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Development of a Metal 3D Printer Using Laser Powder Deposition and Process Optimization for Fabricating Titanium Alloy Parts  

Jeong, Wonjong (Department of Mechanical Engineering, POSTECH)
Kwon, Young-Sam (CetaTech)
kim, Dongsik (Department of Mechanical Engineering, POSTECH)
Publication Information
Laser Solutions / v.18, no.3, 2015 , pp. 1-5 More about this Journal
Abstract
A 3D printer based on laser powder deposition (LPD), also known as DED (direct energy deposition), has been developed for fabricating metal parts. The printer uses a ytterbium fiber laser (1070nm, 1kW) and is equipped with an Ar purge chamber, a three-dimensional translation stage and a powder feeding system composed of a powder chamber and delivery nozzles. To demonstrate the performance of the printer, a tapered cylinder of 320mm in height has been fabricated successfully using Ti-6Al-4V powders. The process parameters including the laser output power, the scan speed, and the powder feeding rate have been optimized. A 3D printed test specimen shows mechanical properties (yield strength, ultimate tensile strength, and elongation) exceeding the criteria to employed in a variety of Ti alloy applications.
Keywords
Near Net Shape; 3D printing; Additive manufacturing; Direct energy deposition(DED); Laser Powder Deposition; Ti-6Al-4V alloys;
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  • Reference
1 Y. W. Zhai et al., "Novel Forming of Ti-6Al-4V by Laser Engineered Net Shaping", Materials Science Forum, Vol. 765, 2013.
2 C. Qiu et al., "Fabrication of large Ti-6Al-4V structures by direct laser deposition," Journal of Alloys and Compounds, Vol. 629, 2015.
3 D. D. Gu et al., "Laser additive manufacturing of metallic components: Materials, processes and mechanisms", International Materials Reviews, Vol. 57, 2012.
4 B. Vamsi Krishna et al., "Low stiffness porous Ti structures for load-bearing implants," Acta Biomaterialia, Vol. 3, 2007.
5 D. A. Hollander et al., "Structural, mechanical and in vitro characterization of individually structured Ti-6Al-4V produced by direct laser forming," Biomaterials, Vol. 27, 2006.
6 P. A. Kobryn et al., "The effect of laser power and traverse speed on microstructure, porosity, and build height in laser-deposited Ti-6Al-4V," Scripta Materialia, Vol. 43, 2000.
7 J. Alcisto et al., "Tensile Properties and Microstructures of Laser-Formed Ti-6Al-4V," Journal of Materials Engineering and Performance, Vol. 20, 2011.
8 A. Bandyopadyay et al., "Application of laser engineered net shaping (LENS) to manufacture porous and functionally graded structures for load bearing implants", Journal of Materials Science, Vol. 20, 2008.