Influence of Solution and Ambient Temperature on Dynamic Compression Mechanical Properties and Adiabatic Shear Sensitivity of TC21 Titanium Alloy
ZHANG Junxi1,2, YI Xiangbin2, SHEN Jiancheng2, CHEN Baiming1, LI Baodong2, XU Chuangwen2
1 School of Material Engineering, Lanzhou Institute of Technology, Lanzhou 730050, China 2 Key Laboratory of Green Cutting Technology and Application in Gansu Province, Lanzhou Institute of Technology, Lanzhou 730050, China
Abstract: By using Hopkinson pressure bar test system, the dynamic mechanical properties and adiabatic shear sensitivity of TC21 titanium alloy were studied at 1 500 s-1 strain rate for different temperatures (25—400 ℃) . The results show that the dynamic strength was enhanced and the adiabatic sensitivity became higher with the increasing of the solution temperature, while the plastic strain and the shear band width were decreased. The main reasons for these changes are the decreasing of the total area and lamellar width of α phase. At the same time, with the ambient temperature increases, the dynamic compressive strength decreases, the adiabatic sensitivity increases, and the shear band width increases.
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2020, Vol. 34 
