Bernd Wolter
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View article: Nondestructive material characterization and component identification in sheet metal processing with electromagnetic methods
Nondestructive material characterization and component identification in sheet metal processing with electromagnetic methods Open
Electromagnetic methods for non-destructive evaluation (NDE) are presented, with which sheet metal components can be identified and their material properties can be characterized. The latter is possible with 3MA, the Micromagnetic Multipar…
View article: Soft sensor for in-line quality control of turning processes based on non-destructive testing techniques and advanced data fusion
Soft sensor for in-line quality control of turning processes based on non-destructive testing techniques and advanced data fusion Open
This study describes the systematic process of training, testing, and validating a soft sensor designed for quality control of a turning process on components made of AISI 4140 steel. The soft sensor allows product quality to be predicted …
View article: Monitoring of Joint Gap Formation in Laser Beam Butt Welding using Neural Network-Based Acoustic Emission Analysis
Monitoring of Joint Gap Formation in Laser Beam Butt Welding using Neural Network-Based Acoustic Emission Analysis Open
This study aimed to explore the feasibility of using airborne acoustic emission in laser beam butt welding for the development of an automated classification system based on neural networks. The focus was on monitoring the formation of joi…
View article: Temporal Resolution of Acoustic Process Emissions for Monitoring Joint Gap Formation in Laser Beam Butt Welding
Temporal Resolution of Acoustic Process Emissions for Monitoring Joint Gap Formation in Laser Beam Butt Welding Open
With the increasing power and speed of laser welding, in-process monitoring has become even more crucial to ensure process stability and weld quality. Due to its low cost and installation flexibility, acoustic process monitoring is a promi…
View article: Temporal Resolution of Acoustic Process Emissions for Monitoring Joint Gap Formation in Laser Beam Butt Welding
Temporal Resolution of Acoustic Process Emissions for Monitoring Joint Gap Formation in Laser Beam Butt Welding Open
With increasing power and speed of laser welding, in-process monitoring has become even more crucial to ensure process stability and weld quality. Due to its low cost and installation flexibility, acoustic process monitoring is a promising…
View article: Monitoring of Joint Gap Formation in Laser Beam Butt Welding by Neural Network-Based Acoustic Emission Analysis
Monitoring of Joint Gap Formation in Laser Beam Butt Welding by Neural Network-Based Acoustic Emission Analysis Open
This study aimed to explore the feasibility of using airborne acoustic emission in laser beam butt welding for the development of an automated classification system based on neural networks. The focus was on monitoring the formation of joi…
View article: Blech zerstörungsfrei prüfen und selbstorganisiert verarbeiten
Blech zerstörungsfrei prüfen und selbstorganisiert verarbeiten Open
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View article: Modeling the effect of workpiece temperature on micromagnetic high-speed-3MA-testing in case of AISI 4140
Modeling the effect of workpiece temperature on micromagnetic high-speed-3MA-testing in case of AISI 4140 Open
View article: Electromagnetic examination of hardened depth of steel using 2D nonlinear hysteresis FEM analysis
Electromagnetic examination of hardened depth of steel using 2D nonlinear hysteresis FEM analysis Open
The inspection of the hardened depth on surface carbon hardening steel is an important quality parameter inmaintenance and for the other applications as well. For this purpose, two kinds of samples with differenthardening depth are studied…
View article: Micromagnetic and Microstructural Characterization of Ferromagnetic Steels in Different Heat Treatment Conditions
Micromagnetic and Microstructural Characterization of Ferromagnetic Steels in Different Heat Treatment Conditions Open
The paper addresses the investigation of microstructures from AISI 52100 and AISI 4140 in hardened as well as in quenched and tempered conditions. The specimens are compared in terms of their magnetic hysteresis and their microstructural a…
View article: A comparison between ABC method and PSO method for Hysteresis Parameter determination
A comparison between ABC method and PSO method for Hysteresis Parameter determination Open
International audience
View article: Modeling of surface hardening and roughness induced by turning AISI 4140 QT under different machining conditions
Modeling of surface hardening and roughness induced by turning AISI 4140 QT under different machining conditions Open
For this work, the surface-layer states of turned AISI 4140 QT were investigated by means of surface roughness and microhardness measurements. Different machining conditions are regarded, namely cutting velocity, feed rate, tool wear and t…
View article: Investigations on Corrosion Properties of Ultrasound‐Enhanced Friction‐Stir‐Welded Aluminum/Dual‐Phase Steel Joints
Investigations on Corrosion Properties of Ultrasound‐Enhanced Friction‐Stir‐Welded Aluminum/Dual‐Phase Steel Joints Open
Friction stir welding (FSW) is a solid‐state joining method that is suitable for joining dissimilar materials such as aluminum and steel due to its comparatively low process temperatures. Such hybrid joints are of great interest in view of…
