Post-processing of 3D-printed parts using femtosecond and picosecond laser radiation

Ilya Mingareev; Nils Gehlich; Tobias Bonhoff; Wilhelm Meiners; Ingomar Kelbassa; Tim Biermann; Martin C. Richardson

doi:10.1117/12.2040049

6 March 2014 Post-processing of 3D-printed parts using femtosecond and picosecond laser radiation

Ilya Mingareev, Nils Gehlich, Tobias Bonhoff, Wilhelm Meiners, Ingomar Kelbassa, Tim Biermann, Martin C. Richardson

Proceedings Volume 8970, Laser 3D Manufacturing; 89700R (2014) https://doi.org/10.1117/12.2040049
Event: SPIE LASE, 2014, San Francisco, California, United States

Abstract

Additive manufacturing, also known as 3D-printing, is a near-net shape manufacturing approach, delivering part geometry that can be considerably affected by various process conditions, heat-induced distortions, solidified melt droplets, partially fused powders, and surface modifications induced by the manufacturing tool motion and processing strategy. High-repetition rate femtosecond and picosecond laser radiation was utilized to improve surface quality of metal parts manufactured by laser additive techniques. Different laser scanning approaches were utilized to increase the ablation efficiency and to reduce the surface roughness while preserving the initial part geometry. We studied post-processing of 3D-shaped parts made of Nickel- and Titanium-base alloys by utilizing Selective Laser Melting (SLM) and Laser Metal Deposition (LMD) as additive manufacturing techniques. Process parameters such as the pulse energy, the number of layers and their spatial separation were varied. Surface processing in several layers was necessary to remove the excessive material, such as individual powder particles, and to reduce the average surface roughness from asdeposited 22-45 μm to a few microns. Due to the ultrafast laser-processing regime and the small heat-affected zone induced in materials, this novel integrated manufacturing approach can be used to post-process parts made of thermally and mechanically sensitive materials, and to attain complex designed shapes with micrometer precision.

Citation Download Citation

Ilya Mingareev, Nils Gehlich, Tobias Bonhoff, Wilhelm Meiners, Ingomar Kelbassa, Tim Biermann, and Martin C. Richardson "Post-processing of 3D-printed parts using femtosecond and picosecond laser radiation", Proc. SPIE 8970, Laser 3D Manufacturing, 89700R (6 March 2014); https://doi.org/10.1117/12.2040049

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available