Quantification of forming-induced damage in case-hardening steel AISI 5115 by advanced SEM methods
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L. A. Lingnau
Lars Andree Lingnau works as Scientific Assistant at the Chair of Materials Test Engineering (WPT) of the TU Dortmund University since May 2022. Besides the investigation of the influence of forming-induced ductile damage on the fatigue properties he is concerned with microstructural characterization by means of in situ investigations inside the SEM.
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J. Heermant
Johannes Heermant works as Student Assistant at the Chair of Materials Test Engineering (WPT) of the TU Dortmund University since July 2022. In the course of this investigation he was responsible for the image segmentation and 3D reconstruction of the 3D void and manganese sulfide distributions.
Abstract
As climate change and resource scarcity intensify, the need for energy efficiency, emissions reduction, and resource conservation grows. Forming technology offers significant potential for light weighting, cost and resource efficiency. However, current component design often neglects forming-related damage, such as voids, focusing primarily on mechanical properties and safety factors. Integrating knowledge of these voids into the design process can improve efficiency and increase light weighting potential. Advanced scanning electron methods, such as electron contrast channeling imaging, evaluated forming-induced damage and correlated it with fatigue properties. Crack initiation occurred mainly near manganese sulfide inclusions or near-surface voids, influencing crack propagation. Analyzing void distribution using advanced secondary electron methods enabled the development of a 3D volume model.
Kurzfassung
Vor dem Hintergrund des sich intensivierenden Klimawandels und der sich verschärfenden Ressourcenknappheit gewinnen Energieeffizienz, Emissionsminderung und Ressourcenschonung immer mehr an Bedeutung. Die Umformungstechnik bietet erhebliches Potenzial für Gewichtsreduzierung, Kosteneinsparung und Ressourceneffizienz. Beim aktuellen Bauteildesign werden umforminduzierte Schädigungen wie Poren allerdings häufig außer Acht gelassen und der Schwerpunkt auf die mechanischen Eigenschaften und Sicherheitsfaktoren gelegt. Wird das Wissen um diese Poren beim Bauteildesign genutzt, können so die Effizienz gesteigert und das Potenzial für Gewichtseinsparungen erhöht werden. Mit auf Sekundärelektronen beruhenden Techniken wie dem Electron Contrast Channeling wurden umformungsinduzierte Schädigungen beurteilt und mit Ermüdungseigenschaften korreliert. Risse bildeten sich hauptsächlich in der Nähe von Mangansulfideinschlüssen oder oberflächennahen Poren, die die Rissausbreitung beeinflussten. Auf Grundlage der Analyse der Porenverteilung mithilfe fortschrittlicher, auf Sekundärelektronen basierender Techniken konnte ein 3D-Volumenmodell entwickelt werden.
About the authors
Lars Andree Lingnau works as Scientific Assistant at the Chair of Materials Test Engineering (WPT) of the TU Dortmund University since May 2022. Besides the investigation of the influence of forming-induced ductile damage on the fatigue properties he is concerned with microstructural characterization by means of in situ investigations inside the SEM.
Johannes Heermant works as Student Assistant at the Chair of Materials Test Engineering (WPT) of the TU Dortmund University since July 2022. In the course of this investigation he was responsible for the image segmentation and 3D reconstruction of the 3D void and manganese sulfide distributions.
5 Acknowledgments
The authors gratefully acknowledge the funding by the German Research Foundation (Deutsche Forschungsgemeinschaft, DFG) for the subprojects C01 and B01 within the Collaborative Research Center CRC/Transregio 188 “Damage-controlled forming processes" (project no. 278868966). The authors further thank the DFG and the Ministry of Culture and Science of North Rhine-Westphalia (Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen, NRW) for their financial support within the Major Research Instrumentation Program for the FIB-SEM (project no. 386509496).
5 Danksagung
Die Autoren danken der Deutschen Forschungsgemeinschaft (DFG) für die Förderung der Teilprojekte C01 und B01 im Sonderforschungsbereich SFB/Transregio 188 „Schädigungskontrollierte Umformprozesse“ (Projektnummer 278868966). Die Autoren danken außerdem der DFG und dem Ministerium für Kultur und Wissenschaft des Landes Nordrhein-Westfalen (NRW) für ihre finanzielle Unterstützung im Rahmen des Forschungsgroßgeräteprogramms für das FIB-REM (Projektnummer 386509496).
References / Literatur
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© 2024 Walter de Gruyter GmbH, Berlin/Boston, Germany
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- Enhancing precision and safety in metallographic sample preparation: Reduce the stochasticity and workload with robotization
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- Examinations on small bronze items from the Hallstatt period burial ground at Mitterkirchen in Upper Austria
- In situ stereomicroscopy chemical and color etching
- Quantification of forming-induced damage in case-hardening steel AISI 5115 by advanced SEM methods
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- Titanium alloys with a high β stabilizer content – sample preparation strategies and micrographs
- Microstructural changes in the welding of titanium-stabilized steels
- Development of a preparation method for Bronze Age flanged axes
- Challenges and possibilities of the manual metallographic serial sectioning process using the example of a quantitative microstructural analysis of graphite in cast iron
- Effects of heat treatment on the microstructure and corrosion behavior of manganese aluminum bronzes
- Utilizing nano-computed tomography to characterize the structural nature of industrial minerals
- Use of mobile metallography to assess the extent of damage to high temperature components in power plants
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
Articles in the same Issue
- Inhalt
- Editorial
- Editorial
- Metallography of tailings from the Mansfeld copper mining area
- Enhancing precision and safety in metallographic sample preparation: Reduce the stochasticity and workload with robotization
- Electropolishing study of metastable austenitic steel AISI 347 for EBSD analyses
- Examinations on small bronze items from the Hallstatt period burial ground at Mitterkirchen in Upper Austria
- In situ stereomicroscopy chemical and color etching
- Quantification of forming-induced damage in case-hardening steel AISI 5115 by advanced SEM methods
- Microstructures of iron meteorites
- Old Woman Meteorite: microstructures, analyses, and stories
- Titanium alloys with a high β stabilizer content – sample preparation strategies and micrographs
- Microstructural changes in the welding of titanium-stabilized steels
- Development of a preparation method for Bronze Age flanged axes
- Challenges and possibilities of the manual metallographic serial sectioning process using the example of a quantitative microstructural analysis of graphite in cast iron
- Effects of heat treatment on the microstructure and corrosion behavior of manganese aluminum bronzes
- Utilizing nano-computed tomography to characterize the structural nature of industrial minerals
- Use of mobile metallography to assess the extent of damage to high temperature components in power plants
- Picture of the Month
- Picture of the Month
- News
- News
- Meeting Diary
- Meeting Diary
