The impact of the surface convection generated by argon shielding gas used during Laser Engineered Net Shaping (LENS) on the deposited part is investigated. LENS generates complex thermal histories in the build that are dependent upon the material, part geometry, laser heat input, mass feed rate, and radiative as well as convective cooling. It has been shown that the deposition track and final part quality are subject to many of these considerations; however, no investigation has been undertaken to understand the impact of surface convection resulting from changing the argon shielding gas flow rate. A thermo-mechanical finite element analysis with measurement-based convection models is used to study the effects from different argon shielding flow rates on the temperature history, distortion, and residual stress of thin wall Ti-6Al-4V structures. The results from three cases show that reducing the shielding flow rate by half increases the temperature by 5% to 13%, while decreasing the deflection and residual stress.
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ASME 2015 International Manufacturing Science and Engineering Conference
June 8–12, 2015
Charlotte, North Carolina, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-5682-6
PROCEEDINGS PAPER
The Impact of Argon Shielding Flow Rate on Laser Engineered Net Shaping (LENS) of Ti-6Al-4V
J. C. Heigel,
J. C. Heigel
The Pennsylvania State University, University Park, PA
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P. Michaleris
P. Michaleris
The Pennsylvania State University, University Park, PA
Search for other works by this author on:
J. C. Heigel
The Pennsylvania State University, University Park, PA
P. Michaleris
The Pennsylvania State University, University Park, PA
Paper No:
MSEC2015-9244, V001T02A060; 10 pages
Published Online:
September 25, 2015
Citation
Heigel, JC, & Michaleris, P. "The Impact of Argon Shielding Flow Rate on Laser Engineered Net Shaping (LENS) of Ti-6Al-4V." Proceedings of the ASME 2015 International Manufacturing Science and Engineering Conference. Volume 1: Processing. Charlotte, North Carolina, USA. June 8–12, 2015. V001T02A060. ASME. https://doi.org/10.1115/MSEC2015-9244
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