Investigation of the microstructure and surface morphology of a Ti6Al4V plate fabricated by vacuum selective laser melting
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As an additive manufacturing technology, the selective laser melting (SLM) process is useful to directly form complicated shapes. The SLM process in a vacuum has been used to fabricate three-dimensional Ti6Al4V (Ti64) plates because this method can control the phase transformation. To investigate the laser melting and solidification dynamics, the formation of a Ti64 plate by SLM in a vacuum was captured by a high-speed video camera. Due to the effects of temperature and scanning speed on the phase transformation, the crystal orientation was evaluated with X-ray diffraction. A phase transformation of the crystal orientation occurred as the baseplate temperature was heated up from 50 to 150 °C.
KeywordsScanning Speed Crystal Orientation Molten Pool Selective Laser Melting Ti64 Powder
This work is partly supported by the New Energy and Industrial Technology Development Organization (NEDO) of Japan.