Micromagnetic-Based Fatigue Life Prediction of Single-Lip Deep Drilled AISI 4140

  • N. BaakEmail author
  • J. Nickel
  • D. Biermann
  • F. Walther
Conference paper
Part of the Structural Integrity book series (STIN, volume 7)


Non-destructive testing based on micromagnetic techniques, for example magnetic Barkhausen noise analysis, are quick and reliable possibilities to detect and classify material parameters like hardness and residual stresses. High-strength steels, like AISI 4140 (42CrMo4 + QT), are commonly used for highly dynamically loaded parts. Increasing requirements on weight, performance and efficiency of automotive industry claim increasing demands on material properties. The aim of this study is to evaluate the surface conditions of deep drilled round specimens due to drilling parameters and to predict the resulting fatigue strength by micromagnetic measurements. Furthermore, modified process parameters should enhance fatigue life without the need for expensive processing steps, e.g. autofrettage.


Micromagnetic technique Barkhausen noise Fatigue performance Surface condition Single-lip deep hole drilling 



The authors would like to thank the German Research Foundation (DFG) for financial support within the research project “Investigations on the influence of machining and sulphur content on the fatigue strength of the quenched and tempered steel 42CrMo4 + QT” (WA 1672/22, BI 493/83).


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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.Department of Materials Test Engineering (WPT)TU Dortmund UniversityDortmundGermany
  2. 2.Institute of Machining Technology (ISF)TU Dortmund UniversityDortmundGermany

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