In-situ observation of end crater crack mechanisms in AA7075 during laser beam welding using synchrotron radiation

Forster C, Döring M, Spurk C, Hummel M, Olowinsky A, Beckmann F, Moosmann J, Schmidt M (2024)

Publication Type: Conference contribution

Publication year: 2024

Journal

Procedia CIRP Curran

Publisher: Elsevier B.V.

Book Volume: 124

Pages Range: 464-467

Conference Proceedings Title: Procedia CIRP

Event location: Furth, DEU

DOI: 10.1016/j.procir.2024.08.154

Abstract

AA7075 is increasingly used in the aerospace industry due to its excellent strength to weight ratio. However, due to an extended solidification interval of its alloy components magnesium, zinc and copper, it is highly susceptible to solidification cracking and thus has limited suitability for laser beam welding processing. The formation of end crater cracks is a particular challenge. This study investigates the formation and propagation of cracks in AA7075 during laser beam welding at different beam diameters, feed rates and laser powers by using an in-situ X-ray high-speed imaging technique utilizing synchrotron radiation. The experiments were conducted at the German Electron-Synchrotron (DESY) at Petra III, beamline P07. The results show a correlation between cumulative crack length, solidification rate and energy input, providing important insights to improve the weldability of AA7075.

Authors with CRIS profile

Carola Forster Lehrstuhl für Photonische Technologien (LPT) Markus Döring Lehrstuhl für Photonische Technologien (LPT) Michael Schmidt Lehrstuhl für Photonische Technologien (LPT)

Involved external institutions

Rheinisch-Westfälische Technische Hochschule (RWTH) Aachen DE Germany (DE) Fraunhofer-Institut für Lasertechnik (ILT) DE Germany (DE) Helmholtz-Zentrum Hereon DE Germany (DE)

How to cite

APA:

Forster, C., Döring, M., Spurk, C., Hummel, M., Olowinsky, A., Beckmann, F.,... Schmidt, M. (2024). In-situ observation of end crater crack mechanisms in AA7075 during laser beam welding using synchrotron radiation. In Michael Schmidt, C.B. Arnold, K. Wudy (Eds.), Procedia CIRP (pp. 464-467). Furth, DEU: Elsevier B.V..

MLA:

Forster, Carola, et al. "In-situ observation of end crater crack mechanisms in AA7075 during laser beam welding using synchrotron radiation." Proceedings of the 13th CIRP Conference on Photonic Technologies, LANE 2024, Furth, DEU Ed. Michael Schmidt, C.B. Arnold, K. Wudy, Elsevier B.V., 2024. 464-467.

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