Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition

Gipperich, Marius; Peters, Christian; Riepe, Jan; Day, Robin; Bergs, Thomas

doi:10.1117/12.2576112

Cited by 2 publications

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“…Because of the good focusability of a laser source and the high degree of control over parameters like laser power, pulse duration, and wavelength, the laser as a processing tool offers the great advantage of precise energy deposition on the substrate. This makes the process suitable for manufacturing applications in a wide range of industries for example for tool making or tool repair [1]. Within the DED, mainly metal powders (e.g., in LPBF: laser powder bed fusion) or wires are used as feedstock material.…”

Section: Introductionmentioning

confidence: 99%

Inline Optical Coherence Tomography for Multidirectional Process Monitoring in a Coaxial LMD-w Process

et al. 2022

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Within additive manufacturing, process stability is still an unsolved challenge. Process instabilities result from the complexity of laser deposition processes and the dependence of the quality of the workpiece on a variety of factors in the process. Because a stable process is dependent on many different factors, permanent precise inline monitoring is required. The suitability of the optical coherence tomography (OCT) measuring system integrated into a wire-based laser metal deposition (LMD-w) process for the task of process control results from its high resolution and high measuring speed, and from coaxial integration into the laser process, which allows for a spatially and temporally resolved representation of the weld bead topography during the process. To realize this, a spectral domain OCT (SD-OCT) system was developed and integrated into the beam path of the process laser. With the aid of suitable optics, circular scanning was realized, which allows for the 3D depth information to be displayed independently of the direction of movement of the processing head and the centrally running wire. OCT makes it possible to detect the process-typical topography deviations caused by process variations and thus paves the way for adaptive process control that could make additive laser processes more reproducible and precise in the future.

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Section: Introductionmentioning

confidence: 99%

Inline Optical Coherence Tomography for Multidirectional Process Monitoring in a Coaxial LMD-w Process

et al. 2022

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Toward Antifragile Manufacturing: Concepts from Nature and Complex Human-Made Systems to Gain from Stressors and Volatility

Becker,

Kasprowicz,

Kurkina

et al. 2024

Transformation Towards Sustainability

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Taleb coined the term “antifragility” to describe systems that benefit from stressors and volatility. While nature provides several examples of systems with antifragile behavior, manufacturing has so far only aimed to avoid or absorb stressors and volatility. This article surveys existing examples of antifragile system behavior in biology, biotechnology, software engineering, risk management, and manufacturing. From these examples, components of antifragile systems and principles to implement these components are derived and organized in a framework. The framework intends to serve as guidance for practitioners as well as starting point for future research on the design of antifragile systems in manufacturing.

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Reflectometry-based investigation of temperature fields during dual-beam Laser Metal Deposition

Cited by 2 publications

References 0 publications

Inline Optical Coherence Tomography for Multidirectional Process Monitoring in a Coaxial LMD-w Process

Inline Optical Coherence Tomography for Multidirectional Process Monitoring in a Coaxial LMD-w Process

Toward Antifragile Manufacturing: Concepts from Nature and Complex Human-Made Systems to Gain from Stressors and Volatility

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