Modellbasierte Korrelation zwischen dem elektrischen Widerstand und der Versetzungsstruktur des ermüdungsbeanspruchten ICE-Radstahls R7
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Peter Starke
and Frank Walther
Kurzfassung
Eine gewichtsoptimierte Bauteilauslegung und ausfallsichere Abschätzung der Lebensdauer metallischer Werkstoffe sowie Bauteile setzen ein umfassendes Verständnis der Ermüdungsvorgänge und eine systematische Untersuchung des Ermüdungsverhaltens voraus. Dies wird umso bedeutender, wenn es um die Auslegung hochbeanspruchter komplexer Bauteilgeometrien geht, wie sie im Rad-Schiene-System im Hochgeschwindigkeitspersonenverkehr eingesetzt werden. Zur Charakterisierung des Ermüdungsverhaltens und der strukturmechanischen Prozesse werden üblicherweise mechanische Spannungs-Dehnungs-Hysteresis-Messungen, aber zunehmend auch verschiedene Arten von Temperatur- und elektrischen Widerstandsmessungen eingesetzt. Insbesondere die elektrische Widerstandsmessung führt zu einem wesentlichen Informationsgewinn, da bereits mikrostrukturelle Veränderungen detektiert werden können, die z. B. auf Veränderungen der Versetzungsdichte und -struktur beruhen. Zudem können diese resistiven Messverfahren auch in Einstufenversuchen mit lastfreien Unterbrechungen und in Betriebslastversuchen zur Charakterisierung des Schädigungsverlaufs herangezogen werden. Im Rahmen dieses Artikels wurden für den ICE-Vollradstahl R7 Kennwerte der (spezifischen) elektrischen Widerstandsänderung ermittelt und beanspruchungs- bzw. lastspielzahlabhängig mit der Veränderung der röntgenografisch ermittelten Versetzungsdichte korreliert.
Abstract
A weight-optimized component design and a precise estimation of the fatigue life or even the remaining service life for metallic materials and components requires a comprehensive understanding of fatigue mechanisms as well as the systematic investigation of the fatigue behaviour. This becomes even more relevant in the case of complex and highly loaded geometries of components which are used e. g. in rail/wheel systems of high-speed passenger transport applications. To characterize the fatigue behaviour and the structure-mechanical processes, usually mechanical stress-strain hysteresis and recently various types of temperature and electrical resistance measurements are applied. In particular, electrical resistance measurements gain in information by measuring microstructural changes which are related to changes in dislocation density and structure. In addition, resistive measurement techniques can be applied in constant amplitude tests interrupted by load-free sequences and also in service load tests for the characterization of damage evolution processes. The research work presented in this paper is focused on the load- and cycle-dependent correlation of (specific) electrical resistance values with dislocation density measurements for the ICE-railway wheel steel R7.
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© 2015, Carl Hanser Verlag, München
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- A simple procedure for estimating SN-lines for crack initiation from SN-lines for total failure*
- Modellbasierte Korrelation zwischen dem elektrischen Widerstand und der Versetzungsstruktur des ermüdungsbeanspruchten ICE-Radstahls R7
- Effect of cobalt on the aging kinetics and the properties of a CuCoNiBe alloy
- Effect of heat treatment on microstructure and mechanical properties of Fe-5Cr-1.4B alloy
- Interface characterization of friction welded low carbon steel and copper alloys
- Field test methods for aluminum gas cylinders
- Application of the Taguchi method for parameter optimization of the surface grinding process
- A discrete dislocation technique for fatigue microcracks (Part I)
- A discrete dislocation technique for fatigue microcracks (Part II)
- Synchrotron X-ray CT of rose peduncles – evaluation of tissue damage by radiation*
- Surface roughness analysis and optimization for the CNC milling process by the desirability function combined with the response surface methodology
- Design, manufacture and analysis of composite epoxy material with embedded silicon carbide (SiC) and alumina (Al2O3) nanoparticles/fibers
- Performance of organic and inorganic substances as inhibitors for chloride-induced corrosion in concrete
- Fillet welding of austenitic stainless steel using the double channel shielding gas method with cored wire
- Applying quadraphonic transmission ultrasonic defectoscopy on standard aluminum materials
- Kalender/Calendar
- Kalender
Articles in the same Issue
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- A simple procedure for estimating SN-lines for crack initiation from SN-lines for total failure*
- Modellbasierte Korrelation zwischen dem elektrischen Widerstand und der Versetzungsstruktur des ermüdungsbeanspruchten ICE-Radstahls R7
- Effect of cobalt on the aging kinetics and the properties of a CuCoNiBe alloy
- Effect of heat treatment on microstructure and mechanical properties of Fe-5Cr-1.4B alloy
- Interface characterization of friction welded low carbon steel and copper alloys
- Field test methods for aluminum gas cylinders
- Application of the Taguchi method for parameter optimization of the surface grinding process
- A discrete dislocation technique for fatigue microcracks (Part I)
- A discrete dislocation technique for fatigue microcracks (Part II)
- Synchrotron X-ray CT of rose peduncles – evaluation of tissue damage by radiation*
- Surface roughness analysis and optimization for the CNC milling process by the desirability function combined with the response surface methodology
- Design, manufacture and analysis of composite epoxy material with embedded silicon carbide (SiC) and alumina (Al2O3) nanoparticles/fibers
- Performance of organic and inorganic substances as inhibitors for chloride-induced corrosion in concrete
- Fillet welding of austenitic stainless steel using the double channel shielding gas method with cored wire
- Applying quadraphonic transmission ultrasonic defectoscopy on standard aluminum materials
- Kalender/Calendar
- Kalender