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Metals
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Fatigue Life Calculation Approaches for Metallic Materials
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Fatigue Life Calculation Approaches for Metallic Materials

A special issue of Metals (ISSN 2075-4701). This special issue belongs to the section "Metal Failure Analysis".

Deadline for manuscript submissions: closed (31 August 2021) | Viewed by 8363

Special Issue Editors

Prof. Dr. Peter Starke

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Guest Editor
Department of Materials Science and Materials Testing, University of Applied Sciences Kaiserslautern, 67659 Kaiserslautern, Germany
Interests: fatigue behavior: low to very high cycle fatigue (LCF-VHCF), characterization of the cyclic deformation behavior by using physical quantities, fatigue life calculation, manufacturing and service influences; materials science; structure analysis: X-ray analysis, micro-hardness indentation, magnetic domain analysis; non-destructive testing
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Frank Walther

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Guest Editor
Chair of Materials Test Engineering (WPT), TU Dortmund University, 44227 Dortmund, Germany
Interests: materials science and engineering; high-resolution microstructure and defect analysis; fatigue behavior with temperature and corrosion superposition; metrological material condition monitoring; fracture mechanics evaluation of damage tolerances; process-structure-property-damage interactions; mechanism-based material modeling and simulation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The fatigue life of metallic materials and their components is limited under exposure to repeated mechanical loads. Thus, an understanding of their damage evolution as well as estimation of the related (remaining) fatigue life is of major importance for their technical application in various fields.

In order to achieve the goal of a (remaining) fatigue life calculation, it is necessary to determine and provide comprehensive material information describing the microstructures and associated material mechanisms of metallic materials. In addition to external and internal loads, the material’s chemical composition, condition, geometry, and surface topography strongly influence the lifetime of its components or structure. Significant advances in the field of metallic materials have been achieved as a result of interdisciplinary research in related fields of non-destructive and destructive testing, material characterization, constitutive modeling, mathematical analysis, and numerical methods.

This Special Issue of Metals on “Fatigue Life Calculation Approaches for Metallic Materials” intends to present a collection of the latest developments in the field from well-known researchers. Areas of interest include the simulation and modeling of fatigue processes and material mechanisms, numerical analysis of fatigue data, comparison of empirical results, and the physical principles related to the development of approaches for the fatigue life calculation of materials exposed to cyclic loads.

Prof. Dr. Peter Starke
Prof. Dr. Frank Walther
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Metals is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • fatigue life calculation
  • characterization of the fatigue behaviour
  • simulation and modeling of the fatigue behaviour and mechanisms
  • generation of synthetic fatigue data
  • numerical analysis of fatigue data
  • remaining service life estimation for components and structures
  • advanced testing procedures for fatigue life calculations

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Published Papers (2 papers)

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Research

18 pages, 5687 KiB  
Article
Fracture–Mechanical Assessment of the Effect of Defects on the Fatigue Lifetime and Limit in Cast and Additively Manufactured Aluminum–Silicon Alloys from HCF to VHCF Regime
by Jochen Tenkamp, Mustafa Awd, Shafaqat Siddique, Peter Starke and Frank Walther
Metals 2020, 10(7), 943; https://doi.org/10.3390/met10070943 - 14 Jul 2020
Cited by 24 | Viewed by 4305
Abstract
Aluminum–silicon alloys are commonly used in die-cast and additively manufactured (AM) light-weight components due to their good processability and high strength-to-weight ratio. As both processing routes lead to the formation of defects such as gas and shrinkage porosity, a defect-sensitive design of components [...] Read more.
Aluminum–silicon alloys are commonly used in die-cast and additively manufactured (AM) light-weight components due to their good processability and high strength-to-weight ratio. As both processing routes lead to the formation of defects such as gas and shrinkage porosity, a defect-sensitive design of components is necessary for safe application. This study deals with the fatigue and crack propagation behavior of die-cast alloy AlSi7Mg0.3 and additively manufactured alloy AlSi12 and its relation to process-induced defects. The different porosities result in significant changes in the fatigue stress-lifetime (S–N) curves. Therefore, the local stress intensity factors of crack-initiating defects were determined in the high and very high cycle fatigue regime according to the fracture mechanics approach of Murakami. Through correlation with fatigue lifetime, the relationship of stress intensity factor (SIF) and fatigue lifetime (N) could be described by one power law (SIF–N curve) for all porosities. The relationship between fatigue limit and defect size was further investigated by Kitagawa–Takahashi (KT) diagrams. By using El Haddad’s intrinsic crack length, reliable differentiation between fracture and run out of the cast and AM aluminum alloys could be realized. SIF–N curves and KT diagrams enable a reliable fatigue design of cast and AM aluminum alloys for a finite and infinite lifetime. Full article
(This article belongs to the Special Issue Fatigue Life Calculation Approaches for Metallic Materials)
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17 pages, 5832 KiB  
Article
SteBLife, a New Approach for the Accelerated Generation of Metallic Materials’ Fatigue Data
by Ruth Acosta, Haoran Wu, Ramanan Sridaran Venkat, Fabian Weber, Jochen Tenkamp, Frank Walther and Peter Starke
Metals 2020, 10(6), 798; https://doi.org/10.3390/met10060798 - 16 Jun 2020
Cited by 10 | Viewed by 3092
Abstract
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 [...] Read more.
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. Full article
(This article belongs to the Special Issue Fatigue Life Calculation Approaches for Metallic Materials)
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