High‐rate characterization of additively manufactured Ti‐6Al‐4V using Taylor cylinder impact test: Experiments
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Abstract
Fracture behavior of additively manufactured (AM) Ti-6Al-4V has been investigated under quasistatic and impact loading. Taylor cylinder impact tests, on material printed along different directions, have been performed at various velocity to determine high-rate material deformation and impact velocity for damage initiation. Test results revealed that, although the AM material under quasistatic loading condition shows better characteristics than the corresponding wrought material grade, under impact condition, fracture in AM material occurred at an impact velocity almost half of that of wrought grade and at a strain 10 time less of the quasistatic uniaxial fracture strain. Microscopy investigation seems to indicate that pre-existing microvoids produced by the AM process promote shear band development under impact loading causing fracture at much lower strain.
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