Abstract
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.
Original language | English |
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Title of host publication | 3rd Pacific International Conference on Applications of Lasers and Optics, PICALO 2008 - Conference Proceedings |
Publisher | Laser Institute of America |
Pages | 273-278 |
Number of pages | 6 |
ISBN (Print) | 9780912035895 |
DOIs | |
Publication status | Published - 2008 |
Externally published | Yes |
Event | Pacific International Conference on Applications of Lasers and Optics 2008 - Beijing, China Duration: 16 Apr 2008 → 18 Apr 2008 Conference number: 3rd |
Conference
Conference | Pacific International Conference on Applications of Lasers and Optics 2008 |
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Abbreviated title | PICALO 2008 |
Country | China |
City | Beijing |
Period | 16/04/08 → 18/04/08 |
Keywords
- Continuous wave
- Direct metal deposition
- Inconel 718
- Laser
- Pulsed wave
- Ti-6Al-4V