SteBLife, a New Approach for the Accelerated Generation of Metallic Materials’ Fatigue Data

Ruth Acosta; Haoran Wu; Ramanan Sridaran Venkat; Fabian Weber; Jochen Tenkamp; Frank Walther; Peter Starke

doi:10.3390/met10060798

Metals (Jun 2020)

SteBLife, a New Approach for the Accelerated Generation of Metallic Materials’ Fatigue Data

Ruth Acosta,
Haoran Wu,
Ramanan Sridaran Venkat,
Fabian Weber,
Jochen Tenkamp,
Frank Walther,
Peter Starke

Affiliations

Ruth Acosta: Department of Materials Science and Materials Testing (WWHK), University of Applied Sciences Kaiserslautern, Schoenstraße 11, D-67659 Kaiserslautern, Germany
Haoran Wu: Department of Materials Science and Materials Testing (WWHK), University of Applied Sciences Kaiserslautern, Schoenstraße 11, D-67659 Kaiserslautern, Germany
Ramanan Sridaran Venkat: Chair of Nondestructive Testing and Quality Assurance (LZfPQ), Saarland University, Am Markt 4., D-66125 Saarbrücken, Germany
Fabian Weber: Chair of Nondestructive Testing and Quality Assurance (LZfPQ), Saarland University, Am Markt 4., D-66125 Saarbrücken, Germany
Jochen Tenkamp: Department of Materials Test Engineering (WPT), TU Dortmund University, Baroper Str. 303, D-44227 Dortmund, Germany
Frank Walther: Department of Materials Test Engineering (WPT), TU Dortmund University, Baroper Str. 303, D-44227 Dortmund, Germany
Peter Starke: Department of Materials Science and Materials Testing (WWHK), University of Applied Sciences Kaiserslautern, Schoenstraße 11, D-67659 Kaiserslautern, Germany

DOI: https://doi.org/10.3390/met10060798
Journal volume & issue: Vol. 10, no. 6
p. 798

Abstract

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The service life of materials and components exposed to repeated mechanical loads is limited, which is why the understanding of the damage evolution and estimating its fatigue life is of high importance for its technical application. This paper shows how temperature and magnetic field measurement methods can be used to describe the cyclic deformation behaviour of metallic materials and to derive parameters from this, which are used in short-term methods to calculate the fatigue life. Within the SteBLife (stepped-bar fatigue life) approach, only three to five fatigue tests with a stepped fatigue specimen are required to determine a complete S–N or Woehler curve with scatter bands for different failure probabilities. If only a trend S–N curve is required, the number of tests can be reduced to a single fatigue test only. In the framework of this paper, these approaches will be presented for normalised SAE 1045 (C45E) and quenched and tempered SAE 4140 (42CrMo4) steels.

Published in Metals

ISSN: 2075-4701 (Online)
Publisher: MDPI AG
Country of publisher: Switzerland
LCC subjects: Technology: Mining engineering. Metallurgy
Website: http://www.mdpi.com/journal/metals

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