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Proceedings Paper

Femtosecond fiber laser additive manufacturing of tungsten
Author(s): Shuang Bai; Jian Liu; Pei Yang; Meiyu Zhai; Huan Huang; Lih-Mei Yang
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Paper Abstract

Additive manufacturing (AM) is promising to produce complex shaped components, including metals and alloys, to meet requirements from different industries such as aerospace, defense and biomedicines. Current laser AM uses CW lasers and very few publications have been reported for using pulsed lasers (esp. ultrafast lasers). In this paper, additive manufacturing of Tungsten materials is investigated by using femtosecond (fs) fiber lasers. Various processing conditions are studied, which leads to desired characteristics in terms of morphology, porosity, hardness, microstructural and mechanical properties of the processed components. Fully dense Tungsten part with refined grain and increased hardness was obtained and compared with parts made with different pulse widths and CW laser. The results are evidenced that the fs laser based AM provides more dimensions to modify mechanical properties with controlled heating, rapid melting and cooling rates compared with a CW or long pulsed laser. This can greatly benefit to the make of complicated structures and materials that could not be achieved before.

Paper Details

Date Published: 6 April 2016
PDF: 10 pages
Proc. SPIE 9738, Laser 3D Manufacturing III, 97380U (6 April 2016); doi: 10.1117/12.2217551
Show Author Affiliations
Shuang Bai, PolarOnyx, Inc. (United States)
Jian Liu, PolarOnyx, Inc. (United States)
Pei Yang, PolarOnyx, Inc. (United States)
Meiyu Zhai, PolarOnyx, Inc. (United States)
Huan Huang, PolarOnyx, Inc. (United States)
Lih-Mei Yang, Laser-FEMTO, Inc. (United States)

Published in SPIE Proceedings Vol. 9738:
Laser 3D Manufacturing III
Bo Gu; Henry Helvajian; Alberto Piqué, Editor(s)

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