier B.V.
PY - 2025/3/5
Y1 - 2025/3/5
N2 - This paper investigates the thermo-mechanical response and failure behaviour of a selective laser melted (SLM) near-β Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy under high strain rate loading. A series of dynamic compression tests were performed using a split Hopkinson pressure bar at various temperatures (293–1173 K) and strain rates (1000–5000 s−1). Optical microscopy (OM), scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) were employed to analyse the microstructure of the specimens and fracture surfaces of failed specimens. The dynamic compression stress-strain response, strain rate effect, thermo-softening effect and work hardening effect were studied. The results showed strong temperature and strain rate dependency for SLM Ti-55511. Higher temperature led to an improved ductility for SLM Ti-55511 alloy, demonstrated by the higher number of elongated dimples on the fracture surface. A modified Johnson-Cook constitutive model was established to predict the thermo-mechanical behaviour of SLM Ti-55511 alloy.
AB - This paper investigates the thermo-mechanical response and failure behaviour of a selective laser melted (SLM) near-β Ti-5Al-5Mo-5V-1Cr-1Fe (Ti-55511) alloy under high strain rate loading. A series of dynamic compression tests were performed using a split Hopkinson pressure bar at various temperatures (293–1173 K) and strain rates (1000–5000 s−1). Optical microscopy (OM), scanning electron microscopy (SEM) and electron backscatter diffraction (EBSD) were employed to analyse the microstructure of the specimens and fracture surfaces of failed specimens. The dynamic compression stress-strain response, strain rate effect, thermo-softening effect and work hardening effect were studied. The results showed strong temperature and strain rate dependency for SLM Ti-55511. Higher temperature led to an improved ductility for SLM Ti-55511 alloy, demonstrated by the higher number of elongated dimples on the fracture surface. A modified Johnson-Cook constitutive model was established to predict the thermo-mechanical behaviour of SLM Ti-55511 alloy.
KW - High strain rate
KW - Modified Johnson-Cook model
KW - Selective laser melting
KW - Thermo-mechanical response
KW - Ti-5Al-5Mo-5V-1Cr-1Fe
UR - https://www.scopus.com/pages/publications/85217905810
U2 - 10.1016/j.jallcom.2025.179099
DO - 10.1016/j.jallcom.2025.179099
M3 - Article
AN - SCOPUS:85217905810
SN - 0925-8388
VL - 1018
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
M1 - 179099
ER -