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Benjamin Graf
Researcher at Fraunhofer Society
Publications - 29
Citations - 642
Benjamin Graf is an academic researcher from Fraunhofer Society. The author has contributed to research in topics: Welding & Laser beam welding. The author has an hindex of 9, co-authored 28 publications receiving 444 citations.
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Laser Metal Deposition as Repair Technology for Stainless Steel and Titanium Alloys
TL;DR: In this article, the influence of welding parameters on the microstructure and the heat affected zone has been studied, and an evaluation of the opportunities for an automatized repair process is made.
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Laser Metal Deposition as Repair Technology for a Gas Turbine Burner Made of Inconel 718
TL;DR: In this article, a production process for laser metal deposition is presented, and used to repair a gas turbine burner of Inconel 718, where different parameters for defined track geometries were determined to attain a near net shape deposition with consistent build-up rate for changing wall thicknesses over the manufacturing process.
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In-situ distortions in LMD additive manufacturing walls can be measured with digital image correlation and predicted using numerical simulations
TL;DR: In this article, a digital image correlation (DIC) is applied together with optical filters to measure in-situ distortions directly on a wall geometry produced with additive manufacturing (AM) laser metal deposition (LMD).
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Design of experiments for laser metal deposition in maintenance, repair and overhaul applications
Benjamin Graf,Stefan Ammer,Andrey Gumenyuk,Andrey Gumenyuk,Michael Rethmeier,Michael Rethmeier +5 more
TL;DR: In this article, a full factorial design is used to determine the effect of process parameters on the geometric dimensions of the weld bead, which can be used to adjust weld bead profile to the specific task.
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Finite element analysis of in-situ distortion and bulging for an arbitrarily curved additive manufacturing directed energy deposition geometry
Max Biegler,Angelina Marko,Benjamin Graf,Michael Rethmeier,Michael Rethmeier,Michael Rethmeier +5 more
TL;DR: In this article, a structural thermomechanical simulation model on an arbitrarily curved Directed Energy Deposition (DED) part is demonstrated for in-situ deformation and bulging behavior.