Effects of high temperature and high strain rate on dynamic compression performance and adiabatic shear sensitivity of TC21 titanium alloy

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Journal of Vibration and Shock ›› 2020, Vol. 39 ›› Issue (19) : 135-140.

ZHANG Junxi1,2, YI Xiangbin2, SHEN Jiancheng2, LI Baodong2, TANG Linhu1, XU Chuangwen2

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Abstract

Effects of high temperature and high strain rate on dynamic compression performance and adiabatic shear sensitivity of TC21 titanium alloy with basket-weave microstructure were studied using the split Hopkinson pressure bar (SHPB). Results showed that under the same temperature (25-350 ℃), the material has a certain strain rate strengthening and plasticizing effect; under 450 ℃, it has strain rate softening phenomenon; under the same strain rate, its dynamic compressive strength decreases with increase in temperature; when the strain rate is 2 000 s-1 and 3 000 s-1, all specimens have shear failure; with increase in temperature, specimens’ adiabatic sensitivity grows and their shear band width increases.

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TC21 titanium alloy / dynamic compression performance / adiabatic shear sensitivity / adiabatic shear band

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ZHANG Junxi1,2, YI Xiangbin2, SHEN Jiancheng2, LI Baodong2, TANG Linhu1, XU Chuangwen2. Effects of high temperature and high strain rate on dynamic compression performance and adiabatic shear sensitivity of TC21 titanium alloy[J]. Journal of Vibration and Shock, 2020, 39(19): 135-140

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