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- W4313479859 abstract "Ti6Al4V alloy sample manufactured by selective electron beam melting technology as well as its heat-treated sample, and hot-rolled Ti6Al4V alloy sample were the research objects in the present work. The effects of microstructure and printed pores on the localized adiabatic shearing behavior of the printed, heat-treated and hot-rolled Ti6Al4V alloy were firstly investigated with the split Hopkinson compression bar, metallurgical microscopy and X-ray computed tomography technology. The hot-rolled sample had fine equiaxed grains, no printed pores and the highest density, so its adiabatic shearing susceptibility was the lowest. The printed sample had the highest porosity, the lowest density, and the orientation of the c-axis of hcp-α phase parallel to the loading direction led to the higher critical resolved shear stress and flow stress during compression deformation, thus the corresponding thermal softening effect was stronger, and its adiabatic shearing susceptibility was the highest. While the porosity of the heat-treated sample was smaller and the density was larger, the columnar grains were transformed into equiaxed grains after heat treatment, so the adiabatic shearing susceptibility of the heat-treated sample was lower than that of the printed sample. The existence of printed pores was equivalent to omitting the void nucleation stage of microcrack formation during dynamic deformation, and the printed pores located in the 45o shearing direction would grow and converge directly along the shearing direction to form microcracks, and also accelerate the propagation of microcracks and more easily cause adiabatic shearing fracture. The porosity of the sample decreased after heat treatment, but the average volume and average equivalent diameter of the pores decreased, and the number of pores increased instead. The greater the number of pores inside the material, the greater the chance of pores in the shearing direction, so the heat-treated sample was more likely to initiate microcracks in the adiabatic shearing band, and the crack propagation rate would be faster and more likely to cause adiabatic shearing fracture than the printed sample." @default.
- W4313479859 created "2023-01-06" @default.
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- W4313479859 date "2023-02-01" @default.
- W4313479859 modified "2023-10-01" @default.
- W4313479859 title "Effect of microstructure and printed pores on the adiabatic shearing behavior of Ti6Al4V titanium alloy manufactured by selective electron beam melting" @default.
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- W4313479859 doi "https://doi.org/10.1016/j.matchar.2022.112642" @default.
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