description

Cemented carbides today find a wide range of applications and are tailor-made according to their tasks. Carbide can only be produced by powder metallurgy. The mechanical properties are determined by the composition and granularity of the carbide material, metal binder and any additives. In addition to hardness testing, density testing, structural analysis and porosity tests, non-destructive measurements of magnetization and coercive force are routinely used for quality control according to DIN-ISO 3326. These magnetic properties provide information on the structure, composition and contamination in the sintered state. Although the evaluation draws on a great deal of experience, the measurement results in binary or ternary systems with complex manufacturing processes are often not clearly interpretable.

This project aims to make the magnetic characterization of cemented carbides and their conclusions on structural and mechanical properties more accurate. In addition to traditional measurements of M(H)-hysteresis, modern methods such as First-Order-Reversal-Curve (FORC) analysis and Artificial Intelligence (AI) for FORC diagrams will be added, which will make the interpretation more quantitative and clearer.

Today's magnetometers allow FORC measurements to be done within a reasonable time frame of a few minutes. These provide additional information about phase formation and impurities in the powder and sintered state. Despite vast experience, FORC diagrams are not easy to interpret. A so far unused approach should help. We want to interpret the FORC diagrams using Artificial Intelligence. After a learning phase, we expect quantitative statements on structure, composition, phase formation and contamination, as well as on mechanical properties such as hardness, tensile strength, etc. The above improvements are supported by (micro)magnetic simulations. On the one hand, these can calculate FORC diagrams of model systems and make them available to the deep-learning algorithm (or similar: Random Forest for example), and on the other hand, experimental data (M(H) and FORC) can be physically interpreted.

KI-Carbid

Details

Duration 01/04/2020 - 31/03/2023
Funding FFG
Program
Department

Department for Integrated Sensor Systems

Center for Micro and Nano Sensors

Principle investigator for the project (University for Continuing Education Krems) Univ.-Prof. Dr. Hubert Brückl
Project members

Team

Publications

Wenig, F.; Seidl, C.; Derler, B.; Rixrath, D.; Heschl, C.; Treytl, A.; Cerimovic, S.; Glatzl, T.; Kovacs, G.; Sauter, T.; Krammer, L.; Diwold, K.; Lechner, D. (2020). Optimierung der Gebäudeenergieeffizienz durch modellbasierte Energiestromanalyse mit non-invasiver Sensorik. Endbericht Projekt Optimas

Cerimovic, S.; Treytl, A.; Glatzl, T.; Beigelbeck, R.; Keplinger, F.; Sauter, T. (2019). Development and Characterization of Thermal Flow Sensors for Non-Invasive Measurements in HVAC Systems. Sensors 2019, Vol. 19(6): doi: 10.3390/s1906139

Glatzl, T.; Beigelbeck, R.; Cerimovic, S.; Steiner, H.; Wenig, F.; Sauter, T.; Treytl, A.; Keplinger, F. (2019). A Thermal Flow Sensor based on Printed Circuit Technology in Constant Temperature Mode for Various Fluids. Sensors, Vol. 19, no. 5: 1065

Wenig, F.; Seidl, C.; Derler, B.; Heschl, C.; Sauter, T.; Treytl, A. (2019). Towards non-invasive temperature measurements in HVAC: A characterization and correction approach. In: Proceedings of 2019 IEEE 28th International Symposium on Industrial Electronics (ISIE): 1568-1572, IEEE, Vancouver

Glatzl, T.; Beigelbeck, R.; Cerimovic, S.; Steiner, H.; Treytl, A. (2018). Finite Element Method Simulation and Characterization of a Thermal Flow Sensor Based on Printed Circuit Board Technology for Various Fluids. mdpi proceedings, Vol. 2: 833

Sauter, T.; Treytl, A.; Diwold, K.,; Molnar, D.; Lechner, D.; Krammer, L.; Derler, B.; Seidl, C.; Wenig, F. (2018). Getting Fit for the Future: Optimizing Energy Usage in Existing Buildings by Adding Non-Invasive Sensor Networks. IEEE, proceedings ISIE 2018: 963-968, IEEE, Cairns

Cerimovic, S.; Treytl, A.; Glatzl, G.; Beigelbeck, R.; Keplinger, F.; Sauter, T. (2018). Thermal Flow Sensor for Non-Invasive Measurements in HVAC Systems. Eurosensors, Proceedings 2018, 2(13): 827, Eurosensors 2018, Graz

Glatzl, T.; Cerimovic, S.; Treytl, A. (2017). Thermal Flow Sensor Based on Printed Circuit Board Technology for Aqueous Media. Yurish, S.S., Proceedings of the 3rd International Conference on Sensors and Electronic Instrumentation Advances: 232-236, IFSA Publishing

Krammer, L.; Diwold, K.; Lechner, D.; Treytl, A.; Cerimovic, S.; Derler, B.; Seidl, C.; Wenig, F. (2017). Large-scale Energy Optimization of Buildings based on non-invasive Sensors. Department Energie-Umweltmanagement, FH Burgenland, Science.Research.Pannonia, Band 21, Zukunft der Gebäude: 99-108, leykamverlag

Wenig, F.; Heschl, C.; Glatzl, T.; Sauter, T. (2017). Numerical and experimental characterization of a novel low-cost thermal air flow sensor. IEEE, IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society: 3633-3637

Lectures

Towards non-invasive Temperature Measurements in HVAC - A Characterization and Correction Approach

IEEE 28th International Symposium on Industrial Electronics (ISIE 2019), Vancouver, Kanada, 13/06/2019

Finite Element Method Simulation and Characterization of a Thermal Flow Sensor Based on Printed Circuit Board Technology for Various Fluids

Eurosensors 2018, Graz, Österreich, 10/09/2018

Thermal Flow Sensor for Non-Invasive Measurements in HVAC Systems

Eurosensors 2018 Conference, Graz, Austria, 10/09/2018

Thermal flow sensor for non-invasive measurements in HVAC systems

Eurosensors 2018 Conference, Graz, Austria, 9–12 September 2018, 10/09/2018

Smart Printed and Noninvasive Thermal Sensors for HVAC Monitoring

Guest Lecture, Aalto University, Finnland, 26/04/2018

Large-scale Energy Optimization of Buildings based on non-invasive Sensors

Konferenz e-nova 2017 in Pinkafeld, 24/11/2017

Numerical and experimental characterization of a novel low-cost thermal air flow sensor

IECON 2017 - 43rd Annual Conference of the IEEE Industrial Electronics Society, Peking, 02/11/2017

Thermal Flow Sensor Based on Printed Circuit Board Technology for Aqueous Media

Konferenz SEIA 2017 in Moskau, 21/09/2017

Citrate anticoagulation and activation of the complement system.

ESAO 2006, Umea, Sweden, 24/06/2006

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