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Direct diode laser deposition of functionally graded Ti-6AL-4V and inconel 718 components

Research output: Contribution in Book/Report/ProceedingsPaper


Publication date2008
Host publicationProceedings of the 3rd Pacific International Conference on Applications of Lasers and Optics (PICALO)
PublisherLaser Institute of America
Number of pages6
Original languageEnglish


Laser direct metal deposition (LDMD) has developed from a prototyping to a single metal manufacturing tool. Its potential for creating multi-material and functionally graded structures is now beginning to be explored. In this work, three dimensional functionally graded structures of Ti-6Al-4V and Inconel 718 are fabricated by laser direct metal deposition (LDMD) on Inconel 718 substrate. The multi-track parts are built at a range of powder mass flow rates using a side nozzle and 1.5 kW Diode laser operating in both continuous and pulsed beam modes. Microstructure characterization and phase identification are performed by optical microscopy and X-ray diffraction. Only two samples are free of macro-scale cracks, one prepared with a continuous laser beam and one prepared with the beam in pulsed mode. XRD results show the presence of the brittle Ti2Ni phase in all samples.