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Published in: Progress in Additive Manufacturing 2/2019

22-10-2018 | Full Research Article

Laser beam build-up welding of AlSi12-powder on AlSi1MgMn-alloy substrate

Authors: Wei Zhang, Anton Evdokimov, Leander Schleuß, Ralf Ossenbrink, Vesselin Michailov

Published in: Progress in Additive Manufacturing | Issue 2/2019

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Abstract

In the present work, laser beam build-up welding of AlSi12 alloy powder on AlSi1MgMn-alloy (EN AW-6082) substrate has been studied to determine the laser deposition strategy for fabrication of 3-D structure. First, the influence of laser power, scanning speed and powder feeding rate on the output parameters, such as clad geometry, dilution ratio, powder efficiency and porosity were analysed for deposition of a single track. Mathematical relationships were then established and the optimal parameters were identified by the desirability approach. Second, these optimal process parameters are furthermore adjusted to fabricate rectangular, cylindrical and complex combination volumes; different layer deposition strategies are used and evaluated. Finally, by using an adapted deposition strategy, one prototype consisted of different complexly shaped elements on one curved Al-alloy substrate without welding fusion defects was manufactured. The average tensile strength of deposited samples with four different layer deposition directions (vertical 0°/90°; horizontal 0°/90°; horizontal 0° and horizontal 90°) was measured, respectively, which are comparable strengths or higher than those of cast samples. The microstructure of the laser-deposited material is investigated using optical microscopy and scanning electron microscopy as well as microcomputed tomography. Microstructure and hardness of deposited multilayers exhibit inhomogeneous distributions, which vary with the deposit location.

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Metadata
Title
Laser beam build-up welding of AlSi12-powder on AlSi1MgMn-alloy substrate
Authors
Wei Zhang
Anton Evdokimov
Leander Schleuß
Ralf Ossenbrink
Vesselin Michailov
Publication date
22-10-2018
Publisher
Springer International Publishing
Published in
Progress in Additive Manufacturing / Issue 2/2019
Print ISSN: 2363-9512
Electronic ISSN: 2363-9520
DOI
https://doi.org/10.1007/s40964-018-0065-z

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