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BY 4.0 license Open Access Published by De Gruyter September 26, 2018

Analytical strength assessments of austempered ductile iron components

Dedicated to Professor Dr.-Ing. Harald Zenner on the occasion of his eightieth birthday

Rechnerischer Festigkeitsnachweis von ADI Gussbauteilen
Torben Engelke and Alfons Esderts
From the journal Materials Testing

Abstract

Austempered ductile iron (ADI) is a heat-treated ductile iron with improved tensile strength and toughness. Therefore, ADI is an interesting material for the construction of technical parts. However, for practical use, a strength assessment is necessary. An often-used option for an analytical strength assessment is the FKM-guideline. This guideline includes the strength assessment for steel, cast iron and aluminum materials, but it has not yet been especially investigated for ADI. In this work the use of the guideline for ADI is investigated. On the basis of experimental data, the accuracy of the guideline is examined and the limitations are discussed. Furthermore, the parameters that are used for the calculation in the guideline can be adjusted for the improvement of the accuracy of the strength assessment. In this way in particular, the forecast for shear stresses and the high strength materials can be improved.

Kurzfassung

Austempered Ductile Iron (ADI) ist ein wärmebehandeltes Gusseisen mit Kugelgraphit, dessen Festigkeits- und Dehnungseigenschaften gesteigert sind. Damit wird es interessant für technische Anwendungen. Für den praktischen Einsatz von Bauteilen aus ADI ist jedoch ein Festigkeitsnachweis erforderlich. Die FKM-Richtlinie stellt eine Möglichkeit zur Erbringung eines rechnerischen Festigkeitsnachweises dar. Die Richtlinie enthält den Nachweis für Bauteile aus Stahl, Eisenguss und Aluminiumwerkstoffen. Die Anwendung auf ADI Bauteile ist jedoch noch nicht untersucht. In dieser Arbeit wird auf der Basis von experimentellen Versuchsdaten die Anwendbarkeit der Richtlinie und ihre Grenzen untersucht. Weiterhin werden die für die Berechnung genutzten Parameter angepasst, um die Treffsicherheit der Richtlinie zu erhöhen. Dadurch können insbesondere hochfeste ADI Werkstoffe und Schub beanspruchte Bauteile besser bewertet werden.


*Correspondence Address, Torben Engelke, Institute for Plant Engineering and, Fatigue Analysis (IMAB), Clausthal University of Technology (TUC), Leibnizstraße 32, 38678 Clausthal-Zellerfeld, Germany, E-mail:

Torben Engelke, born in 1988, studied Mechanical Engineering at Clausthal University of Technology (TUC), Germany and has been working as a scientist at the Institute for Plant Engineering and Fatigue Analysis (IMAB) of TUC since 2013.

Professor Dr.-Ing. Alfons Esderts, born in 1963, studied Mechanical Engineering at TUC and finished his PhD thesis in 1995. Between 1995 and 2003, he was the Head of the “Fatigue Analysis” Department for the Deutsche Bahn AG in Minden, Germany. Since 2003, he has been a Professor at TUC and is Head of the Institute for Plant Engineering and Fatigue Analysis (IMAB). In addition, he has been Vice President for Research and Technology Transfer at TUC in Clausthal, Germany since 2015.


References

1 R.Rennert, E.Kullig, M.Vormwald, A.Esderts, D.Siegele: Rechnerischer Festigkeitsnachweis für Maschinenbauteile, 6th Ed., FKM, Frankfurt, Germany (2012)Search in Google Scholar

2 O.Khalil: Investigations of the Fatigue Strength and Metallurgy of Austempered Ductile Iron, Dipl.-Ing. Thesis, TU-Clausthal, Clausthal-Zellerfeld, Germany (2005) (in German)Search in Google Scholar

3 C.Lin, W.Lee: Effects of highly stressed volume on fatigue strength of austempered ductile irons, International Journal of Fatigue20 (1998), No. 4, pp. 30130710.1016/S0142-1123(97)00134-5Search in Google Scholar

4 M.Wohlfahrt, P.Kainzinger, S.Redik, W.Eichlseder: Microstructural influence on the local fatigue strength of various cast materials and prediction by means of solidification simulation, Giesserei-Rundschau58 (2011), No. 9–10, pp. 216223 (in German)Search in Google Scholar

5 W.Schäfer, E.Hepp, J.Sturm, A.Heinrietz, W.Böhme, J.Heckmann, U.Petzschmann, B.Pustal, H.Siebert, A.Stich, H.Müller, S.Schmidt: LEA – Lightweight construction with cast ADI components, Bonn, Germany (2011) (in German)Search in Google Scholar

6 C.Lin, P.Lai, T.Shih: Influence of microstructure on fatigue properties of austempered ductile irons – I. High-cycle fatigue, Int. J. Fatigue18 (1996), No. 5, pp. 29730710.1016/0142-1123(96)82895-7Search in Google Scholar

7 K.Hanzlíková, S.Vechet, J.Kohout: The relation between microstructure composition and fatigue properties of ADI, Komunikácie/Comunications, 4/200610.26552/com.C.2006.4.47-50Search in Google Scholar

8 S.Vechet, J.Kohout, K.Hanlikova, H.Vojtech: Fatigue Behaviour of Nodular Cast Iron at Various Loading Cycle Asymmetry, Komunikacie/Communications – Scientific Letters of the University of Zilina4 (2006)10.26552/com.C.2006.4.42-46Search in Google Scholar

9 G. M. J.Gilbert: Engineering data for austempered ductile irons (ADI) – interim data sheets for three tentative grades, BCIRA Journal34 (1986), pp. 203232Search in Google Scholar

10 M.Bauer: Bending behavior of cast iron with spheroidal graphite – Effects of cast skin – Structural and quality characteristics, Giesserei-Rundschau52 (2005), No. 1–2, pp. 1828 (in German)Search in Google Scholar

11 DIN EN 1565: 2012-01: Gießereiwesen – Ausferritic Cast Iron with Nodular Graphite, Beuth, Berlin, Germany (2012) (in German)Search in Google Scholar

12 A.Diemar, R.Thumser, J.Bergmann: Statistical influence of size and component strength, Materialprufung/Materials Testing46 (2004), pp. 162110.3139/120.100559, (in German)Search in Google Scholar

13 T.Engelke, A.Esderts: Fatigue Strength Analysis of ADI Components, Investigation of ADI Components on their Fatigue Strength at Different Stress Ratios, FVA Heft 1279, Frankfurt, Germany (2018) (in German)Search in Google Scholar

14 T.Engelke, A.Esderts: Analytical Strength Assessmant of ADI Components, Proc. of the DVM Tagung Neue Entwicklungen für die Bauteilfestigkeitsnachweise, DVM, Berlin, Germany (2018) (in German)Search in Google Scholar

15 J.Liu: Contribution to the Improvement of the Fatigue Strength Calculation with Multiaxial Stress, Dr.-Ing. Thesis, TU Clausthal, Clausthal-Zellerfeld, Germany (1991) (in German)Search in Google Scholar

Published Online: 2018-09-26
Published in Print: 2018-10-27

© 2018, Carl Hanser Verlag, München

This work is licensed under the Creative Commons Attribution 4.0 International License.

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