Laser powder bed fusion of stainless steel 316L using a combination of high-power diode laser and galvanometer scanner

Tim Lantzsch; Martin Traub; Thomas Westphalen; Christian Tenbrock; Johannes Henrich Schleifenbaum

doi:10.1117/12.2573128

5 March 2021 Laser powder bed fusion of stainless steel 316L using a combination of high-power diode laser and galvanometer scanner

Tim Lantzsch, Martin Traub, Thomas Westphalen, Christian Tenbrock, Johannes Henrich Schleifenbaum

Author Affiliations +

Proceedings Volume 11677, Laser 3D Manufacturing VIII; 116770M (2021) https://doi.org/10.1117/12.2573128
Event: SPIE LASE, 2021, Online Only

Abstract

In recent years, Laser Powder Bed Fusion (LPBF) has become an industrially established manufacturing technique due to the possibility to manufacture complex part geometries without additional tools. State-of-the-art LPBF machines feature a combination of (multiple) fiber lasers and galvanometer scanners due to their high dynamic and excellent focusability, leading to significant investment costs. Highly efficient high-power diode lasers (HP-DL) could present an alternative for L-PBF machines. However, the lower beam quality (BPP > 8 mm · mrad) and spectral width (920 – 1050 nm) of commercial HP-DL results in chromatic aberrations and reduced focusability, thus making modifications to LPBF machines necessary. Current approaches to address these challenges rely on a combination of fixed focusing optics with a gantry-based positioning system resulting in less dynamic laser positioning and thus reduced system productivity and part quality. In this study an optical system, featuring a standard galvanometer scanner and a color corrected f-theta lens, is developed and integrated into a LPBF lab machine. The resulting machine configuration is combined with a fiber coupled HP-DL and used for the manufacturing of test specimen out of stainless steel AISI 316L. The manufactured parts using this approach are analyzed in terms of surface roughness, detail resolution and part density as well as build-up rate and compared with state-of-the-art LPBF-machines.

Conference Presentation

Citation Download Citation

Tim Lantzsch, Martin Traub, Thomas Westphalen, Christian Tenbrock, and Johannes Henrich Schleifenbaum "Laser powder bed fusion of stainless steel 316L using a combination of high-power diode laser and galvanometer scanner", Proc. SPIE 11677, Laser 3D Manufacturing VIII, 116770M (5 March 2021); https://doi.org/10.1117/12.2573128

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