View article: Working point determination of 3MA micromagnetic NDT-technique for production integrated detection of white layer during turning of AISI4140
Working point determination of 3MA micromagnetic NDT-technique for production integrated detection of white layer during turning of AISI4140 Open
View article: Frontmatter
Frontmatter Open
tm -Technisches MessenPlattform für Methoden, Systeme und Anwendungen in der Messtechnik.Organ des AHMT (Arbeitskreis der Hochschullehrer für Messtechnik e.V.), der AMA (Verband für Sensorik und Messtechnik e.V.) und der NAMUR (
View article: Frontmatter
Frontmatter Open
tm -Technisches MessenPlattform für Methoden, Systeme und Anwendungen in der Messtechnik.Organ des AHMT (Arbeitskreis der Hochschullehrer für Messtechnik e.V.), der AMA (Verband für Sensorik und Messtechnik e.V.) und der NAMUR (
View article: ABC method for hysteresis model parameters identification
ABC method for hysteresis model parameters identification Open
View article: Experimental identification of a surface integrity model for turning of AISI4140
Experimental identification of a surface integrity model for turning of AISI4140 Open
In this work an experimental study of the turning of AISI4140 is presented. The scope is the understanding of the workpiece microstructure and hardness-depth-profiles which result from different cutting conditions and thus thermomechanical…
View article: Acoustic process monitoring in laser beam welding
Acoustic process monitoring in laser beam welding Open
Structure-borne acoustic emission (AE) measurement shows major advantages regarding quality assurance and process control in industrial applications. In this paper, laser beam welding of steel and aluminum was carried out under varying pro…
View article: Application of the hybrid process ultrasound enhanced friction stir welding on dissimilar aluminum/dual‐phase steel and aluminum/magnesium joints
Application of the hybrid process ultrasound enhanced friction stir welding on dissimilar aluminum/dual‐phase steel and aluminum/magnesium joints Open
Friction stir welding as a solid‐state joining method with its comparatively low process temperatures is suitable for joining dissimilar materials like aluminum/magnesium or aluminum/steel. Such hybrid joints are of great interest regardin…
View article: Nondestructive Testing with 3MA—An Overview of Principles and Applications
Nondestructive Testing with 3MA—An Overview of Principles and Applications Open
More than three decades ago, at Fraunhofer IZFP, research activities that were related to the application of micromagnetic methods for nondestructive testing (NDT) of the microstructure and the properties of ferrous materials commenced. So…
View article: Combination of electromagnetic measurements and FEM simulations for nondestructive determination of mechanical hardness
Combination of electromagnetic measurements and FEM simulations for nondestructive determination of mechanical hardness Open
The paper considers the Rockwell hardness investigation by finite element simulation in inspection situation of press hardened parts using the 3MA non-destructive testing system. The FEM model is based on robust strategy calculation which …
View article: Hybrid Al/steel-joints manufactured by ultrasound enhanced friction stir welding (USE-FSW): Process comparison, nondestructive testing and microscopic analysis
Hybrid Al/steel-joints manufactured by ultrasound enhanced friction stir welding (USE-FSW): Process comparison, nondestructive testing and microscopic analysis Open
The process of friction stir welding (FSW) is an innovative joining technique, which proved its potential in joining dissimilar metals that are poorly fusion weldable. This ability opens a wide range for applications in industrial fields, …
View article: Hybrid joints manufactured by ultrasound enhanced friction stir welding (USE-FSW) - corrosion properties
Hybrid joints manufactured by ultrasound enhanced friction stir welding (USE-FSW) - corrosion properties Open
To realize lightweight structures of material combinations like aluminum/magnesium and aluminum/steel an Ultrasound Enhanced Friction Stir Welding (USE-FSW) process was used. This process has a beneficial influence on the resulting microst…
View article: Production integrated nondestructive testing of composite materials and material compounds – an overview
Production integrated nondestructive testing of composite materials and material compounds – an overview Open
Composite materials and material compounds are of increasing importance, because of the steadily rising relevance of resource saving lightweight constructions. Quality assurance with appropriate Nondestructive Testing (NDT) methods is a ke…
View article: 3MA NDT Investigation for Process Monitoring and Quality Control in Press Hardened Steel
3MA NDT Investigation for Process Monitoring and Quality Control in Press Hardened Steel Open
International audience
View article: Recent Developments for Ultrasonic-Assisted Friction Stir Welding: Joining, Testing, Corrosion - an Overview
Recent Developments for Ultrasonic-Assisted Friction Stir Welding: Joining, Testing, Corrosion - an Overview Open
Due to the steadily increasing demand on innovative manufacturing processes, modern lightweight construction concepts become more and more important. Especially joints of dissimilar metals offer a variety of advantages due to their high po…