Calculation of S-N Curves for Different Mean Stresses on the Basis of “PHYBALmean” for the Quenched and Tempered Steel SAE 4140

Peter Starke; Dietmar Eifler

doi:10.3139/120.110398

Artikel

Calculation of S-N Curves for Different Mean Stresses on the Basis of “PHYBAL_mean” for the Quenched and Tempered Steel SAE 4140

Peter Starke und Dietmar Eifler

Veröffentlicht/Copyright: 26. Mai 2013

Veröffentlicht von

Veröffentlichen auch Sie bei De Gruyter Brill

Manuskript einreichen Informationen für Autor*innen

Aus der Zeitschrift Materials Testing Band 55 Heft 1

Abstract

Recently, a couple of methods for the physically based fatigue life calculation of metallic materials were developed at the Institute of Materials Science and Engineering at the University of Kaiserslautern. The focus of these “PHYBAL”-methods is the reduction of the necessary experiments in comparison to the conventional determination of fatigue data. The application of the “PHYBAL”-method requires a limited number of high-precision fatigue experiments. In addition to conventional mechanical stress-strain hysteresis measurements temperature and electrical resistance measurements have to be carried out to characterize the cyclic deformation behaviour. So far the “PHYBAL”-versions “PHYBAL_W” (σW = endurance limit), “PHYBAL_LIT ” (LIT = load increase test), “PHYBAL_SB ” (SB = scatter bands) and “PHYBAL_mean ” (mean = mean stress) are available and were successfully applied on different unalloyed carbon steels as well as austenitic steels, cast irons and light alloy metals.

Kurzfassung

In den letzten Jahren wurden am Lehrstuhl für Werkstoffkunde der TU Kaiserslautern eine Reihe von Methoden zur physikalisch basierten Lebensdauerberechnung entwickelt. Das Ziel dieser “PHYBAL“-Methoden ist die Reduktion der Anzahl von Ermüdungsversuchen gegenüber der konventionellen Ermittlung von Ermüdungsdaten. Die Anwendung der “PHYBAL“-Methoden erfordert nur einen geringen Umfang an Ermüdungsexperimenten. Zusätzlich zu konventionellen mechanischen Spannung-Dehnung-Hysteresismessungen wurden Temperatur und elektrische Widerstandsmessverfahren zur Charakterisierung des Ermüdungsverhaltens eingesetzt. Derzeit werden die folgenden “PHYBAL”-Versionen erfolgreich an unlegierten und austenitischen Stählen, Gusseisenwerkstoffen und Leichtmetalllegierungen eingesetzt: “PHYBAL_W” (σ_W = endurance limit, Dauerfestigkeit), “PHYBAL_LIT” (LIT = load increase test, Laststeigerungsversuch), “PHYBAL_SB” (SB = scatter bands, Streuband) und “PHYBAL_mean” (mean = mean stress, Mittelspannung).

Dr. Peter Starke, born in 1977, studied mechanical engineering at the University of Kaiserslautern. Since 2002 he has been scientific assistant at the Institute of Materials Science and Engineering at the University of Kaiserslautern, Germany. He received his PhD in 2007 working on “The fatigue life calculation of metallic materials under constant amplitude loading and service loading”. His research is mainly focused on the characterization of the fatigue behaviour of cast irons and high strength steel as well as the fatigue life calculation of metallic materials on the basis of physical quantities in the LCF-, HCF- and VHCF-regime.

Prof. Dietmar Eifler, born in 1949, studied mechanical engineering, received his PhD in 1981 working on “The cyclic deformation behaviour of quenched and tempered steels” and received his postdoctoral lecture qualification (habilitation) in 1991 working on “The influence of elevated temperatures and mean stresses on the cyclic deformation behaviour of steels” at the University of Karlsruhe, Germany. From 1991 to 1994 he was professor at the University of Essen, Germany. Since 1994 he has been professor at the Institute of Materials Science and Engineering at the University of Kaiserslautern. His research is mainly focused on the cyclic deformation behaviour of metallic materials in the LCF-, HCF- and VHCF-regime, furthermore medical implant materials and innovative joining techniques like ultrasonic welding and friction stir welding.

References

1 R. W.Landgraf, J.Morrow, T.Endo: Determination of the Cyclic Stress-Strain Curve, J. Mater.4 (1969), pp. 176–188Suche in Google Scholar

2 P.Lukáš, M.Klesnil: Cyclic stress-strain response and fatigue life in metals in low amplitude region, Mater Sci. Eng.11 (1973), pp. 345–356Suche in Google Scholar

3 D.Dengel, H.Harig: Estimation of the fatigue limit by progressively increasing load tests, Fatigue Fract. Eng. Mat.3 (1980), pp. 113–128Suche in Google Scholar

4 J.Polák: Electrical resistivity of cyclically deformed copper, Czech. J. Phys. B.19 (1969), pp. 315–32210.1007/BF01712868Suche in Google Scholar

5 G.La Rosa, A.Risitano: Thermographic methodology for rapid determination of the fatigue limit of materials and mechanical components, Int. J. Fatigue22 (2000), pp. 65–73Suche in Google Scholar

6 G.Meneghetti: Analysis of the fatigue strength of a stainless steel based on the energy dissipation, Int. J. Fatigue29 (2007), pp. 81–9410.1016/j.ijfatigue.2006.02.043Suche in Google Scholar

7 F.Walther, D.Eifler: Cyclic deformation behaviour of steels and light-metal alloys, Mat. Sci. Eng. A468–470 (2007), pp. 259–266Suche in Google Scholar

8 P.Starke, D.Eifler: Fatigue assessment and fatigue life calculation of metals on the basis of mechanical hysteresis, temperature, and resistance data, Materials Testing51 (2009), No. 5, pp. 261–268Suche in Google Scholar

9 P.Starke, F.Walther, D.Eifler: New fatigue life calculation method for quenched and tempered steel SAE 4140, Mat. Sci. Eng. A523 (2009), No. 1–2, pp. 246–252Suche in Google Scholar

10 M.Smaga, F.Walther, D.Eifler: Deformation-induced martensitic transformation in metastable austenitic steels, Mat. Sci. Eng. A483–484 (2008), pp. 394–397Suche in Google Scholar

11 J. D.Morrow: Cyclic plastic strain energy and fatigue of metals, ASTM-Internal Friction, Damping and Cyclic Plasticity STP378 (1964), pp. 45–8710.1520/STP43764SSuche in Google Scholar

Published Online: 2013-05-26

Published in Print: 2013-01-01

Sie haben derzeit keinen Zugang zu diesem Inhalt.

Artikel in diesem Heft

https://doi.org/10.3139/120.110398