Evaluation of the plastic deformation behavior of modified 100Cr6 steels with increased fractions of retained austenite using cyclic indentation tests
Author:
Ostermayer Pascal1ORCID, Burkart Klaus2, Blinn Bastian1, Surm Holger2, Clausen Brigitte2, Beck Tilmann1
Affiliation:
1. Institute of Materials Science and Engineering , TU Kaiserslautern , Gottlieb-Daimler Str. 44, 67663 Kaiserslautern , Rhineland-Palatinate , Germany 2. Mechanical Properties , Leibniz-Institut für Werkstofforientierte Technologien – IWT , Badgasteiner Str. 3, 28359 Bremen , Germany
Abstract
Abstract
In highly loaded components, such as roller bearings, early failures may occur due to microstructural defects. Thus, a higher defect tolerance of the material can improve the fatigue lifetime. To produce steels with high defect tolerance, innovative alloying concepts, and a sound knowledge of the influence of heat treatment parameters on the resultant mechanical properties is indispensable. Consequently, two bearing steels based on 100Cr6 with different silicon contents were investigated to achieve relatively high retained austenite (RA) fractions, which are assumed to increase the defect tolerance at cyclic loading. To understand the relation between bainitic heat treatment and mechanical characteristics, the resultant RA fractions, Vickers hardness, microhardness, and cyclic hardening exponent CHT eII, which correlates to defect tolerance of metallic materials, were determined for differently heat-treated conditions. Based on the statistical design of experiments and measurements obtained with X-ray diffraction and cyclic indentation testing, regression calculations were conducted. Pertaining to the results of the regression analyses, the heat treatment parameterizations of these steels were specifically determined for certain desired property combinations within the boundaries investigated. Therefore, the temperatures used in the austenitizing and bainitizing procedures have shown the highest influence on the mechanical characteristics and the RA fraction of both steels.
Funder
Deutsche Forschungsgemeinschaft
Publisher
Walter de Gruyter GmbH
Subject
Mechanical Engineering,Mechanics of Materials,General Materials Science
Reference26 articles.
1. DIN e.V., Ed., Heat-treated Steels, Alloy Steels and Free-Cutting Steels – Part 17: Ball and Roller Bearing Steels, 683–17, Berlin, Beuth Verlag GmbH, 2015. 2. H. Bhadeshia, “Steels for bearings,” Prog. Mater. Sci., vol. 57, no. 2, pp. 268–435, 2012, https://doi.org/10.1016/j.pmatsci.2011.06.002. 3. B. Clausen, T. Karsch, and H.-W. Zoch, “High-performance bearing steels: a new approach in alloy development,” in Bearing Steel Technologies: 11th Volume, Advances in Steel Technologies for Rolling Bearings, J. Beswick, Ed., West Conshohocken, PA, ASTM International, 2017, pp. 343–365. 4. F. Gutiérrez Guzmán, M. Oezel, G. Jacobs, G. Burghardt, C. Broeckmann, and T. Janitzky, “Reproduction of white etching cracks under rolling contact loading on thrust bearing and two-disc test rigs,” Wear, vols. 390–391, pp. 23–32, 2017, https://doi.org/10.1016/j.wear.2017.06.020. 5. S.-X. Li, Y.-S. Su, X.-D. Shu, and J.-J. Chen, “Microstructural evolution in bearing steel under rolling contact fatigue,” Wear, vols. 380–381, pp. 146–153, 2017, https://doi.org/10.1016/j.wear.2017.03.018.
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