Dynamic mechanical behavior and energy release characteristics of Al0.3V0.1NbZr1.3Ti1.4Ta0.8 high-entropy alloy
In order to investigate the mechanical behaviour and invasive energy release characteristics of Al0.3V0.1NbZr1.3Ti1.4Ta0.8 high-entropy alloy(HEA)under different loading rates,dynamic mechanical property tests were carried out by using a split Hopkinson rod(SHPB),and its mechanical behaviour,deformation mechanism and energy release characteristics under different strain rates were studied by combining with X-ray diffraction(XRD),scanning electron microscopy(SEM)and transmission electron microscopy(TEM).The penetration experiment of Al0.3V0.1NbZr1.3Ti1.4Ta0.8 high-entropy alloy on 6 mm thick Q235 steel plate was carried out based on the 12.7 mm ballistic gun experimental platform,and the relationship between the penetration and energy release characteristics and the impact velocity was analysed.The results show that the initial microstructure of the material is mainly an ordered body-centred cubic(B2)phase,and a large number of dislocations are generated inside the material during the dynamic loading process,with excellent compression plasticity,and cracks expand along the grain boundaries inside the material to form a large number of secondary cracks.With the increase of the loading rate,the energy release reaction occurs in the material,the larger the loading rate,the fuller the material crushing,the more intense the energy release reaction of the material,the high-speed loading conditions show excellent penetration performance,and after impacting the target plate,the energy release reaction can occur to ignite the target after the cotton.
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