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Fatigue strength evaluation of case-hardened components combining heat treatment simulation and probabilistic approaches
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  • Valérian Iss,
  • Jean-André Meis,
  • Ali Rajaei,
  • Bengt Hallstedt,
  • Christoph Broeckmann
Valérian Iss
Rheinisch Westfalische Technische Hochschule Aachen Institut fur Werkstoffanwendungen im Maschinenbau

Corresponding Author:[email protected]

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Jean-André Meis
Flender GmbH
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Ali Rajaei
Rheinisch Westfalische Technische Hochschule Aachen Institut fur Werkstoffanwendungen im Maschinenbau
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Bengt Hallstedt
Rheinisch Westfalische Technische Hochschule Aachen Institut fur Werkstoffanwendungen im Maschinenbau
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Christoph Broeckmann
Rheinisch Westfalische Technische Hochschule Aachen Institut fur Werkstoffanwendungen im Maschinenbau
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Abstract

In order to raise the hardness and strength of the surface layer of mechanical components and induce favourable residual compressive stresses, case-hardening procedures have become established in the heat treatment of steel. In this work, a calculation concept for the fatigue strength of components that have been case-hardened through carburizing heat-treatment is being developed. The residual stress and the load stresses in complex-shaped, carburized materials are determined using a finite element (FE) model. The fatigue limit of the components is derived using probabilistic methods and taking into account hardness gradients, residual stresses, and non-metallic inclusions. The model is validated with available axial bending fatigue test data and then used to predict the rotating bending fatigue limit of samples with various geometries and heat-treatment conditions. This work demonstrates the capability of combining probabilistic and FE-based modelling to represent complex interactions between variables that affect the fatigue of heat-treated components, such as steel cleanliness, notch shape, case-hardening depth, or loading conditions.
06 Jul 2023Submitted to Fatigue & Fracture of Engineering Materials & Structures
06 Jul 2023Submission Checks Completed
06 Jul 2023Assigned to Editor
10 Jul 2023Reviewer(s) Assigned
15 Aug 2023Review(s) Completed, Editorial Evaluation Pending
26 Aug 2023Editorial Decision: Revise Major
13 Sep 20231st Revision Received
13 Sep 2023Submission Checks Completed
13 Sep 2023Assigned to Editor
14 Sep 2023Reviewer(s) Assigned
16 Oct 2023Review(s) Completed, Editorial Evaluation Pending
23 Oct 2023Editorial Decision: Revise Minor
28 Oct 20232nd Revision Received
28 Oct 2023Submission Checks Completed
28 Oct 2023Assigned to Editor
04 Nov 2023Reviewer(s) Assigned
18 Nov 2023Review(s) Completed, Editorial Evaluation Pending
19 Nov 2023Editorial Decision: Accept