A4 Refereed article in a conference publication
Effect of joint-edge quality on mechanical properties of laser welded IN718
Authors: Parchegani, Saeid; Piili, Heidi; Salminen, Antti
Editors: Nadimpalli, Venkata Karthik; Mohanty, Sankhya; Jensen, Dorte Juul; Defer, Marion Caroline; Pan, Zhihao
Conference name: Nordic Laser Materials Processing Conference
Publisher: IOP Publishing
Publication year: 2025
Journal: IOP Conference Series: Materials Science and Engineering
Book title : 20th Nordic Laser Materials Processing Conference
Article number: 012012
Volume: 1332
ISSN: 1757-8981
eISSN: 1757-899X
DOI: https://doi.org/10.1088/1757-899X/1332/1/012012
Publication's open availability at the time of reporting: Open Access
Publication channel's open availability : Open Access publication channel
Web address : https://doi.org/10.1088/1757-899x/1332/1/012012
Self-archived copy’s web address: https://research.utu.fi/converis/portal/detail/Publication/505436741
Studies on laser welding of metals have shown that the joint -edge quality such as surface roughness and geometry could influence the weld penetration and efficiency thus impacting its mechanical properties. In this study, laser welding was used to join IN718 sheet plates (3.2 mm in thickness) in a butt-joint configuration. The joint edges were prepared with two different methods of laser cutting and standard milling to investigate the effect ofjoint -edge quality on the mechanical properties of the weld. The laser-cut joints showed a larger fusion zone (FZ) area due to their higher surface roughness. The mechanical properties such as hardness, ultimate tensile strength (UTS), and yield strength were comparable regardless of the joint -edge differences. However, the laser-cut joint showed inferior fatigue strength, assessed at 106 cycles, due to micro cracks (microfissures) in the heat affected zone (HAZ).
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Funding information in the publication:
The authors would like to thank Business Finland for funding this study via CaNeLis project as well as VADILA project funded by European Regional Development Fund.
